Circulation

Circulation Heaters
Max. Operating Typical Max.

Temperatures Watt Densities
Circulation Heaters Sheath Materials °F °C W/in2 W/cm2 Page
Circulation Heaters
STARFLOW™ 316L stainless steel 1000 537 30 4.6 329
WATROD™ and FIREBAR® Alloy 800/840 1600 870 120 18.6
Stainless steel 1200 650 120 18.6
331
Steel 750 400 120 18.6
Alloy 800 350 175 120 18.6
Booster Heaters Alloy 800 350 175 60 9.3
377
Steel 750 400 23 3.6
Engine Preheaters Alloy 800 1600 870 90 13.9 379
WATLOW® 327
328 WATLOW®
Circulation Heaters
STARFLOW™ Heaters
The STARFLOW™ circulation heater is engineered to

heat a flowing gas stream to 1000°F (537°C). The 316L
stainless steel chamber houses a small diameter sheathed
element, which allows for quick response to both heat-up
and cool down cycles.
Watlow’s starwound, coiled cable heater provides
extremely efficient and reliable heating by maximizing
the contact area of the gas or fluid with the element.
Because the element is sheathed, the unit can operate
in gas streams requiring a clean environment as well as
atmospheres containing contaminants and moisture.
This provides superior performance compared to units
with internally exposed or open element wires.
Performance Capabilities
• Temperatures up to 1000°F (537°C), 316L stainless
steel sheath Process
Thermocouple
• Maximum watt densities up to 30 W/in2 (4.7 W/cm2) Outlet
Tube
Fitting
• Maximum voltage up to 240V
Features and Benefits

Small diameter heater Inlet Tube
• Allows for quick response time
Internal starwound element Cable
Circulation
• Provides fast, efficient heating Heater
Sheathed element O-Ring Groove
Heater
HeaterAdapter
Adapter
• Provides the ability to heat in clean or impure streams Exit
Exit
Flexibility in configurations
• Allows for adaptability to any process
316L stainless steel Typical Applications
• Provides a rugged and corrosion resistant construction • Semiconductor processing
Electropolishing available on all wetted surface • Curing and drying
• Reduces particulate contamination • Electronics
Note: Contact your Watlow representative for ultra-high
• Heat shrinking
purity applications
• Thermoforming/sealing
Low pressure loss
• Minimizes flow restriction
Note: Not suitable for use as a pressure vessel
Type J or K thermocouples
• Provide precise control and high-limit safety
Replaceable heater and thermocouple
• Reduces replacement cost
Shipment from stock
• Reduces downtime
WATLOW® 329
Circulation Heaters
STARFLOW Heaters
10 in. (254 mm)
9.25 in. (235 mm)
ø.3.5 in.
(89 mm)
ø.2.5 in.
(64 mm) 1.26 in. Ref.
(32 mm) Process T/C Fitting
4 in. (102 mm)
2 in. (51 mm)
Inlet Tube
Outlet Tube
Heater Adapter Exit

O-Ring Groove
1.32 in. Ref.
(34 mm)
0.25 in. ø3 in. (76 mm) B.C.
(6 mm) (8) : ¼-20 Threads
Ordering Information
Part Number
① ② ③ ④ ⑤ ⑥ ⑦⑧⑨⑩ ⑪ ⑫ ⑬ ⑭
Internal T/C Surface Finish Process T/C
Type of Type of Heater Calibration of Assembly Calibration O-Ring
Inlet Outlet Wattage (Heater) and Heater (Assembly) Material
C H
③ ④ Type of Inlet ⑫ Surface Finish of Assembly and Heater

ET = 1/4 in. (6 mm) O.D. tube X= Unfinished
JT = 1/2 in. (13 mm) O.D. tube E= Electropolished
⑤ ⑥ Type of Outlet ⑬ Process Thermocouple Calibration (Assembly)

ET = 1/4 in. (6 mm) O.D. tube J= Type J
JT = 1/2 in. (13 mm) O.D. tube K= Type K
⑦⑧⑨⑩ Heater Wattage ⑭ O-Ring Material

0375 = 120V, 375 W A= FKM (FPM) 500°F (260°C)
0500 = 120V, 500 W M= Alloy X750 1300°F (704°C)
0750 = 120V, 750 W T= PTFE encapsulated FKM (FPM) 392°F (200°C)
1500 = 240V, 1500 W
2000 = 240V, 2000 W
3000 = 240V, 3000 W
⑪ Internal Thermocouple Calibration (Heater)

J= Type J
K= Type K
RAPID SHIP
• Next day shipment
330 WATLOW®
Circulation Heaters
WATROD™ and FIREBAR®

Circulation Heaters
Circulation heaters provide a ready-made means to

install electric heating with a minimal amount of time
and labor. This is accomplished by combining heating
elements, vessel, insulation, terminal enclosure,
mounting brackets and inlet and outlet connections
into a complete assembly.
Made from NPT screw plug or ANSI flange heater
assemblies mated with a pressure vessel (tank),
circulation heaters are designed to heat forced-circulation
air, gases or liquids. Ideal for either in-line or side-arm
operations, these assemblies direct fluids past FIREBAR®
or WATROD™ heating elements, to deliver fast response Flange
Assembly
and even heat distribution. Gasket
Watlow® meets virtually all your circulation heater

assembly needs with made-to-order units. These units Threaded
Pipe Outlet
can be made from a wide range of heating element
sheath materials, wattages, vessel sizes and materials,
pressure ratings, terminal enclosures and controls. Jacket
Mounting
Lugs
Performance Capabilities 1 in. (25 mm)
Insulation
• Watt densities up to 120 W/in2 (18.6 W/cm2) Pressure
Vessel
• Wattages up to three megawatts
Threaded
• UL® and CSA component recognition up to 690VAC Pipe Inlet
• Ratings up to ANSI Class 600 pressure class
• Alloy 800/840 sheath temperatures up to 1600°F
(870°C) FIREBAR assemblies pack more wattage in a
• Passivated 316 stainless steel sheath temperatures up smaller heater bundle
to 1200°F (650°C) • Replaces larger flanges with round tubular elements,
• Steel sheath temperatures up to 750°F (400°C) with a smaller package
Compacted MgO insulation filled elements
Features and Benefits • Maximizes dielectric strength, heat transfer and life
Catalog screw plug and flange part numbers 1 inch (25 mm) thermal insulation rated to
• Provides a wide selection of WATROD and FIREBAR 750°F (400°C)
elements to meet specific application requirements • Reduces heat loss from the vessel
Type Sizes (in.) Heavy-gauge steel jacket (shroud)
NPT Screw Plugs 11/4, 21/2 • Protects thermal insulation and heating vessel and
comes with protective primer coating
ANSI flanges 3, 4, 5, 6, 8, 10, 12, 14
ANSI B16.5 Class 150 on 4 or 6 inch FIREBAR

element flanges and 3 to 14 inch WATROD
element flanges
• Meets recognized agency standards
WATLOW® 331
Circulation Heaters
WATROD and FIREBAR

Circulation Heaters
Features and Benefits (Continued) Flange mounting holes

All catalog units rated to ANSI pressure Class 150 • Straddles centerline to comply with industry standards
• Provides pressure vessels (tanks) that are either UL® and CSA component recognition under file
carbon, 304 or 316 stainless steel numbers E52951 and 31388 respectively
Standard offering includes units rated for up to • Meets industry safety standards
and including ANSI pressure class 600 (application Typical Applications
review required)
Water:
• Provides pressure vessels (tanks) available in carbon
steel, 304 or 316 stainless steel materials • Deionized
• Includes schedule 40, standard and 80 pipe used in • Demineralized
the pressure vessel construction • Clean
Catalog units provided with NPT or ANSI Class 150 • Potable
nozzle connection • Process
• Makes installation easy. Inlet and outlet nozzle • Industrial water rinse tanks
connections are threaded MNPT on 8 in. (203 mm)
• Hydraulic oil, crude, asphalt
and smaller tanks. Class 150 flanged connections on
10 in. (254 mm) and larger tanks • Lubricating oils at API specified watt densities
Mounting lugs are welded onto the tank wall of all • Heat transfer oil
21/2 in. (64 mm) NPT and larger units • Paraffin
• Provides mounting support • Caustic cleaners
General purpose, moisture resistant, enclosures • Nitrogen, hydrogen and other air/gas systems
available
• Offers easy access to terminal wiring • Superheating steam
Options Certified Enclosures

Terminal Enclosures CSA, ATEX or IECEx certified enclosures protect wiring in
hazardous gas environments. These terminal enclosures,
General purpose terminal enclosures, without covered under CSA file number 61707, ATEX certificate
thermostats, are supplied on all Watlow circulation # SIRA 10ATEX 1155X or IECEx certificate # IECEx CSA
heaters. Moisture and explosion resistant ratings are 09.0010 are available on WATROD flange heaters. For
available to meet specific application needs. For screw additional information, see page 567 and 568 or contact
plug terminal enclosures, refer to page 171. your Watlow representative.
For flange terminal enclosures, refer to page 243.
For products that will be installed in hazardous locations,
Stand-off Terminal Enclosures please provide the following information:
Stand-off terminal enclosures help protect terminal • Operating conditions
enclosures against excessive temperatures. For details, • Minimum and maximum ambient temperatures for the
refer to page 239. installation location
• Mounting orientation
ASME Pressure Vessel Code Welding Watlow must understand this information so that an
Flange or screw plug assemblies can be provided with appropriate design can be provided.
an ASME Section VIII, Div. I pressure vessel stamp upon
request. Thermostats
To provide process temperature control, Watlow
Branch Circuits offers optional single- and double-pole thermostats.
Branch circuits are designed for 48 amperes per circuit Thermostats are typically mounted in the terminal
maximum. Contact your Watlow representative for circuit enclosure. Optional side mounting on vessel also
requirements other than those listed in the stock charts. available.
See Screw Plug Immersion Heaters, page 167 and
Flange Immersion Heaters, on page 239 for details.
332 WATLOW®
Direction of Flow
Circulation Heaters
WATROD and FIREBAR

Circulation Heaters
Direction of Flow
Options (Continued)
Baffles Sheath Materials

The following sheath materials are available on WATROD
Direction of Flow and FIREBAR heating elements:
Standard Sheath Materials
WATROD Alloy 800/840
316 SS
Steel
FIREBAR Alloy 800, 304 SS
Baffles mounted on the heating element bundle enhance
and/or modify liquid or gas flow for better heat transfer. Made-to-Order Sheath Materials
For critical sheath temperature and low flow conditions, WATROD 304 SS
baffles may be required. Alloy 600
Titanium
Contact your Watlow representative for details.
Hastelloy C276
Thermocouples
To sense process or element sheath temperature, ASTM Wattages and Voltages
Type J or K thermocouples are available. Watlow routinely supplies circulation heaters with
120 to 690VAC as well as wattages from 500 watts
See Screw Plug Immersion Heaters, page 168 and
to one megawatt. If required, Watlow will configure
Flange Immersion Heaters, on page 239 for details.
circulation heaters with voltages and wattages outside
these parameters.
Process Thermocouple in Nozzle For more information on special voltage and wattage
(Must specify which nozzle) configurations, contact your Watlow representative.
Ref
T
Ref. Ref. Dimension

Tank Size Nozzle Size “A”
11/4 3/4 NPT 83/16
21/2 1 NPT 83/16
3 1 NPT 83/16
4 11/2 NPT 103/8
5 2 NPT 111/16
6 21/2 NPT 133/8
8 21/2 NPT 143/8
For 10 in. (254 mm) and larger tanks contact your Watlow representative
for dimension.
WATLOW® 333
Circulation Heaters
WATROD and FIREBAR

Circulation Heaters
Options (Continued)
Pressure Vessels Inlet and Outlet Nozzle Connections

All catalog pressure vessel (tank) materials consist of All inlet and outlet materials are compatible with the
standard schedule and 150# class forged fittings and are pressure vessel material and pressure class rating.
made from one of the following materials: Vessel sizes from 11/4 to 8 inches are typically
• Carbon steel configured with MNPT (Male National Pipe Thread)
nozzles. Optional NPT and flange sizes can be supplied
• 316 stainless steel
to mate with existing piping.
All catalog pressure vessels (tanks) are steel unless
10 inch and larger vessels are supplied with Class 150
otherwise noted.
inlet and outlet flanges. Optional Class 300 or Class 600
316 stainless steel pressure vessels (tanks) are can be provided to mate with existing piping.
passivated on all wetted surfaces. Available from
To order, specify type, size and pressure class rating
Assembly Stock on 21/2 inch NPT and 4 or 6 inch ANSI
for both inlet and outlet nozzle/flange connections.
flange circulation heaters.
Passivated Finish Protective Steel Jacket (Shroud)

For critical applications, passivation will remove free iron To protect circulation heaters from weather or
from all wetted surfaces. wash-down conditions, partially welded (standard) outer
Contact your Watlow representative for details. protective steel jackets are available. Standard steel, or
made-to-order 304 or 316 stainless steel or aluminum
can be supplied. Jacket diameter is dependent upon
Gaskets thermal insulation thickness.
Rubber, asbestos-free and spiral wound gaskets are To order, specify protective steel jacket, material type
available for all heater flange, and inlet and outlet and weatherproof, if desired.
flange sizes.
Watlow recommends ordering spares in case replace-
ment becomes necessary.
To order, specify gasket type, flange size/rating and
process operating temperature.
For details on gasket materials and temperature ratings,
see page 240.
334 WATLOW®
Circulation Heaters
WATROD and FIREBAR

Circulation Heaters
Technical Data
Maximum Velocities Application Hints

The rate at which a gas or liquid flows through inlet and • Select the recommended heating element sheath
outlet pipes is critical to maintaining the desired output material and watt density for the substance being
temperature. Pressure drop through the circulation heater heated. Use the Supplemental Applications Chart on
must be considered to properly size blowers or pumps. pages 555 to 558. If unable to determine the
The Maximum Velocity to Avoid Excessive Pressure Drop correct heating element type and material, contact
chart gives recommended maximum velocities, in feet per your Watlow representative.
second and meters per second of gas or liquid being • Assure selecting proper vessel by considering the
heated and nominal pipe size. pressure or flow rate, process temperature and
Maximum Velocity to Avoid Excessive Pressure Drop corrosiveness of the media being heated. If assistance
with vessel selection is required, contact your Watlow
Nominal Pipe Size Maximum Velocity
Fluid in. ft/sec (m/sec)
representative.
Gases All 200 (61.0) • For maintenance/replacement procedures, retain an
Liquid 4 and smaller 10 (3.0) area twice the circulation heater’s overall length to
Liquid 6-8 15 (5.0) permit easy removal and inspection of screw plug
Liquid 10-12 19 (6.0) or flange heater assemblies.
Liquid 14-16 21 (6.4)
Liquid 18-20 23 (7.0)
• Choose a FIREBAR assembly when you require:
Liquid 24 24 (7.3) • A smaller package
• More kilowatts or lower watt density in an equally
sized WATROD circulation tank
Vessel Orientation Guidelines • Minimize problems associated with low flow or low
Correctly orienting the heating vessel assures lower
liquid level conditions with a low liquid level sensor
terminal enclosure temperatures and element immersion.
and/or sheath high-limit control.
Detailed instructions on vessel orientation are contained
in the Installation and Maintenance Instructions that • Ensure wiring integrity by making sure terminal enclosure
accompanies all circulation heaters. temperature does not exceed 400°F (205°C).
The following are guidelines for vessel orientation in liquid • Size power feeder wires in accordance with national
and gas heating applications. electrical code guidelines and other applicable codes.
Liquids • Protect against electrical shock by properly grounding
the unit per NEC requirements.
Orient circulation heater:
• One or more circulation heaters may be connected in
• Horizontally with inlet and outlet pipes pointing up
series to achieve the desired total kilowatt or
• Vertically with the terminal enclosure up and the inlet temperature output.
pipe on the bottom
These orientations ensure the heating elements will be
immersed at all times and help prevent premature failure.
Air or Gases
Orient circulation heater:
• Horizontally with the inlet nozzle closest to the terminal
enclosure
• Vertically with terminal enclosure at the bottom of the
tank. Use the nozzle nearest the bottom as the inlet
connection
If installation constraints do not allow mounting in
accordance with these guidelines, contact your
Watlow representative.
WATLOW® 335
d ed y
it
t en il
b
Circulation Heaters Exapa
C
WATROD and FIREBAR

Circulation Heaters
Performance Capabilities Options

• Up to 3000psi design pressure Exotic Sheath Materials
Contact your Watlow representative for details and
Features and Benefits availability.
Offering includes units rated above ANSI pressure
class 600 Pressure Vessels
• Pressure vessel tanks are available in “H” series Made-to-order units can be made in a variety of materials,
stainless steel, Titanium, alloy 800, alloy 600, Chrome flange sizes and pressure classes.
Moly, alloy 400, Duplex and 321 stainless steel To order, specify pressure vessel (tank) size, material
and pressure class.
Ratings to ANSI class 2500 pressure class are available
for high-pressure applications.
High-Temperature Thermal Insulation

To further minimize heat loss, the pressure vessel’s
standard one inch thermal insulation wrap may be
replaced with thicker or higher temperature insulation.
For more information, contact your Watlow representative.
To order, specify insulation thickness, standard or
high temperature insulation and temperature rating.
Vessels may be supplied with a primer coating
without insulation.
To order, specify no insulation.
Support Saddles
To mate with an existing installation, customized support
saddle(s) and/or mounting lugs are available.
To order, specify mounting lugs or support saddles
and supply a dimensional drawing.
336 WATLOW®
Circulation Heaters
WATROD and FIREBAR ®

Circulation Heaters ®
Application: Clean Water 5
• WATROD or FIREBAR elements

• Without thermostat
• General purpose enclosure
# Part Ship Wt. “A” Dim. “B” 1Dim. 11/4 inch NPT Screw Plug
1/4 NPT “C” Dim.
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. SCREW
(mm)PLUGin. (mm)
1 1/4 NPT
11/4 inch NPT Screw Plug (WATROD) SCREW PLUG 67⁄16 in. Ref.
60 W/in2 4 120/240 3.0 1 1 CBEN15A6S RS 23 (11) 245/8 (625.5) 15 (381) 31/8 (79.4) (163.5 mm)
67⁄16 in. Ref.
Steel Tank (163.5 mm)
240 4.0 1 1 CBEN19A10S RS 29 (14) 245/8 (625.5) 15 (381) 31/8 (79.4)
2-Alloy 800
Elements 240 5.0 1 1 CBEN23J10S RS 29 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
¾ in.
(9.3 W/cm2) 240 6.0 1 1 CBEN27J10S RS 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) NPT
¾ in.Inlet
andInlet
NPT Outlet
and Outlet A Ref.
11/4 inch NPT Screw Plug (FIREBAR) B A Ref.
90 W/in2 B
240 1.5 1 1 CBDNF7R10S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
Steel Tank
480 1.5 1 1 CBDNF7R11S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
1-Alloy 800
Element 240 3.0 1 1 CBDNF11G10S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
(14 W/cm2) 480 3.0 1 1 CBDNF11G11S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
C Ref.
240 5.0 3 1 CBDNF16G3S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4) C Ref.
480 5.0 3 1 CBDNF16G5S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4) ½ in.
4 in. ½ in.
NPT
240 6.5 3 1 CBDNF19G3S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) 4(102
in. mm)NPT
(102 mm) Drain Drain
480 6.5 3 1 CBDNF19G5S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
240 8.5 3 1 CBDNF24L3S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
480 8.5 3 1 CBDNF24L5S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
3¾3¾ in. in.
240 10.5 3 1 CBDNF29R3S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) (95(95
mm)mm)
480 10.5 3 1 CBDNF29R5S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)

240 12.7 3 1 CBDNF34R3S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) 21/2 inch NPT Screw Plug
480 12.7 3 1 CBDNF34R5S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
240 17.0 3 1 CBDNF45G3S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) 73⁄16
73⁄16
in.in.
Ref.
Ref.
22 1/2
1/2 NPT
NPT (182.6 mm)
(182.6 mm) 113⁄16 in. in.
113⁄16
480 17.0 3 1 CBDNF45G5S M 69 (32) 635/8 (1616.1) 53
SCREW(1346)
SCREW PLUG
PLUG 43/8 (111.1) (284.2 mm)
(284.2 mm)
480 21.5 3 1 CBDNF55R5S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1) 1 in.
1 in.
NPT
NPTInlet
Inlet
and Outlet
and Outlet
21/2 inch NPT Screw Plug (WATROD)
60 W/in2 240 6.0 3 1 CBLN714L3S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419) B
A Ref.
A Ref.
Steel Tank B C
C
3-Alloy 800 480 6.0 3 1 CBLN714L5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
240 7.5 3 1 CBLN717L3S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419) 1¼ in.
Elements 1¼ in.
(32 mm)
(9.3 W/cm2) 480 7.5 3 1 CBLN717L5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419) (32 mm)
240 9.0 3 1 CBLN720L3S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419)
415⁄16 in.
480 9.0 3 1 CBLN720L5S RS 26 415⁄16
(12) 343/4 (881) 221/2 (572) 161/2 (419) (125.4 mm)in.
(125.4 mm)Ref.
240 12.0 3 1 CBLN726C3S RS 27 (13) 443/4 (1135) 321/2 (1129) 261/2 (673) Ref. ½ in.
55⁄8 in. NPT Drain
½ in.
3⁄8-16 UNC
480 12.0 3 1 CBLN726C5S RS 27 (13) 443/4 (1135) 321/2 (1129) 261/2 (673)
(Threads (142.9 mm)
3⁄8-16 UNC
240 15.0 3 1 CBLN731L3S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) (4 (Threads
Places) (142.9 mm)
31⁄8 in.
(4 Places) (79.4 3mm)
480 15.0 3 1 CBLN731L5S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) 1⁄8 in.
(79.4 mm)
240 18.0 3 1 CBLN737C3S RS 30 (14) 571/4 (1453) 45 (1143) 39 (991) 43⁄8 in.
480 18.0 3 1 CBLN737C5S RS 30 (14) 571/4 (1453) 45 (1143) 39 (991) (111.1 mm)
43⁄8 in.
RAPID SHIP
4 Wired for higher voltage (111.1 mm)
5 When steel vessel materials are used in this

• RS - Next day shipment application, some rust may be present in the 43⁄8 in.
up to 5 pieces process media 3"-150#
(111.1 mm)
43⁄8 in.
• M - Manufacturing lead times FLANGE (111.1 mm)
3"-150#
WATLOW ®
FLANGE 337
½ in.
NPT Drain
½ in.
SCREW PLUG
67⁄16 in. Ref.

(163.5 mm)
¾ in.
NPT Inlet
and Outlet
A Ref.
¾ in.
B NPT Inlet
Circulation Heaters
and Outlet
A Ref.
B
WATROD and FIREBAR C Ref. ®

C Ref. ½ in.
4 in. NPT
(102 mm) Drain
½ in.
4 in.
Application: Clean Water 5 (102 mm)
NPT
Drain

3¾ in.
• Without thermostat (95 mm)
3¾ in.
• General purpose enclosure (95 mm)
1
# Part Ship Wt. “A” Dim. “B” Dim. “C” Dim. 2 /2 inch NPT Screw Plug
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm) in. (mm)
21/2 inch NPT Screw Plug (FIREBAR) 73⁄16 in. Ref.
90 W/in2 8 240 15.0 3 1 CBLNF15C3S 1/22 (572)
1/2 NPT
M 22 (10) 343/4 (881) 22SCREW 161/2 (419) (182.6 mm)
73⁄16 in. Ref. 113⁄16 in.
PLUG
2 1/2 NPT (182.6 mm) (284.2 mm)
Steel Tank 113⁄16 in.
480 15.0 3 1 CBLNF15C5S M 22 (10) 343/4 (881) 221/2 (572) 161/2 (419)
SCREW PLUG (284.2 mm)
3-Alloy 800 1 in.
240 20.0 3 1 CBLNF18C3S M 23 (11) 343/4 (881) 221/2 (572) 161/2 (419) NPT Inlet 1 in.
Elements and Outlet
NPT Inlet
(14 W/cm ) 480 20.0 3
2 3 1
1 CBLNF18C5S 3 M 23 (11) 34 /4 (881) 22 /2 (572) 16 /2 (419)1 and Outlet
480 25.0 3 1 CBLNF23C5S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) A Ref.
B C A Ref.
480 32.0 3 1 CBLNF28L5S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) B C
480 38.0 3 1 CBLNF33L5S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) 1¼1in.
¼ in.
(32 (32
mm) mm)
3 inch - 150 lb ANSI Flange (WATROD)

60 W/in2 415⁄16 in.
415⁄16 in.
120 6.0 1 1 CFMN715J10S RS 66 (30) 351/4 (894) 221/2 (573) 161/2 (419) (125.4(125.4
mm) mm)
Steel Tank Ref.Ref.
240 6.0 3 1 CFMN715J3S RS 66 (30) 351/4 (894) 221/2 (573) 161/2 (419) ½ in.
½ in.
3-Alloy 800 NPT Drain
480 6.0 1 1 CFMN715J11S RS 66 (30) 351/4 (894) 221/2 (573) 161/2 (419) 3⁄8-163⁄8UNC
-16 UNC 5⁄8 in. NPT
55⁄8 5in. Drain
Elements (Threads (142.9
(142.9 mm) mm)
(Threads
(9.3 W/cm2) 480 6.0 3 1 CFMN715J5S RS 66 (30) 351/4 (894) 221/2 (573) 161/2 (419) (4 Places)
(4 Places)
1⁄8 in.
1⁄83in.
3(79.4
120 9.0 1 1 CFMN721J10S 1 1 1
RS 70 (32) 35 /4 (894) 22 /2 (573) 16 /2 (419) mm)
(79.4 mm)
240 9.0 3 1 CFMN721J3S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) 43⁄8 in.
43⁄8 in. mm)
(111.1
480 9.0 1 1 CFMN721J11S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) (111.1 mm)
480 9.0 3 1 CFMN721J5S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419)
3 inch - 150 lb ANSI Flange
240 12.0 3 1 CFMN727A3S M 80 (37) 451/4 (1148) 321/2 (826) 261/2 (673) 43⁄8 in.
480 12.0 1 1 CFMN727A11S M 80 (37) 451/4 (1148) 321/2 (826) 263"-150#
1/2 (673) 4(111.1
3⁄8 in. mm)
FLANGE (111.1 mm)
3"-150# 1
480 12.0 3 1 CFMN727A5S M 80 (37) 451/4 (1148) 321/2 (826) 26 /2 (673)
FLANGE
½ in.
240 15.0 3 1 CFMN732J3S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) NPT Drain
½ in.
480 15.0 1 1 CFMN732J11S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) NPT Drain
711⁄16 in. Ref.
480 15.0 3 1 CFMN732J5S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) (195.3 mm) 11½ in. Ref.
240 18.0 3 1 CFMN738A3S M 98 (45) 573/4 (1465) 45 (1143) 39 11⁄16 in. Ref.
(991) 7(195.3 (292 mm)
mm)
1 in. 11½ in. Ref.
480 18.0 1 1 CFMN738A11S M 98 (45) 573/4 (1465) 45 (1143) 39 (991) NPT Inlet (292 mm)
A Ref. 1 in. Outlet
&
480 18.0 3 1 CFMN738A5S M 98 (45) 573/4 (1465) 45 (1143) 39 (991) B
NPT Inlet C
A Ref. & Outlet
RAPID SHIP 3 Wired for 3-phase operation only B C in.

1¼
(32 mm)
5 When steel vessel materials are used in this (2 Places)
• RS - Next day shipment application, some rust may be present in the 3⁄8-16 UNC 1¼ in.
up to 5 pieces 55⁄8 mm)
(32 in. Ref.
process media (Threads (2(142.9 mm)
Places)
• M - Manufacturing lead times (4 Places)
55⁄8 ½
8 Can be wired for 1-phase operation 3⁄8-16 UNC in.in.
Ref.
31⁄8 in. Dia.
(Threads (142.9
NPT mm)
Truck Shipment only (79.4 mm) Ref.
(4 Places) Drain
½ in.
31⁄8 in. Dia. NPT
(79.4 mm) Ref. Drain
338 WATLOW®
Circulation Heaters

®
Circulation Heaters

# Part Ship Wt. “A” Dim. “B” Dim. “C” Dim. 4 inch - 150 lb ANSI Flange
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm)
4"-150#
in. (mm) 513⁄16 in.
4 inch - 150 lb ANSI Flange (WATROD) FLANGE (147.6 mm)
60 W/in2 240 12.0 1 2 CFON715J10S M 124 (57) 39 (989) 201/2 (521) 17 (432)
Steel Tank ½ in.
240 12.0 3 1 CFON715J3S M 124 (57) 39 (989) 201/2 (521) 17 (432)
Elements 480 12.0 1 1 CFON715J11S M 124 (57) 39 (989) 201/2 (521) 17 (432)
(9.3 W/cm2) 480 12.0 3 1 CFON715J5S M 124 (57) 39 (989) 201/2 (521) 17 (432) 125⁄8 in. Ref. 143⁄8 in. Ref.
(320.7 mm) (365.1 mm)
240 18.0 1 2 CFON721J10S M 127 (58) 39 (989) 201/2 (521) 17 (432)
240 18.0 3 1 CFON721J3S M 127 (58) 39 (989) 201/2 (521) 17 (432) 1½ in.
A Ref. NPT Inlet
480 18.0 1 1 CFON721J11S M 127 (58) 39 (989) 201/2 (521) 17 (432) and Outlet
B C
480 18.0 3 1 CFON721J5S M 127 (58) 39 (989) 201/2 (521) 17 (432)
240 24.0 1 2 CFON727A10S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699)
1¼ in.
240 24.0 3 2 CFON727A3S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699) (32 mm)
(2 Places)
480 24.0 1 1 CFON727A11S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699) 3⁄8(Threads
-16 UNC 65⁄8 in.
(168.3 mm)
480 24.0 3 1 CFON727A5S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699) (4 Places)
½ in.
311⁄16 in. NPT
240 30.0 3 2 CFON732J3S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) (93.7 mm) Drain
480 30.0 1 2 CFON732J11S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699)
480 30.0 3 1 CFON732J5S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699)
5"-150# 59⁄16 in. Ref.
240 36.0 3 2 CFON738A3S M 229 (104) 701/2 (1789) 52 (1321) 48 1/2 (1232)
FLANGE (141.3 mm)
480 36.0 1 2 CFON738A11S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) ½ in.
NPT Drain
480 36.0 3 1 CFON738A5S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232)
480 50.0 3 2 CFON751A5S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232)
125⁄8 in. Ref.
480 60.0 3 2 CFON760J5S M 297 (135) 911/2 (2326) 73 (1854) 66 (1676) (320.7 mm)
C
• M - Manufacturing lead times 5 When steel vessel materials are used in this
2 in.
application, some rust may be present in the NPT Inlet
process media A Ref. and Outlet
25 in.
B
(635 mm)
Truck Shipment only
1¼ in.
(32 mm)
(2 Places)
3⁄8-16 UNC 75⁄8 in.

(Threads (193.7 mm)
(4 Places)
½ in.
NPT
Drain
4¼ in.
(108 mm)
65⁄8 in. Ref.

6"-150#
(168.3 mm)
FLANGE
½ in.
NPT Drain
1211⁄16 in. Ref. 147⁄16 in. Ref.

(322.3 mm) (366.7 mm)
2½ in.
NPT Inlet
A Ref. and Outlet
B C
WATLOW® 339
3½ in.
4"-150# 513⁄16 in.
FLANGE (147.6 mm)
4"-150# 513⁄16 in.
FLANGE (147.6 mm)
½ in.
NPT Drain
½ in.
Circulation Heaters
NPT Drain
125⁄8 in. Ref. 143⁄8 in. Ref.
(320.7 mm) (365.1 mm)
125⁄8 in. Ref. 143⁄8 in. Ref.
(320.7 mm) (365.1 mm)
1½ in.
WATROD and FIREBAR A Ref. NPT Inlet
and Outlet
B 1½ in.
®
Circulation Heaters A Ref. NPT Inlet ®C
and Outlet
B C
1¼ in.
(32 mm)
3⁄8-16 UNC
1¼ (2 Places)
in.
5⁄8 in.
6(32 mm)
(Threads (168.3 mm)
• WATROD or FIREBAR elements (4 Places)
3⁄8-16 UNC
(2 Places)
65⁄8 in.½ in.
• Without thermostat (Threads
(4 Places)311⁄16 in.
(168.3 mm) NPT
(93.7 mm) ½ in. Drain
• General purpose enclosure 311⁄16 in. NPT
(93.7 mm) Drain
Description Volts kW Ph Circ. Number Del lbs (kg) in. (mm) in. (mm) in. (mm) 59⁄16 in. Ref.
5"-150#
59⁄16 in. Ref.
60 W/in2 240 24.0 1 3 CFNN727A10S M 140 (64) 491/4 (1249.0) 30 147/8 (378.8)
(762)5"-150# (141.3 mm)
FLANGE ½ in.
Steel Tank 240 24.0 3 2 CFNN727A3S M 140 (64) 491/4 (1249.0) 30 (762) 147/8 (378.8) NPT Drain
6-Alloy 800 480 24.0 1 3 CFNN727A11S M 140 (64) 491/4 (1249.0) 30 (762) 147/8 (378.8) ½ in.
Elements 480 24.0 3 NPT Drain
1 CFNN727A5S M 140 (64) 491/4 (1249.0) 30 (762) 147/8 (378.8)
(9.3 W/cm )2 125⁄8 in. Ref.
240 30.0 3 2 CFNN732J3S M 142 (65) 491/4 (1249.0) 30 (762) 147/8 (378.8) (320.7 mm)
1 7 12 5⁄8 in. Ref. C
480 30.0 1 2 CFNN732J11S M 142 (65) 49 /4 (1249.0) 30 (762) 14 /8 (378.8)
(320.7 mm)
480 30.0 3 1 CFNN732J5S M 142 (65) 491/4 (1249.0) 30 (762) 147/8 (378.8) C
2 in.
240 36.0 3 2 CFNN738A3S M 160 (73) 561/4 (1427.0) 37 (940) 185/8 (473.1) NPT Inlet
A Ref. and
2 in.Outlet
480 36.0 1 2 CFNN738A11S M 160 (73) 561/4 (1427.0) 37 (940) 185/8 (473.1) NPT Inlet 25 in.
B
A Ref. and Outlet (635 mm)
480 36.0 3 1 CFNN738A5S M 160 (73) 561/4 (1427.0) 37 (940) 185/8 (473.1) 25 in.
B
480 50.0 3 2 CFNN751A5S M 180 (82) 673/4 (1719.0) 481/2 (1232) 25 (633.0) (635 mm)
1¼ in.
480 60.0 3 2 CFNN760J5S M 190 (87) 811/8 (2060.6) 617/8 (1572) 307/8 (784.2) (32 mm)
1¼ in.
(2 Places)
(32 mm)
(2 Places)
5 inch - 150 lb ANSI Flange (WATROD) 3⁄8-16 UNC 75⁄8 in.
60 W/in2 (Threads (193.7 mm)
240 36.0 3 3 CFNN727A3XS M 145 (66) 491/4 (1249.0) 30 (762) 147/8 (378.8)3⁄8-16 UNC
(4 Places) 75⁄8 in.
Steel Tank 480 36.0 1 3 CFNN727A11XS M 145 (66) 491/4 (1249.0) 30 (762) 147/8 (378.8)(Threads ½ in.
(193.7 mm)
(4 Places) NPT
9-Alloy 800 480 36.0 3 1 CFNN727A5XS M 145 (66) 491/4 (1249.0) 30 (762) 147/8 (378.8) ½ in.
Drain
Elements NPT
240 45.0 3 3 CFNN732J3XS M 147 (67) 491/4 (1249.0) 30 (762) 147/8 (378.8) 4¼ in. Drain
(9.3 W/cm2)
480 45.0 1 3 CFNN732J11XS M 147 (67) 491/4 (1249.0) 30 (762) 147/8 (378.8) (108 mm)
4¼ in.
480 45.0 3 3 CFNN732J5XS M 147 (67) 491/4 (1249.0) 30 (762) 147/8 (378.8) (108 mm)
240 54.0 3 3 CFNN738A3XS M 166 (76) 561/4 (1427.0) 37 (940) 185/8 (473.1)
480 54.0 1 3 CFNN738A11XS M 166 (76) 561/4 (1427.0) 37 (940) 185/8 (473.1) 6 inch - 150 lb ANSI Flange
65⁄8 in. Ref.
1 6"-150#
480 54.0 3 3 CFNN738A5XS M 166 (76) 56 /4 (1427.0) 37 (940) 185/8 (473.1) (168.3 mm)
FLANGE 65⁄8 in. Ref.
480 75.0 3 3 CFNN751A5XS M 188 (86) 673/4 (1719.0) 481/26"-150#
(1232) 25 (633.0) (168.3 mm)
FLANGE
480 90.0 3 3 CFNN760J5XS M 200 1 7 7
(91) 81 /8 (2060.6) 61 /8 (1572) 30 /8 (784.2) ½ in.
NPT Drain
½ in.
NPT Drain
1211⁄16 in. Ref. 147⁄16 in. Ref.
60 W/in2 240 24.0 1 3 CFPN715G10S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) (322.3 mm) (366.7 mm)
Steel Tank 1211⁄16 in. Ref. 147⁄16 in. Ref.
240 24.0 3 2 CFPN715G3S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) (322.3 mm) (366.7 mm)
12-Alloy 800 480 24.0 1 2 CFPN715G11S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) 2½ in.
Elements 480 24.0 3 1 CFPN715G5S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) NPT Inlet
½ in.Outlet
2and
(9.3 W/cm2) A Ref. NPT Inlet
240 36.0 1 4 CFPN721G10S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) B C
A Ref. and Outlet
240 36.0 3 2 CFPN721G3S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) B C
480 36.0 1 2 CFPN721G11S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
480 36.0 3 1 CFPN721G5S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) 3½ in.
240 48.0 3 4 CFPN726R3S M 222 (101) 51 (1294) 31 (787) 271/2 (699) 3½
(89 mm)
in.
(2 Places)
480 48.0 1 3 CFPN726R11S M 222 (101) 51 (1294) 31 (787) 271/2 (699) (89 mm)
¾ in.
¾-10 UNC 2B (28Places)
480 48.0 3 2 CFPN726R5S M 222 (101) 51 (1294) 31 (787) 271/2 (699) (Threads (222 mm)
8¾ in.
¾-10(4 UNC 2B
Places)
240 60.0 3 4 CFPN732G3S M 288 (131) 51 (1294) 31 1
(787) 27 /2 (699) (Threads (222 mm)
½ in.
1 (4 Places) NPT
480 60.0 1 3 CFPN732G11S M 288 (131) 51 (1294) 31 (787) 27 /2 (699) ½ in.
NPTDrain
480 60.0 3 2 CFPN732G5S M 288 (131) 51 (1294) 31 (787) 271/2 (699) 4¾ in. Drain
240 72.0 3 4 CFPN737R3S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) 4(121
¾ in.mm)
480 72.0 3 2 CFPN737R5S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) (121 mm)
480 100.0 3 4 CFPN750R5S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 120.0 3 4 CFPN760G5S M 360 (164) 93 (2361) 73 (1854) 66 (1676)
application, some rust may be present in the
process media
Truck Shipment only
340 WATLOW®
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C
Circulation Heaters A Ref.

2 in.
NPT Inlet
and Outlet
25 in.
B
(635 mm)
WATROD and FIREBAR ® 1¼ in.

(32 mm)
®
Circulation Heaters (2 Places)
3⁄8-16 UNC 75⁄8 in.

(Threads (193.7 mm)
(4 Places)
Application: Clean Water 5 ½ in.
NPT
Drain
• Without thermostat 4¼ in.
(108 mm)
# Part Ship Wt. “A” Dim. “B” Dim. “C” Dim.
Description Volts kW Ph Circ. Number Del lbs (kg) in. (mm) in. 6"-150#
(mm) in. (mm) 65⁄8 in. Ref.
(168.3 mm)
FLANGE
60 W/in2 240 30.0 1 3 CFPN715G10XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
Steel Tank NPT Drain
240 30.0 3 5 CFPN715G3XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
15-Alloy 800
Elements 480 30.0 1 3 CFPN715G11XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16 in. Ref. 147⁄16 in. Ref.
(9.3 W/cm2) 480 30.0 3 1 CFPN715G5XS (322.3 mm) (366.7 mm)
M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
240 45.0 1 5 CFPN721G10XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
2½ in.
240 45.0 3 5 CFPN721G3XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432) NPT Inlet
A Ref. and Outlet
480 45.0 1 3 CFPN721G11XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432) B C
480 45.0 3 5 CFPN721G5XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
240 60.0 3 5 CFPN726R3XS M 226 (103) 51 (1294) 31 (787) 271/2 (699)
3½ in.
480 60.0 1 3 CFPN726R11XS M 226 (103) 51 (1294) 31 (787) 271/2 (699) (89 mm)
480 60.0 3 5 CFPN726R5XS M 226 (103) 51 (1294) 31 (787) 271/2 (699) (2 Places)
¾-10 UNC 2B 8¾ in.
240 75.0 3 5 CFPN732G3XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) (Threads (222 mm)
(4 Places)
480 75.0 1 5 CFPN732G11XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) ½ in.
NPT
480 75.0 3 5 CFPN732G5XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) Drain
240 90.0 3 5 CFPN737R3XS M 296 (134) 72 (1827) 52 (1321) 481/2 (1232) 4¾ in.
(121 mm)
480 90.0 3 5 CFPN737R5XS M 296 (134) 72 (1827) 52 (1321) 481/2 (1232)
480 125.0 3 5 CFPN750R5XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)
480 150.0 3 5 CFPN760G5XS M 370 (168) 93 (2361) 73 (1854) 66 (1676)
8 inch - 150 lb ANSI Flange (WATROD) 8"-150#

75⁄8 in.
(193.7 mm)
60 W/in2 240 50.0 3 3 CFRN721N3S M 340 (155) 471/4 (1199.0) 243/4FLANGE
(627.0) 211/4 (538.0)
Steel Tank
480 50.0 1 3 CFRN721N11S M 340 (155) 471/4 (1199.0) 243/4 (627.0) 211/4 (538.0)
18-Alloy 800 ½ in.
Elements 480 50.0 3 2 CFRN721N5S M 340 (155) 471/4 (1199.0) 243/4 (627.0) 211/4 (538.0) NPT Drain
(7.5 W/cm2) 240 75.0 3 6 CFRN729N3S M 360 (164) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
480 75.0 3 2 CFRN729N5S M 360 (164) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) 1411⁄16 in. Ref. 14½ in. Ref.
(373.1 mm) (368 mm)
240 100.0 3 6 CFRN737E3S M 385 (175) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
480 100.0 3 3 CFRN737E5S M 385 (175) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) 2½ in.
A Ref. NPT Inlet
240 125.0 3 6 CFRN745E3S M 410 (186) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) B and Outlet
C
480 125.0 3 6 CFRN745E5S M 410 (186) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 150.0 3 6 CFRN752N5S M 440 (200) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
3½ in.
480 175.0 3 6 CFRN760N5S M 465 (211) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) (89 mm)
(2 Places)
480 200.0 3 6 CFRN768E5S M 510 (232) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) ¾-10 UNC 2B 10¾ in.
(Threads (273 mm)
• M - Manufacturing lead times 5 When steel vessel materials are used in this (4 Places)
application, some rust may be present in the ½ in.
NPT
process media Drain
Truck Shipment only
5¾ in.
(146 mm)
1215⁄16 in.
WATLOW® 10"-150#
FLANGE (328.6 mm) 341
(2) ¾ -10
3 in. UNC 2B
(163.5 mm)
¾ in.
NPT Inlet
and Outlet
A Ref.
B
Circulation Heaters

½ in.
4 in. NPT
(102 mm) Drain
Application: Deionized or Demineralized Water
3¾ in.
# Part Ship Wt. “A” Dim. “B” Dim. “C” Dim. 21/2 inch NPT Screw Plug
21/2 inch NPT Screw Plug (WATROD) 73⁄16 in. Ref.
2 1/2 NPT
60 W/in2 240 6.0 3 1 CBLR714L3S RS 24 (11) 343/4 (881) 221SCREW
/2 (572) 161/2 (419) (182.6 mm) 113⁄16 in.
PLUG (284.2 mm)
316 SS
480 6.0 3 1 CBLR714L5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
Tank 1 in.
3-316 SS 240 7.5 3 1 CBLR717L3S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419) NPT Inlet
and Outlet
Elements 480 7.5 3 1 CBLR717L5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
(9.3 W/cm2)
240 9.0 3 1 CBLR720L3S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419) A Ref.
Passivated B
480 9.0 3 1 CBLR720L5S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419) C
240 12.0 3 1 CBLR726C3S RS 27 (13) 443/4 (1135) 321/2 (1129) 261/2 (673) 1¼ in.
(32 mm)
480 12.0 3 1 CBLR726C5S RS 27 (13) 443/4 (1135) 321/2 (1129) 261/2 (673)
240 15.0 3 1 CBLR731L3S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673)
415⁄16 in.
480 15.0 3 1 CBLR731L5S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) (125.4 mm)
1 Ref.
240 18.0 3 1 CBLR737C3S RS 30 (14) 57 /4 (1453) 45 (1143) 39 (991) ½ in.
480 18.0 3 1 CBLR737C5S RS 30 (14) 571/4 (1453) 45 (1143) 39 (991) 3⁄8-16 UNC 55⁄8 in. NPT Drain
(Threads (142.9 mm)
(4 Places)
31⁄8 in.
4 inch - 150 lb ANSI Flange (WATROD) (79.4 mm)
60 W/in2 240 12.0 1 2 CFOR716A10S M 124 (57) 39 (989) 201/2 (521) 17 (432)
316 SS 43⁄8 in.
240 12.0 3 1 CFOR716A3S M 124 (57) 39 (989) 201/2 (521) 17 (432) (111.1 mm)
Tank
6-316 SS 480 12.0 1 1 CFOR716A11S M 124 (57) 39 (989) 201/2 (521) 17 (432)
Elements 480 12.0 3 1 CFOR716A5S M 124 (57) 39 (989) 201/2 (521) 17 (432) 4 inch - 150 lb ANSI Flange
(9.3 W/cm2)
240 18.0 1 2 CFOR722A10S M 127 (58) 39 (989) 201/2 (521)
4"-150# 17 (432) 3⁄8 in.
5413⁄16 in.
Passivated FLANGE (147.6 mm)
(111.1 mm)
240 18.0 3 1 CFOR722A3S M 127 (58) 39 (989) 201/2 (521)3"-150#
17 (432)
FLANGE
480 18.0 1 1 CFOR722A11S M 127 (58) 39 (989) 201/2 (521) 17 (432)
½ in.
in.
480 18.0 3 1 CFOR722A5S M 127 (58) 39 (989) 201/2 (521) 17 (432) NPT
NPT Drain
Drain
240 24.0 1 2 CFOR727J10S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699)
240 24.0 3 2 CFOR727J3S M 160 (73) 491/2 (1256) 31 11⁄16 in. 12
(787) 271/2 (699) 7(195.3 5⁄8 in. Ref.
Ref. 143⁄8 in. Ref.
(320.7 mm)
mm) 11½ in. Ref.
(365.1 mm)
480 24.0 1 1 CFOR727J11S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699) (292 mm)
11in.
½ in.
480 24.0 3 1 CFOR727J5S M 160 (73) 491/2 (1256) 31 (787) 271/2 (699)
A Ref. NPTNPTInlet
Inlet
240 30.0 3 2 CFOR733A3S M 163 (74) 491/2 (1256) 31 A Ref.
(787) 271/2 (699) &and
Outlet
Outlet
B B CC
480 30.0 1 2 CFOR733A11S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699)
480 30.0 3 1 CFOR733A5S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) 1¼ 1¼in.in.
(32(32mm)
mm)
240 36.0 3 2 CFOR738J3S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) (2 (2
Places)
Places)
3⁄8-16 UNC 5⁄8in.
565⁄8 in.Ref.
480 36.0 1 2 CFOR738J11S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232)3⁄8-16 UNC
(Threads (168.3
(142.9mm) mm)
(Threads
(4 Places)
480 36.0 3 1 CFOR738J5S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) (4 Places) ½ in.
311⁄16 in. NPT
½ in.
Drain
480 50.0 3 2 CFOR751J5S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) 31⁄8 (93.7 mm)
in. Dia. NPT
480 60.0 3 2 CFOR761A5S M 297 (135) 911/2 (2326) 73 (1854) 66 (1676)
RAPID SHIP
Truck Shipment only
5"-150# 59⁄16 in. Ref.
FLANGE (141.3 mm)
• RS - Next day shipment ½ in.

up to 5 pieces NPT Drain
• M - Manufacturing lead times
125⁄8 in. Ref.
(320.7 mm)
C
2 in.
342 NPT Inlet
and Outlet
WATLOW®
A Ref. 25 in.
B
(635 mm)
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C

2 in.
NPT Inlet
and Outlet
25 in.
B
(635 mm)

(32 mm)
Circulation Heaters (2 Places) ®
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
(4 Places)
Application: Deionized or Demineralized Water ½ in.
NPT
Drain
(108 mm)
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. 6"-150#
(168.3 mm)
6 inch - 150 lb ANSI Flange (WATROD) FLANGE
60 W/in2 240 24.0 1 3 CFPR715N10S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
316 SS Tank 240 24.0 3 2 CFPR715N3S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) NPT Drain
12-316 SS
Elements 480 24.0 1 2 CFPR715N11S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432)
1211⁄16 in. Ref. 147⁄16 in. Ref.
(9.3 W/cm2) 480 24.0 3 1 CFPR715N5S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) (322.3 mm) (366.7 mm)
Passivated 240 36.0 1 4 CFPR721N10S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
240 36.0 3 2 CFPR721N3S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) 2½ in.
NPT Inlet
480 36.0 1 2 CFPR721N11S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) A Ref. and Outlet
B C
480 36.0 3 1 CFPR721N5S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
240 48.0 3 4 CFPR727E3S M 222 (101) 51 (1294) 31 (787) 271/2 (699)
480 48.0 1 3 CFPR727E11S M 222 (101) 51 (1294) 31 (787) 271/2 (699)
3½ in.
480 48.0 3 2 CFPR727E5S M 222 (101) 51 (1294) 31 (787) 271/2 (699) (89 mm)
(2 Places)
240 60.0 3 4 CFPR732N3S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
¾-10 UNC 2B 8¾ in.
480 60.0 1 3 CFPR732N11S M 226 (103) 51 (1294) 31 (787) 271/2 (699) (Threads (222 mm)
(4 Places)
480 60.0 3 2 CFPR732N5S M 226 (103) 51 (1294) 31 (787) 271/2 (699) ½ in.
NPT
240 72.0 3 4 CFPR738E3S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) Drain
480 72.0 3 2 CFPR738E5S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) 4¾ in.
(121 mm)
480 100.0 3 4 CFPR751E5S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 120.0 3 4 CFPR760N5S M 360 (164) 93 (2361) 73 (1854) 66 (1676)

60 W/in2 240 30.0 1 3 CFPR715N10XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
316 SS Tank 240 30.0 3 5 CFPR715N3XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
15-316 SS
Elements 480 30.0 1 3 CFPR715N11XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
(9.3 W/cm2) 480 30.0 3 1 CFPR715N5XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
Passivated 240 45.0 1 5 CFPR721N10XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
240 45.0 3 5 CFPR721N3XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
480 45.0 1 3 CFPR721N11XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
480 45.0 3 5 CFPR721N5XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
240 60.0 3 5 CFPR727E3XS M 226 (103) 51 (1294) 31 (787) 271/2 (699)
480 60.0 1 3 CFPR727E11XS M 226 (103) 51 (1294) 31 (787) 271/2 (699)
480 60.0 3 5 CFPR727E5XS M 226 (103) 51 (1294) 31 (787) 271/2 (699)
240 75.0 3 5 CFPR732N3XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
480 75.0 1 5 CFPR732N11XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
480 75.0 3 5 CFPR732N5XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
240 90.0 3 5 CFPR738E3XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
480 90.0 3 5 CFPR738E5XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
480 125.0 3 5 CFPR751E5XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)
480 150.0 3 5 CFPR760N5XS M 370 (168) 93 (2361) 73 (1854) 66 (1676)
• M - Manufacturing lead times Truck Shipment only
WATLOW® 343
Circulation Heaters

Application: Process Water 5

# Part Ship Wt. “A” Dim. “B” Dim. 11/4 inch NPT Screw Plug
1 1/4 NPT“C” Dim.
SCREWin.PLUG (mm)
11/4 inch NPT Screw Plug (FIREBAR) 1 1/4 NPT
67⁄16 in. Ref.
SCREW PLUG
45 W/in2 8 240 2.0 3 1 CBDNF13A27S M 25 (12) 245/8 (625.5) 15 (381) 31/8 (79.4) (163.5 mm)
Steel Tank 240 2.5 3 5 1 67⁄16 in. Ref.
1 CBDNF15J27S M 26 (12) 24 /8 (625.5) 15 (381) 3 /8 (79.4) (163.5 mm)
1-Alloy 800 5/8 (828.7) 23 1/8 (79.4)
Element 240 3.0 3 1 CBDNF18A27S M 30 (14) 32 (584) 3
¾ in.
(7 W/cm2) 240 4.0 3 1 CBDNF22J27S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) NPT Inlet
480 4.0 3 1 CBDNF22J28S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) ¾
and
in.Outlet
NPT Inlet A Ref.
240 5.0 3 1 CBDNF27J27S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) and Outlet
B A Ref.
480 5.0 3 1 CBDNF27J28S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) B
240 6.0 3 1 CBDNF32J27S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
480 6.0 3 1 CBDNF32J28S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
240 8.0 3 1 CBDNF42A27S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
480 8.0 3 1 CBDNF42A28S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) C Ref.
240 10.0 3 1 CBDNF51J27S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1) C Ref.
½ in.
480 10.0 3 1 CBDNF51J28S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1) 4 in. ½ in.NPT
4(102
in. mm) NPTDrain
(102 mm) Drain
48 W/in2 8 240 6.0 3 1 CBLN717G3S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
Steel Tank 480 6.0 3 1 CBLN717G5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419) 3¾ in.
3-Alloy 800 3¾ in.mm)
(95
Elements 240 7.5 3 1 CBLN719R3S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419) (95 mm)
(7.5 W/cm2) 480 7.5 3 1 CBLN719R5S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419)
240 9.0 3 1 CBLN724R3S RS 27 (13) 343/4 (881) 221/2 (572) 161/2 (419) 21/2 inch NPT Screw Plug
480 9.0 3 1 CBLN724R5S RS 27 (13) 343/4 (881) 221/2 (572) 161/2 (419)
240 12.0 3 1 CBLN732G3S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) 73⁄16
2 1/2 NPT 73⁄16 in. in. Ref.
Ref.
480 12.0 3 1 CBLN732G5S RS 29 (14) 443/4 (1135) 321/2SCREW
2 1/2 NPT 261/2 (673)
(1129) (182.6
(182.6 mm) mm) 3⁄16 in.
11in.
PLUG 113⁄16
SCREW PLUG (284.2
(284.2 mm)mm)
240 15.0 3 1 CBLN739R3S RS 31 (14) 571/4 (1453) 45 (1143) 39 (991)
1 in.
1 in.
480 15.0 3 1 CBLN739R5S RS 31 (14) 571/4 (1453) 45 (1143) 39 (991) NPT
NPT Inlet
Inlet
240 18.0 3 1 CBLN747G3S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991) and
and Outlet
Outlet
480 18.0 3 1 CBLN747G5S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991)

A Ref.
A Ref.
BB C C
21/2 inch NPT Screw Plug (FIREBAR)
45 W/in2 8 240 6.0 3 1 CBLNF12A27S M 21 (10) 343/4 (881) 221/2 (572) 161/2 (419) 1¼ in.
1¼ in.
(32 mm)
(32 mm)
Steel Tank 240 7.5 3 1 CBLNF14J27S M 22 (10) 343/4 (881) 221/2 (572) 161/2 (419)
3-Alloy 800
Elements 240 9.0 3 1 CBLNF17A27S M 23 (11) 343/4 (881) 221/2 (572) 161/2 (419)
415⁄16 in. in.
415⁄16
(7 W/cm )2 240 12.0 3 1 CBLNF21J27S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) (125.4 mm)
(125.4 mm)Ref.
480 12.0 3 1 CBLNF21J28S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) Ref.
½ in.
½ in.
NPT Drain
240 15.0 3 1 CBLNF26J27S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) 3⁄8-16 UNC 55⁄8 in. NPT Drain
3⁄8-16 UNC 5 5⁄8
(142.9 mm) in.
(Threads (142.9 mm)
480 15.0 3 1 CBLNF26J28S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) (4 Places)
(Threads
(4 Places) 31⁄8 in.
240 18.0 3 1 CBLNF31J27S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) 31⁄8 in.
(79.4 mm)
(79.4 mm)
480 18.0 3 1 CBLNF31J28S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673)
480 24.0 3 1 CBLNF41A28S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) 43⁄8 in.
3⁄8 in.
(111.14mm)
480 30.0 3 1 CBLNF50J28S M 52 (24) 633/4 (1618) 511/2 (1308) 461/2 (1181) (111.1 mm)
RAPID SHIP
43⁄8 in.
• RS - Next day shipment • M - Manufacturing lead times process media
(111.1 4mm)
up to 5 pieces 3"-150# 3⁄8 in.
8 Can be wired for 1-phase operation (111.1 mm)
FLANGE
3"-150#
344 FLANGE WATLOW®
½ in.
NPT Drain
½ in.
73⁄16 in. Ref.
2 1/2 NPT (182.6 mm) 113⁄16 in.
1 in.
NPT Inlet
and Outlet
Circulation Heaters B C
A Ref.
1¼ in.
(32 mm)

Circulation Heaters 415⁄16 in.
(125.4 mm)
®
Ref.
½ in.
3⁄8-16 UNC
(142.9 mm)
Application: Process Water 5 (Threads
(4 Places)
31⁄8 in.
• WATROD or FIREBAR elements (79.4 mm)
• Without thermostat 43⁄8 in.

• General purpose enclosure (111.1 mm)
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm) in. (mm) 43⁄8 in.
3"-150#
48 W/in2 240 6.0 1 1 CFMN718A10S RS 68 (31) 351/4 (894) 221/2 (573) 161/FLANGE
2 (419)
Steel Tank 240 6.0 3 1 CFMN718A3S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419) ½ in.
3-Alloy 800 480 6.0 1 1 CFMN718A11S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419) NPT Drain
Elements 480 6.0 3 1 CFMN718A5S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419)
(7.5 W/cm2) 240 7.5 1 1 CFMN720J10S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) 711⁄16 in. Ref.
(195.3 mm) 11½ in. Ref.
240 7.5 3 1 CFMN720J3S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) (292 mm)
480 7.5 1 1 CFMN720J11S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) 1 in.
480 7.5 3 1 CFMN720J5S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) NPT Inlet
A Ref. & Outlet
240 9.0 1 1 CFMN725J10S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) B C
240 9.0 3 1 CFMN725J3S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673)
480 9.0 1 1 CFMN725J11S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) 1¼ in.
(32 mm)
480 9.0 3 1 CFMN725J5S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) (2 Places)
240 12.0 3 1 CFMN733A3S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) 3⁄8-16 UNC 55⁄8 in. Ref.
(Threads (142.9 mm)
480 12.0 1 1 CFMN733A11S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) (4 Places)
480 12.0 3 1 CFMN733A5S M 96 (44) 451/4 (1148) 321/2 826) 261/2 (673) ½ in.
240 15.0 3 1 CFMN740J3S M 100 (46) 573/4 (1465) 45 (1143) 39 (991) 31⁄8 in. Dia. NPT
480 15.0 1 1 CFMN740J11S M 100 (46) 573/4 (1465) 45 (1143) 39 (991)
480 15.0 3 1 CFMN740J5S M 100 (46) 573/4 (1465) 45 (1143) 39 (991)
240 18.0 3 1 CFMN748A3S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
480 18.0 1 1 CFMN748A11S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
480 18.0 3 1 CFMN748A5S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
4 inch - 150 lb ANSI Flange (WATROD) 4 inch - 150 lb ANSI Flange

48 W/in2 240 9.0 1 1 CFON713J10S M 122 (56) 39 (989) 201/2 (521) 17 (432) 513⁄16 in.
4"-150#
Steel Tank 240 9.0 3 1 CFON713J3S M 122 (56) 39 (989) 201/2 (521)
FLANGE 17 (432) (147.6 mm)
6-Alloy 800 480 9.0 1 1 CFON713J11S M 122 (56) 39 1
(989) 20 /2 (521) 17 (432)
Elements 480 9.0 3 1 CFON713J5S M 122 (56) 39 (989) 201/2 (521) 17 (432)
(7.5 W/cm2) 240 12.0 1 2 CFON718A10S M 125 (57) 39 (989) 201/2 (521) 17 (432) ½ in.
NPT Drain
240 12.0 3 1 CFON718A3S M 125 (57) 39 (989) 201/2 (521) 17 (432)
480 12.0 1 1 CFON718A11S M 125 (57) 39 (989) 201/2 (521) 17 (432)
125⁄8 in. Ref. 143⁄8 in. Ref.
480 12.0 3 1 CFON718A5S M 125 (57) 39 (989) 201/2 (521) 17 (432) (320.7 mm) (365.1 mm)
240 15.0 1 2 CFON720J10S M 127 (58) 39 (989) 201/2 (521) 17 (432)
240 15.0 3 1 CFON720J3S M 127 (58) 39 1
(989) 20 /2 (521) 17 (432) 1½ in.
480 15.0 1 1 CFON720J11S M 127 (58) 39 (989) 201/2 (521) 17 (432) A Ref. NPT Inlet
1 and Outlet
480 15.0 3 1 CFON720J5S M 127 (58) 39 (989) 20 /2 (521) 17 (432) B C
240 18.0 1 2 CFON725J10S M 160 (73) 39 (989) 201/2 (521) 17 (432)
240 18.0 3 1 CFON725J3S M 160 (73) 39 (989) 201/2 (521) 17 (432) 1¼ in.
480 18.0 1 1 CFON725J11S M 160 (73) 39 (989) 201/2 (521) 17 (432) (32 mm)
1 (2 Places)
480 18.0 3 1 CFON725J5S M 160 (73) 39 (989) 20 /2 (521) 17 (432) 3⁄8-16 UNC 65⁄8 in.
240 24.0 1 2 CFON733A10S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) (Threads (168.3 mm)
1 1 (4 Places)
240 24.0 3 2 CFON733A3S M 163 (74) 49 /2 (1256) 31 (787) 27 /2 (699) ½ in.
311⁄16 in. NPT
480 24.0 1 1 CFON733A11S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) (93.7 mm) Drain
480 24.0 3 1 CFON733A5S M 163 1
(74) 49 /2 (1256) 31 1
(787) 27 /2 (699)
240 30.0 3 2 CFON740J3S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232)
480 30.0 1 2 CFON740J11S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) 59⁄16 in. Ref.
5"-150#
480 30.0 3 1 CFON740J5S M 229 (104) 701/2 (1789) 52 (1321) 48 1/2 (1232)
FLANGE (141.3 mm)
240 36.0 3 2 CFON748A3S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232)
½ in.
480 36.0 1 2 CFON748A11S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) NPT Drain
480 36.0 3 1 CFON748A5S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232)
RAPID SHIP
125⁄8 in. Ref.
application, some rust may be present in the (320.7 mm)
C
• RS - Next day shipment • M - Manufacturing lead times process media
up to 2 pieces Truck Shipment only 2 in.
WATLOW® A Ref.
NPT Inlet
and Outlet
345
25 in.
B
(635 mm)
Circulation Heaters


4"-150#
in. (mm) 513⁄16 in.
(147.6 mm)
4 inch - 150 lb ANSI Flange (FIREBAR) FLANGE
4"-150# 513⁄16 in.
45 W/in2 240 12.0 3 1 CFONF13G27S M 125 (57) 39 (989) 201/2 (521) 17 (432) (147.6 mm)
FLANGE
Steel Tank ½ in.
240 15.0 3 1 CFONF16A27S M 128 (58) 39 (989) 201/2 (521) 17 (432)
Elements 240 18.0 3 1 CFONF18G27S M 130 (59) 39 (989) 201/2 (521) 17 (432)
½ in.
(7 W/cm2) 240 24.0 3 2 CFONF22R27S M 133 (61) 39 (989) 201/2 (521) 17 (432) 125⁄8 in. Ref. NPT Drain
143⁄8 in. Ref.
(320.7 mm) (365.1 mm)
480 24.0 3 1 CFONF22R28S M 133 (61) 39 (989) 201/2 (521) 17 (432)
240 30.0 3 2 CFONF27R27S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) 125⁄8 in. Ref. 143⁄8 in. Ref.
1½ in.
(320.7 mm)
A Ref. NPT Inlet (365.1 mm)
480 30.0 3 1 CFONF27R28S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) and Outlet
B C
240 36.0 3 2 CFONF32R27S M 170 (78) 491/2 (1256) 31 (787) 271/2 (699) 1½ in.
A Ref. NPT Inlet
480 36.0 3 1 CFONF32R28S M 170 (78) 491/2 (1256) 31 (787) 271/2 (699) and Outlet 1¼ in. C
B
480 48.0 3 2 CFONF42G28S M 236 (107) 701/2 (1789) 52 (1321) 481/2 (1232) (32 mm)
(2 Places)
480 60.0 3 2 CFONF51R28S M 240 (109) 701/2 (1789) 52 (1321) 481/2 (1232) 3⁄8(Threads
-16 UNC 65⁄8 in.
(168.3 mm)1¼ in.
(4 Places)
½ in.(32 mm)
311⁄16 in. NPT (2 Places)
5 inch - 150 lb ANSI Flange (WATROD) 3⁄8-16(93.7
UNCmm) 65⁄8 in.
Drain
(Threads (168.3 mm)
48 W/in2 240 24.0 1 3 CFNN733A10S M 145 (66) 491/4 (1249) 30 (762) 147/8 (377.8) (4 Places)
Steel Tank ½ in.
240 24.0 3 2 CFNN733A3S M 145 (66) 491/4 (1249) 30 (762) 147/8 (377.8) 311⁄16 in. NPT
6-Alloy 800 5"-150# (93.7 mm) 59⁄16 in. Ref.Drain
Elements 480 24.0 1 2 CFNN733A11S M 145 (66) 491/4 (1249) 30 (762) 14 7/8 (377.8)
FLANGE (141.3 mm)
(7.5 W/cm2) 480 24.0 3 1 CFNN733A5S M 145 (66) 491/4 (1249) 30 (762) 147/8 (377.8) 5 inch - 150 lb ANSI Flange
½ in.
NPT Drain
240 30.0 3 2 CFNN740J3S M 167 (76) 561/4 (1427) 37 (940) 18 5/8 (473.1)
5"-150# 59⁄16 in. Ref.
(141.3 mm)
480 30.0 1 2 CFNN740J11S M 167 (76) 561/4 (1427) 37 (940) 18 5/8 (473.1)
FLANGE
125⁄8 in. Ref.
480 30.0 3 1 CFNN740J5S M 167 (76) 561/4 (1427) 37 (940) 185/8 (473.1) (320.7 mm) ½ in.
C
NPT Drain
240 36.0 3 2 CFNN748A3S M 180 (82) 673/4 (1719) 481/2 (1232) 25 (633.0)
2 in.
480 36.0 1 2 CFNN748A11S M 180 (82) 673/4 (1719) 481/2 (1232) 25 (633.0) NPT Inlet
5⁄8 in.
A Ref. 12and Ref.
Outlet
480 36.0 3 1 CFNN748A5S M 180 (82) 673/4 (1719) 481/2 (1232) 25 (633.0) B(320.7 mm)
25 in.
(635 mm) C
2 in. 1¼ in.
5 inch - 150 lb ANSI Flange (WATROD) NPT Inlet (32 mm)
48 W/in2 and Outlet (2 Places)
240 36.0 3 3 CFNN733A3XS M 150 (68) 491/4 (1249) 30 (762) 147/8 (377.8) A Ref. 25 in.
Steel Tank B
480 36.0 1 3 CFNN733A11XS M 150 (68) 491/4 (1249) 30 (762) 147/8 (377.8) 3⁄8-16 UNC 75⁄8 in. (635 mm)
9-Alloy 800 (Threads (193.7 mm)
Elements 480 36.0 3 1 CFNN733A5XS M 150 (68) 491/4 (1249) 30 (762) 147/8 (377.8) (4 Places)
½ in.1¼ in.
(7.5 W/cm2) NPT(32 mm)
240 45.0 3 3 CFNN740J3XS M 173 (79) 561/4 (1427) 37 (940) 185/8 (473.1) (2 Places)
Drain
480 45.0 1 3 CFNN740J11XS M 173 (79) 561/4 (1427) 37 (940) 185/8 (473.1) 4¼ in.
3⁄8-16 UNC
(108 mm) 75⁄8 in.
480 45.0 3 3 CFNN740J5XS M 173 (79) 561/4 (1427) 37 (940) 185/8 (473.1) (Threads (193.7 mm)
(4 Places)
240 54.0 3 3 CFNN748A3XS M 188 (86) 673/4 (1719) 481/2 (1232) 25 (633.0) ½ in.
NPT
480 54.0 1 3 CFNN748A11XS M 188 (86) 673/4 (1719) 481/2 (1232) 25 (633.0) Drain
65⁄8 in. Ref.
6"-150#
480 54.0 3 3 CFNN748A5XS M 188 (86) 673/4 (1719) 481/2 (1232)
FLANGE
25 (633.0) 4¼ in. (168.3 mm)
(108 mm)
• M - Manufacturing lead times 5 When steel vessel materials are used in this ½ in.
application, some rust may be present in the NPT Drain
process media
Truck Shipment only 1211⁄16 in. Ref. 65⁄8
14 7⁄16in.in.Ref.
Ref.
6"-150# (322.3 mm) (168.3
(366.7mm) mm)
FLANGE
2½ in. ½ in.
NPT Inlet NPT Drain
A Ref. and Outlet
B C
346 1211⁄16 in. Ref. WATLOW ®
147⁄16 in. Ref.
(322.3 mm) (366.7 mm)
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C
Circulation Heaters
2 in.
NPT Inlet
A Ref. and Outlet
25 in.
B
(635 mm)

1¼ in.
(32 mm)
Circulation Heaters
(2 Places) ®
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
(4 Places)
½ in.
NPT
Drain
4¼ in.
FLANGE
48 W/in2 240 18.0 1 2 CFPN713G10S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 240 18.0 3 1 CFPN713G3S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
NPT Drain
12-Alloy 800 480 18.0 1 1 CFPN713G11S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432)
Elements 480 18.0 3 1 CFPN713G5S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432)
(7.5 W/cm2) 240 24.0 1 1211⁄16 in. Ref. 147⁄16 in. Ref.
3 CFPN717R10S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432) (322.3 mm) (366.7 mm)
240 24.0 3 2 CFPN717R3S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432)
480 24.0 1 2 CFPN717R11S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432)
2½ in.
480 24.0 3 1 CFPN717R5S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432) NPT Inlet
240 30.0 1 3 CFPN720G10S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) A Ref. and Outlet
B C
240 30.0 3 2 CFPN720G3S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
480 30.0 1 2 CFPN720G11S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
480 30.0 3 1 CFPN720G5S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
240 36.0 1 4 CFPN725G10S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) 3½ in.
240 36.0 3 2 CFPN725G3S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) (89 mm)
(2 Places)
480 36.0 1 2 CFPN725G11S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) ¾-10 UNC 2B 8¾ in.
480 36.0 3 1 CFPN725G5S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) (Threads (222 mm)
240 48.0 3 4 CFPN732R3S M 226 (103) 51 (1294) 31 (787) 271/2 (699) (4 Places) ½ in.
480 48.0 1 3 CFPN732R11S M 226 (103) 51 (1294) 31 (787) 271/2 (699) NPT
Drain
480 48.0 3 2 CFPN732R5S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
4¾ in.
240 60.0 3 4 CFPN740G3S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) (121 mm)
480 60.0 1 3 CFPN740G11S M 290 (132) 72 (1827) 52 1
(1321) 48 /2 (1232)
480 60.0 3 2 CFPN740G5S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232)
240 72.0 3 4 CFPN747R3S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 72.0 3 2 CFPN747R5S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)

48 W/in2 240 23.0 1 3 CFPN713G10XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 240 23.0 3 5 CFPN713G3XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
15-Alloy 800 480 23.0 1 1 CFPN713G11XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
Elements 480 23.0 3 1 CFPN713G5XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
(7.5 W/cm2) 240 30.0 1 3 CFPN717R10XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
240 30.0 3 5 CFPN717R3XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
480 30.0 1 3 CFPN717R11XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
480 30.0 3 1 CFPN717R5XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
240 38.0 1 5 CFPN720G10XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
240 38.0 3 5 CFPN720G3XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
480 38.0 1 3 CFPN720G11XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
480 38.0 3 1 CFPN720G5XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
240 45.0 1 5 CFPN725G10XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
240 45.0 3 5 CFPN725G3XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
480 45.0 1 3 CFPN725G11XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
480 45.0 3 5 CFPN725G5XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
240 60.0 3 5 CFPN732R3XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
480 60.0 1 3 CFPN732R11XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
480 60.0 3 5 CFPN732R5XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
240 75.0 3 5 CFPN740G3XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
480 75.0 1 5 CFPN740G11XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
480 75.0 3 5 CFPN740G5XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
240 90.0 3 5 CFPN747R3XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)
480 90.0 3 5 CFPN747R5XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)
• M - Manufacturing lead times Truck Shipment only 5 When steel vessel materials are used in this
process media
WATLOW® 347
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C

2 in.
NPT Inlet
and Outlet
25 in.
B
(635 mm)

(32 mm)
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
(4 Places)
Application: Process Water 5 ½ in.
NPT
Drain
(108 mm)
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm) in. (mm) 65⁄8 in. Ref.
6"-150#
(168.3 mm)
45 W/in2 240 30.0 3 5 CFPNF13G27S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 240 37.5 3 ½ in.
5 CFPNF16A27S M 220 (100) 401/2 (1027) 201/2 (521) 17 (432) NPT Drain
15-Alloy 800
Elements 240 45.0 3 5 CFPNF18G27S M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
(7 W/cm2) 240 60.0 3 5 CFPNF22R27S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16 in. Ref. 147⁄16 in. Ref.
(322.3 mm) (366.7 mm)
480 60.0 3 5 CFPNF22R28S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
240 75.0 3 5 CFPNF27R27S M 232 (106) 51 (1294) 31 (787) 271/2 (699) 2½ in.
480 75.0 3 5 CFPNF27R28S M 232 (106) 51 (1294) 31 (787) 271/2 (699) NPT Inlet
A Ref. and Outlet
240 90.0 3 5 CFPNF32R27S M 236 (107) 51 (1294) 31 (787) 271/2 (699) B C
480 90.0 3 5 CFPNF32R28S M 236 (107) 51 (1294) 31 (787) 271/2 (699)

480 120.0 3 5 CFPNF42G28S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
3½ in.
480 150.0 3 5 CFPNF51R28S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232) (89 mm)
(2 Places)
¾-10 UNC 2B 8¾ in.
8 inch - 150 lb ANSI Flange (WATROD) (Threads (222 mm)
48 W/in2 (4 Places)
240 50.0 3 3 CFRN725N3S M 350 (159) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) ½ in.
Steel Tank 480 50.0 1 3 CFRN725N11S M 350 (159) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) NPT
18-Alloy 800 Drain
Elements 480 50.0 3 2 CFRN725N5S M 350 (159) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) 4¾ in.
(121 mm)
(7.5 W/cm2) 240 75.0 3 6 CFRN735N3S M 380 (173) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
480 75.0 3 2 CFRN735N5S M 380 (173) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
240 100.0 3 6 CFRN744E3S M 410 (186) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 100.0 3 3 CFRN744E5S M 410 (186) 697/8 (1774.8) 4738"-150#
/8 (1203.3) 437/8 (1114.4) 75⁄8 in.
(193.7 mm)
240 125.0 3 6 CFRN754M3S M 445 (202) 79 /8 (2016.1) 56 /8 (1444.6) 533/8 (1355.7)
3 7FLANGE
480 125.0 3 6 CFRN754M5S M 445 (202) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
½ in.
480 150.0 3 6 CFRN763M5S M 490 (223) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) NPT Drain
480 175.0 3 6 CFRN773D5S M 530 (241) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
480 200.0 3 6 CFRN782M5S M 560 (254) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) 1411⁄16 in. Ref. 14½ in. Ref.
(373.1 mm) (368 mm)

2½ in.
48 W/in2 240 67.0 3 4 CFRN726D3XS M 358 (163) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) A Ref. NPT Inlet C
Steel Tank 480 67.0 1 3 CFRN726D11XS M 358 (163) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
B and Outlet
24-Alloy 800
Elements 480 67.0 3 2 CFRN726D5XS M 358 (163) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
240 100.0 3 8 CFRN736D3XS M 392 (178) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) 3½ in.
(7.5 W/cm2) (89 mm)
480 100.0 3 4 CFRN736D5XS M 392 (178) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) (2 Places)
¾-10 UNC 2B 10¾ in.
240 133.0 3 8 CFRN744M3XS M 425 (193) 697/8 (1774.8) 473⁄8 (1203.3) 437/8 (1114.4) (Threads (273 mm)
(4 Places)
480 133.0 3 4 CFRN744M5XS M 425 (193) 697/8 (1774.8) 473⁄8 (1203.3) 437/8 (1114.4) ½ in.
240 167.0 3 8 CFRN754M3XS M 463 (210) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) NPT
Drain
480 167.0 3 8 CFRN754M5XS M 463 (210) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
480 200.0 3 8 CFRN763M5XS M 511 (232) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) 5¾ in.
(146 mm)
480 233.0 3 8 CFRN773D5XS M 554 (252) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
480 267.0 3 8 CFRN782M5XS M 587 (267) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
process media
10"-150# 1215⁄16 in.
Truck Shipment only FLANGE (328.6 mm)
(2) ¾ -10
3 in. UNC 2B
348 Flange
Inlet &
WATLOW ®
Holes
Outlet
11½ in.
Circulation Heaters

• WATROD or FIREBAR elements 14 in.

(356 mm)
• Without thermostat 12"-150#
FLANGE (2) ¾ -10
• General purpose enclosure UNC 2B
Holes
# Part Ship Wt. “A” Dim. “B” Dim. 5 in. Flange
“C” Inlet
Dim. & Outlet
Description Volts kW Ph Circ.
75⁄8 in.
Number Del. lbs (kg) in. (mm) in. (mm) in. (mm)
(193.7(WATROD)
mm)
91⁄16 in. Ref.
48 W/in2 8 480 262.0 3 9 CFSN773E5S M 600 (273) 1065/8 (2708.3) 907/8 (2308.2) 975/16 (2471.7)
163⁄16 in. Ref. (230.2 mm)
(411.2 mm)
Steel Tank ½ in.
½ in.
Elements NPT Drain
(7.5 W/cm2)
1411⁄16 in. Ref. 14½ in. Ref.
(373.1 mm) (368 mm) A Ref.
C
12 inch, 150 lb ANSI Flange (WATROD) B
48A W/in
2½ in.
480
Ref. 2 NPT Inlet 350.0 3
C
7
12 CFTN773C5S M 650 (295) 1061/2 (2705) 903/8 (2295.5) 971/8 (2467.0)
B and Outlet
Steel Tank ½ in.
36-Alloy 800 (13 mm)
Elements
3½ in. 147⁄8 in.
(7.5 W/cm2) (89 mm) (377.8 mm)
(2 Places) 7⁄8 in. (22.2 mm) X
¾-10 UNC 2B 10¾ in. 2 in. (51 mm) Slot
14 (Threads
inch - 150 lb ANSI Flange
(273(WATROD)
mm)
(4 Places)
4
48 W/in2 480 315.0 3 15½ CFWN754J5S
in. M 600 (273) 831/4 (2115) 67 (1700) 7311/16 (1871.7)
Steel Tank 480 375.0 3 NPT
CFWN763J5S
15 Drain M 650 (295) 903/4 (2305) 741/2 (1891) 813/16 (2062.2)
12½ in.
45-Alloy 800 (318 mm)
Elements 5¾ in.
(7.5 W/cm(146
2
) mm)
• M - Manufacturing lead times 5 When steel vessel materials are used in this application,
some rust may be present in the process media
Truck Shipment only
8 Can be wired for 1-phase operation
10 inch - 150 lb ANSI Flange 12 inch - 150 lb ANSI Flange 14 inch - 150 lb ANSI Flange
15 in.
14 in. (381 mm)
0"-150# 1215⁄16 in. (356 mm)
ANGE (328.6 mm) 12"-150# 14"-150#
FLANGE
(2) ¾ -10 (2) ¾ -10
FLANGE (2) ¾ -10
3 in. UNC 2B UNC 2B UNC 2B
Flange Holes Holes
Holes
Inlet & 5 in. Flange 6 in. Flange
Outlet Inlet & Outlet Inlet & Outlet
11½ in.
(292 mm) 11½ in.
9 in. Ref. 91⁄16 in. Ref. (292 mm)
15¾ in. Ref. (229 mm) 163⁄16 in. Ref. (230.2 mm) 9¼ in. Ref.
(400 mm) (411.2 mm) 165⁄16 in. Ref. (235 mm)
(414.3 mm)
½ in.
NPT Drain
½ in.
NPT Drain 9 ½ in.
A Ref.
C A Ref.
8 NPT Drain
A Ref.
B C
B C
B
½ in.
(13 mm) ½ in. 3½ in.
(13 mm) (89 mm)
½ in.
(13 mm)
127⁄8 in.
(327 mm) 147⁄8 in.
7⁄8 in. (22.2 mm) X (377.8 mm) 161⁄8 in.
2 in. (51 mm) Slot 7⁄8 in. (22.2 mm) X (410 mm) 7⁄8 in. (22.2 mm) X
2 in. (51 mm) Slot 2 in. (51 mm) Slot
4
4 4
12½ in. 12½ in.

(318 mm) 12½ in.
(318 mm) (318 mm)
WATLOW® 349
Circulation Heaters

Application: Forced Air and Caustic Solutions

1
1 1/4 NPT
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. 1(mm)
1/4 NPT in. (mm)
SCREWPLUG
SCREW PLUG
67⁄16
67⁄16 in. in.
Ref.Ref.
23 W/in2 4 120/240 1.0 1 1 CBEN13G6S RS 21 (10) 245/8 (625.5) 15 (381) 31/8 (79.4) (163.5 mm)
(163.5 mm)
Steel Tank
120/240 1.5 1 1 CBEN19A6S RS 29 (14) 245/8 (625.5) 15 (381) 31/8 (79.4)
2-Alloy 800
Elements 120/240 2.0 1 1 CBEN24G6S RS 29 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
(3.6 W/cm2) ¾ in.
¾ in.
NPT
NPT Inlet
Inlet
and Outlet
and Outlet
A Ref.
A Ref.
21/2 inch NPT Screw Plug (WATROD) BB
23 W/in2 240 3.0 3 1 CBLNA17G3S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
Steel Tank
480 3.0 3 1 CBLNA17G5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
3-Alloy 800
Elements 240 4.5 3 1 CBLNA24R3S RS 27 (13) 443/4 (1135) 321/2 (1129) 261/2 (673)
(3.6 W/cm2) 480 4.5 3 1 CBLNA24R5S RS 27 (13) 443/4 (1135) 321/2 (1129) 261/2 (673)
C Ref.
240 6.0 3 1 CBLNA32G3S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) C Ref.
480 6.0 3 1 CBLNA32G5S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) ½ in.
4 in. NPT½ in.
240 7.5 3 1 CBLNA39R3S RS 31 (14) 571/4 (1453) 45 (1143) 39 (991) 4 in. Drain
(102 mm) NPT
(102 mm) Drain
480 7.5 3 1 CBLNA39R5S RS 31 (14) 571/4 (1453) 45 (1143) 39 (991)
240 9.0 3 1 CBLNA47G3S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991)
480 9.0 3 1 CBLNA47G5S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991) 3¾ in.
(95 mm)
3¾ in.
RAPID SHIP
4 Wired for higher voltage (95 mm)
• RS - Next day shipment 21/2 inch NPT Screw Plug

up to 5 pieces
73⁄16 in. Ref.
2 1/2 NPT (182.6 mm)
73⁄16 in. Ref. 113⁄16 in.
2 1/2 NPT (182.6 mm) 113⁄16 in.
SCREW PLUG 1 in. (284.2 mm)
NPT Inlet
1 in.
and Outlet
NPT Inlet
and Outlet
A Ref.
B C
A Ref.
B C
1¼ in.
(32 mm)
1¼ in.
(32 mm)
415⁄16 in.
(125.4 mm)
Ref.
415⁄16 in. ½ in.
(125.4 mm) NPT Drain
3⁄8-16 UNC Ref.55⁄8 in.
(142.9 mm)
(Threads ½ in.
(4 Places)
3⁄8-16 UNC 55⁄8 in. 31⁄8NPT
in.
Drain
(Threads (142.9 mm)(79.4 mm)
(4 Places)
31⁄8 in.
43⁄8 in. (79.4 mm)
(111.1 mm)
43⁄8 in.
(111.1 mm)
43⁄8 in.
(111.1 mm)
3"-150#
FLANGE
43⁄8 in.
350 3"-150# WATLOW
(111.1
½ in.mm)
NPT Drain
®
FLANGE
73⁄16 in. Ref.
2 1/2 NPT (182.6 mm) 113⁄16 in.
1 in.
NPT Inlet
and Outlet
A Ref.
1¼ in.
(32 mm)

Circulation Heaters 415⁄16 in. ®
(125.4 mm)
Ref.
½ in.
3⁄8-16 UNC
Application: Forced Air and Caustic Solutions (Threads
(4 Places)
(142.9 mm)
31⁄8 in.
• Without thermostat 43⁄8 in.

(111.1 mm)
FLANGE
23 W/in2 240 3.0 1 1 CFMNA18A10S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419)
Steel Tank ½ in.
240 3.0 3 1 CFMNA18A3S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419) NPT Drain
3-Alloy 800
Elements 480 3.0 1 1 CFMNA18A11S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419)
711⁄16 in. Ref.
(3.6 W/cm2) 480 3.0 3 1 CFMNA18A5S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419) (195.3 mm) 11½ in. Ref.
(292 mm)
240 4.5 1 1 CFMNA25J10S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673)
1 in.
240 4.5 3 1 CFMNA25J3S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) A Ref.
NPT Inlet
& Outlet
B
480 4.5 1 1 CFMNA25J11S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) C

480 4.5 3 1 CFMNA25J5S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) 1¼ in.

(32 mm)
240 6.0 1 1 CFMNA33A10S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) (2 Places)
240 6.0 3 1 CFMNA33A3S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) 3⁄8-16 UNC 55⁄8 in. Ref.
(Threads (142.9 mm)
480 6.0 1 1 CFMNA33A11S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) (4 Places)
½ in.
480 6.0 3 1 CFMNA33A5S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) 31⁄8 in. Dia. NPT
240 7.5 1 1 CFMNA40J10S M 100 (46) 573/4 (1465) 45 (1143) 39 (991)
240 7.5 3 1 CFMNA40J3S M 100 (46) 573/4 (1465) 45 (1143) 39 (991)
480 7.5 1 1 CFMNA40J11S M 100 (46) 573/4 (1465) 45 (1143) 39 (991)
480 7.5 3 1 CFMNA40J5S M 100 (46) 573/4 (1465) 45 (1143) 39 (991)
240 9.0 1 1 CFMNA48A10S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
240 9.0 3 1 CFMNA48A3S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
480 9.0 1 1 CFMNA48A11S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
480 9.0 3 1 CFMNA48A5S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
RAPID SHIP
Truck Shipment only
• RS - Next day shipment

up to 5 pieces
WATLOW® 351
Circulation Heaters


Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm) in.
4"-150# (mm) 513⁄16 in.
23 W/in2 6 240 6.0 1 1 CFONA18A10S M 125 (57) 39 (989) 201/2 (521)

4"-150# 17 (432) 513⁄16 in.
Steel Tank 240 6.0 3 1 CFONA18A3S M 125 (57) 39 (989) 201/2 (521)
FLANGE 17 (432) (147.6 mm)
½ in.
6-Alloy 800 480 6.0 1 1 CFONA18A11S M 125 (57) 39 (989) 201/2 (521) 17 (432) NPT Drain
Elements 480 6.0 3 1 CFONA18A5S M 125 (57) 39 (989) 201/2 (521) 17 (432)
(3.6 W/cm2) 240 9.0 1 1 CFONA25J10S M 160 (73) 39 (989) 201/2 (521) 17 (432) ½ in.
125⁄8 in. Ref. NPT
14 3⁄8 in.Drain
Ref.
240 9.0 3 1 CFONA25J3S M 160 (73) 39 (989) 201/2 (521) 17 (432) (320.7 mm) (365.1 mm)
480 9.0 1 1 CFONA25J11S M 160 (73) 39 (989) 201/2 (521) 17 (432)
480 9.0 3 1 CFONA25J5S M 160 (73) 39 (989) 201/2 (521) 17 (432) 125⁄8
1½in.
in.Ref. 143⁄8 in. Ref.
(320.7 mm)
NPT Inlet
240 12.0 1 2 CFONA33A10S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) A Ref.
and Outlet
(365.1 mm)
240 12.0 3 1 CFONA33A3S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) B C
480 12.0 1 1 CFONA33A11S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) 1½ in.
1 A Ref. NPT Inlet
480 12.0 3 1 CFONA33A5S M 163 (74) 49 /2 (1256) 31 (787) 271/2 (699) and Outlet 1¼ in.
B (32 mm) C
240 15.0 1 2 CFONA40J10S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) (2 Places)
240 15.0 3 1 CFONA40J3S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) 3⁄8-16 UNC 65⁄8 in.
(Threads (168.3 mm)
480 15.0 1 1 CFONA40J11S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) (4 Places) 1¼ in.
480 15.0 3 1 CFONA40J5S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) ½ in.(32 mm)
311⁄16 in. NPT
(2 Places)
240 18.0 1 2 CFONA48A10S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) 3⁄8-16(93.7
UNCmm) Drain
65⁄8 in.
240 18.0 3 1 CFONA48A3S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) (Threads (168.3 mm)
(4 Places)
480 18.0 1 1 CFONA48A11S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) ½ in.
480 18.0 3 1 CFONA48A5S M 234 (107) 701/2 (1789) 52 (1321) 48 1/2 (1232) 311⁄16 in. 59⁄16 in. Ref.NPT
5"-150# (93.7 mm) Drain
240 25.0 3 2 CFONA64J3S M 298 (136) 911/2 (2326) 73 (1854) 66 FLANGE (1676) (141.3 mm)
480 25.0 1 2 CFONA64J11S M 298 (136) 911/2 (2326) 73 (1854) 66 (1676) 5 inch - 150 lb ANSI Flange
½ in.
480 25.0 3 1 CFONA64J5S M 298 (136) 911/2 (2326) 73 (1854) 66 (1676) NPT Drain
240 30.0 3 2 CFONA77A3S M 306 (139) 911/2 (2326) 73 (1854) 5"-150#
66 (1676) 59⁄16 in. Ref.
(141.3 mm)
480 30.0 1 2 CFONA77A11S M 306 (139) 911/2 (2326) 73 (1854) FLANGE 66 (1676) 125⁄8 in. Ref.
480 30.0 3 1 CFONA77A5S M 306 (139) 911/2 (2326) 73 (1854) 66 (1676) (320.7 mm) ½ in.
C
NPT Drain
5 inch - 150 lb ANSI Flange (WATROD) 2 in.
NPT Inlet
23 W/in2 6 240 9.0 1 1 CFNNA25J10S M 140 (64) 491/4 (1249.0) 30 (762.0) 147/8 (377.8) 5⁄8 in.
A Ref. 12and Outlet
Ref. 25 in.
Steel Tank 240 9.0 3 1 CFNNA25J3S M 140 (64) 491/4 (1249.0) 30 (762.0) 147/8 (377.8) B
(320.7 mm) (635 mm)C
6-Alloy 800 480 9.0 1 1 CFNNA25J11S M 140 (64) 491/4 (1249.0) 30 (762.0) 147/8 (377.8)
Elements 480 9.0 3 1 CFNNA25J5S M 140 (64) 491/4 (1249.0) 30 (762.0) 147/8 (377.8) 1¼ in.
2 in.
(3.6 W/cm2) 240 12.0 1 2 CFNNA33A10S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) (32 mm)
NPT Inlet (2 Places)
240 12.0 3 1 CFNNA33A3S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) A Ref. and Outlet
25 in.
B
480 12.0 1 1 CFNNA33A11S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 3⁄8-16 UNC 75⁄8 in. (635 mm)
(Threads (193.7 mm)
480 12.0 3 1 CFNNA33A5S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) (4 Places)
½ in.1¼ in.
240 15.0 1 2 CFNNA40J10S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) NPT(32 mm)
240 15.0 3 1 CFNNA40J3S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) Drain
(2 Places)
480 15.0 1 1 CFNNA40J11S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 4¼ in.
480 15.0 3 1 CFNNA40J5S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 3⁄8-16 UNC
(108 mm) 75⁄8 in.
(Threads (193.7 mm)
240 18.0 1 2 CFNNA48A10S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) (4 Places)
240 18.0 3 1 CFNNA48A3S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) ½ in.
NPT
480 18.0 1 1 CFNNA48A11S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) 65⁄8 in.Drain
Ref.
6"-150#
480 18.0 3 1 CFNNA48A5S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) (168.3 mm)
FLANGE 4¼ in.
240 25.0 3 2 CFNNA64J3S M 1 7
195 (89) 81 /8 (2060.6) 61 /8 (1571.6) 25 (633.0) (108 mm)
480 25.0 1 2 CFNNA64J11S M 195 (89) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) ½ in.
NPT Drain
480 25.0 3 1 CFNNA64J5S M 195 (89) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0)
240 30.0 3 2 CFNNA77A3S M 220 (100) 941/8 (2390.8) 75 (1902.0) 25 (633.0)
1211⁄16 in. Ref.
480 30.0 1 2 CFNNA77A11S M 220 (100) 941/8 (2390.8) 75 (1902.0)
6"-150# 25 (633.0) (322.3 mm) 5⁄87⁄16in.in.Ref.
614 Ref.
(366.7mm)
(168.3 mm)
480 30.0 3 1 CFNNA77A5S M 220 (100) 941/8 (2390.8) 75 (1902.0)
FLANGE 25 (633.0)
• M - Manufacturing lead times 6 Can be wired 3-phase wye to produce 2½ in.

NPT Inlet ½ in.
1/3 of the rated kW and watt density A Ref. and Outlet
NPT Drain
Truck Shipment only B C
352 1211⁄16 in. Ref. WATLOW ®

147⁄16 in. Ref.
(322.3 mm) (366.7 mm)
4"-150#
4"-150#
513⁄16
513⁄16 in. in.
FLANGE (147.6
(147.6 mm)mm)
FLANGE
½ in.
½ in.
NPT
NPT Drain
Drain
Circulation Heaters 125⁄8 5⁄8 in.

12in.
(320.7
(320.7
Ref.
mm)
Ref.
mm) 143⁄8 3⁄8 in.
14in.
(365.1
(365.1
Ref.
mm)
Ref.
mm)
½ in.
1½1in.
WATROD and FIREBAR A Ref. NPT
A Ref.
NPT Inlet
Inlet
and Outlet
and Outlet ®
Circulation Heaters
B B ®
C C
1¼1in.¼ in.
(32(32mm)mm)
Application: Forced Air and Caustic Solutions 3⁄8-16 UNC
(2 Places)
(2 Places)
5⁄8
3⁄8-16 UNC 6
65⁄8 in. in.
(Threads (168.3 mm)
• WATROD or FIREBAR elements (Threads
(4 Places)
(4 Places)
(168.3 mm)
½ in.
½ in.
• Without thermostat 311⁄16
311⁄16 in. in. NPTNPT
(93.7 mm) Drain
• General purpose enclosure (93.7 mm) Drain
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm) in. (mm) 59⁄16
5"-150#
5"-150# 59⁄16 in. in. Ref.
Ref.
5 inch - 150 lb ANSI Flange (WATROD) FLANGE (141.3
(141.3 mm) mm)
FLANGE
23 W/in2 6 240 14.0 1 3 CFNNA25J10XS M 145 (66) 491/4 (1249.0) 30 (762.0) 147/8 (377.8)
½ in.
½ in.
Steel Tank 240 14.0 3 1 CFNNA25J3XS M 145 (66) 491/4 (1249.0) 30 (762.0) 147/8 (377.8) NPT Drain
NPT Drain
9-Alloy 800 480 14.0 1 1 CFNNA25J11XS M 145 (66) 491/4 (1249.0) 30 (762.0) 147/8 (377.8)
Elements 480 14.0 3 1 CFNNA25J5XS 1 7
M 145 (66) 49 /4 (1249.0) 30 (762.0) 14 /8 (377.8)
(3.6 W/cm2) 240 18.0 1 3 CFNNA33A10XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 125⁄8 5⁄8 in.
12in. Ref.Ref.
(320.7 mm)
240 18.0 3 1 CFNNA33A3XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) (320.7 mm)
C C
480 18.0 1 1 CFNNA33A11XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (473.1)
480 18.0 3 1 CFNNA33A5XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 2 in.
2 in.
NPTNPT Inlet
Inlet
240 23.0 1 3 CFNNA40J10XS M 174 (79) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) A Ref.and and Outlet
Outlet
1 5 A Ref. 25 25
in. in.
240 23.0 3 3 CFNNA40J3XS M 174 (79) 56 /4 (1427.0) 37 (940.0) 18 /8 (473.1) B B (635 mm)
(635 mm)
480 23.0 1 1 CFNNA40J11XS M 174 (79) 561/4 (1427.0) 37 (940.0) 185/8 (473.1)
480 23.0 3 1 CFNNA40J5XS M 174 (79) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) ¼ in.
1¼1in.
240 27.0 1 3 CFNNA48A10XS M 189 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) (32(32
mm) mm)
(2 Places)
(2 Places)
240 27.0 3 3 CFNNA48A3XS M 189 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0)
480 27.0 1 3 CFNNA48A11XS M 189 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) 3⁄8-16 UNC 5⁄8 in.
3⁄8-16 UNC 75⁄87in.
480 27.0 3 1 CFNNA48A5XS M 189 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) (Threads
(Threads (193.7
(193.7 mm) mm)
240 38.0 3 3 CFNNA64J3XS 1 7 (4
M 207 (94) 81 /8 (2060.6) 61 /8 (1571.6) 25 (633.0)(4 Places)Places)
½
½ in. in.
480 38.0 1 3 CFNNA64J11XS M 207 (94) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) NPT NPT
DrainDrain
480 38.0 3 1 CFNNA64J5XS M 207 (94) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0)
240 45.0 3 3 CFNNA77A3XS M 233 (106) 941/8 (2389.0) 75 (1902.0) 25 (633.0) ¼ in.
4¼4in.
(108
(108 mm) mm)
480 45.0 1 3 CFNNA77A11XS M 233 (106) 941/8 (2389.0) 75 (1902.0) 25 (633.0)
480 45.0 3 3 CFNNA77A5XS M 233 (106) 941/8 (2389.0) 75 (1902.0) 25 (633.0)
6 inch - 150 lb ANSI Flange (WATROD) 5⁄8 in.
1/26"-150# 65⁄86in. Ref.Ref.
23 W/in2 6 240 12.0 1 2 CFPNA17R10S M 214 (97) 401/2 (1027) 206"-150# (521) 17 (432) (168.3
(168.3 mm) mm)
FLANGE
FLANGE
Steel Tank 240 12.0 3 1 CFPNA17R3S 1 1
M 214 (97) 40 /2 (1027) 20 /2 (521) 17 (432)
12-Alloy 800 480 12.0 1 1 CFPNA17R11S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
½ in.
Elements NPT Drain
480 12.0 3 1 CFPNA17R5S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432) NPT Drain
(3.6 W/cm2) 240 18.0 1 2 CFPNA25G10S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432)
240 18.0 3 1 CFPNA25G3S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16
1211⁄16 in. in. Ref. 147⁄16
(322.3
Ref.
mm) 147⁄16 in. in.
Ref.Ref.
480 18.0 1 1 CFPNA25G11S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) (322.3 mm) (366.7
(366.7 mm)mm)
480 18.0 3 1 CFPNA25G5S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432)
240 24.0 1 3 CFPNA32R10S M 226 (103) 51 (1294) 31 (787) 271/2 (699) 2½2in. ½ in.
NPT NPT Inlet
Inlet
240 24.0 3 2 CFPNA32R3S M 226 (103) 51 (1294) 31 (787) 271/2 (699) A Ref. and
and Outlet Outlet
A Ref.
480 24.0 1 2 CFPNA32R11S M 226 (103) 51 (1294) 31 (787) 271/2 (699) B B C C
480 24.0 3 1 CFPNA32R5S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
240 30.0 1 3 CFPNA40G10S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232)
240 30.0 3 2 CFPNA40G3S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) ½ in.
3½3in.
480 30.0 1 2 CFPNA40G11S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) (89(89
mm) mm)
480 30.0 3 1 CFPNA40G5S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) (2 Places)
(2 Places)
¾-10 UNC 2B 2B 8¾8in.¾ in.
240 36.0 1 4 CFPNA47R10S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) ¾-10 UNC (222 mm)
(Threads
(Threads (222 mm)
240 36.0 3 2 CFPNA47R3S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) (4 (4 Places)
Places)
480 36.0 1 2 CFPNA47R11S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) ½ in.
½ in.
NPT NPT
480 36.0 3 1 CFPNA47R5S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) Drain
Drain
240 50.0 3 4 CFPNA64G3S M 360 (164) 93 (2361) 73 (1854) 66 (1676) 4¾4in.¾ in.
(121(121
mm) mm)
480 50.0 1 3 CFPNA64G11S M 360 (164) 93 (2361) 73 (1854) 66 (1676)
480 50.0 3 2 CFPNA64G5S M 360 (164) 93 (2361) 73 (1854) 66 (1676)
240 60.0 3 4 CFPNA76R3S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
480 60.0 1 3 CFPNA76R11S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
480 60.0 3 2 CFPNA76R5S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
• M - Manufacturing lead times 6 Can be wired 3-phase wye to produce
1/3 of the rated kW and watt density
Truck Shipment only
WATLOW® 353
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C

2 in.
NPT Inlet
and Outlet
25 in.
B
(635 mm)
Circulation Heaters
(32 mm)
(2 Places) ®
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
Application: Forced Air and Caustic Solutions (4 Places)
½ in.
NPT
Drain
(108 mm)
6"-150#
(168.3 mm)
23 W/in2 240 15.0 1 3 CFPNA17R10XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 240 15.0 3 1 CFPNA17R3XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
NPT Drain
15-Alloy 800 480 15.0 1 1 CFPNA17R11XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
Elements 480 15.0 3 1 CFPNA17R5XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
(3.6 W/cm2) 240 23.0 1 3 CFPNA25G10XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16 in. Ref. 147⁄16 in. Ref.
(322.3 mm) (366.7 mm)
240 23.0 3 5 CFPNA25G3XS 1 1
M 226 (103) 40 /2 (1027) 20 /2 (521) 17 (432)
480 23.0 1 1 1
1 CFPNA25G11XS M 226 (103) 40 /2 (1027) 20 /2 (521) 17 (432)
2½ in.
480 23.0 3 1 CFPNA25G5XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) NPT Inlet
240 30.0 1 3 CFPNA32R10XS M 288 (131) 51 (1294) 31 1
(787) 27 /2 (699) A Ref. and Outlet
B C
240 30.0 3 5 CFPNA32R3XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
480 30.0 1 3 CFPNA32R11XS M 288 (131) 51 (1294) 31 1
(787) 27 /2 (699)
480 30.0 3 1 CFPNA32R5XS M 288 (131) 51 (1294) 31 (787) 271/2 (699)
240 38.0 1 5 CFPNA40G10XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232) 3½ in.
(89 mm)
240 38.0 3 5 CFPNA40G3XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232) (2 Places)
480 38.0 1 3 CFPNA40G11XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232) ¾-10 UNC 2B 8¾ in.
480 38.0 3 1 CFPNA40G5XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232) (Threads (222 mm)
(4 Places)
240 45.0 1 5 CFPNA47R10XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232) ½ in.
240 45.0 3 5 CFPNA47R3XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232) NPT
Drain
480 45.0 1 3 CFPNA47R11XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232) 4¾ in.
480 45.0 3 5 CFPNA47R5XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232) (121 mm)
240 63.0 3 5 CFPNA64G3XS M 370 (168) 93 (2361) 73 (1854) 66 (1676)
480 63.0 1 3 CFPNA64G11XS M 370 (168) 93 (2361) 73 (1854) 66 (1676)
480 63.0 3 5 CFPNA64G5XS M 370 (168) 93 (2361) 73 (1854) 66 (1676) 8 inch - 150 lb ANSI Flange
240 75.0 3 5 CFPNA76R3XS M 381 (173) 93 (2361) 73 (1854) 66 (1676) 75⁄8 in.
480 75.0 1 5 CFPNA76R11XS M 381 (173) 93 (2361) 73 8"-150#(1854) 66 (1676)
FLANGE
(193.7 mm)
480 75.0 3 5 CFPNA76R5XS M 381 (173) 93 (2361) 73 (1854) 66 (1676)
½ in.
8 inch - 150 lb ANSI Flange (WATROD) NPT Drain
23 W/in2 240 30.0 1 3 CFRNA32N10S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
Steel Tank 240 30.0 3 2 CFRNA32N3S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
1411⁄16 in. Ref. 14½ in. Ref.
18-Alloy 800 480 30.0 1 2 CFRNA32N11S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) (373.1 mm) (368 mm)
Elements 480 30.0 3 1 CFRNA32N5S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
(3.6 W/cm2) 240 40.0 3 3 CFRNA43E3S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
2½ in.
480 40.0 1 2 CFRNA43E11S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) A Ref. NPT Inlet C
480 40.0 3 3 CFRNA43E5S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) B and Outlet
240 50.0 3 3 CFRNA51M3S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 50.0 1 3 CFRNA51M11S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
3½ in.
480 50.0 3 2 CFRNA51M5S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) (89 mm)
(2 Places)
¾-10 UNC 2B 10¾ in.
8 inch - 150 lb ANSI Flange (WATROD) (Threads (273 mm)
(4 Places)
23 W/in2 240 40.0 1 4 CFRNA33D10XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
½ in.
Steel Tank 240 40.0 3 4 CFRNA33D3XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) NPT
24-Alloy 800 480 40.0 1 2 CFRNA33D11XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) Drain
Elements 480 40.0 3 2 CFRNA33D5XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
(3.6 W/cm2) 240 53.0 3 4 CFRNA43M3XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) 5¾ in.
(146 mm)
480 53.0 1 3 CFRNA43M11XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
480 53.0 3 2 CFRNA43M5XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
240 67.0 3 4 CFRNA51M3XS M 457 (207) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 67.0 1 3 CFRNA51M11XS M 457 (207) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 67.0 3 2 CFRNA51M5XS M 457 (207) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
• M - Manufacturing lead times Truck Shipment
10"-150# only 1215⁄16 in.
FLANGE (328.6 mm)
(2) ¾ -10
3 in. UNC 2B
354 Flange
Inlet &
WATLOW Holes®
Outlet
11½ in.
Circulation Heaters


14 in.
• WATROD or FIREBAR elements (356 mm)
12"-150#
• Without thermostat FLANGE (2) ¾ -10
UNC 2B
• General purpose enclosure Holes
5 in. Flange
75⁄8 in.#
Part Ship Wt. “A” Dim. “B” Dim. “C” Dim.
Inlet & Outlet
Description Volts kW Ph Circ.
(193.7 Number
mm) Del. lbs (kg) in. (mm) in. (mm) in. (mm)
91⁄16 in. Ref.
23 W/in2 163⁄16 in. Ref.
240 60.0 3 ½ in.3 CFSNA43N3S M 515 (234) 765/8 (1946.3) 607/8 (1546.2) 675/16 (1709.7) (230.2 mm)
(411.2 mm)
Steel Tank 480 60.0 3 NPT Drain 5 7 5
3 CFSNA43N5S M 515 (234) 76 /8 (1946.3) 60 /8 (1546.2) 67 /16 (1709.7)
27-Alloy 800 ½ in.
Elements 240 75.0 3 9 CFSNA51N3S M 530 (241) 841/8 (2136.8) 683/8 (1736.2) 7413/16 (1900.2)
NPT Drain
1411⁄16 in.
(3.6 W/cm 2 480 75.0 314½ in.
) Ref. CFSNA51N5S M 530 (241) 841/8 (2136.8) 683/8 (1736.2) 7413/16 (1900.2)
3 Ref.
(373.1 mm) (368 mm)
A Ref.
C
12 inch -NPT
A Ref.
2½ in.
150Inlet
lb ANSI
Flange (WATROD)
C
7 B
B2and Outlet
23 W/in 480 80.0 3 3 CFTNA43L5S M 565 (257) 767/8 (1952.6) 603/4 (1541) 671/2 (1714.0)
½ in.
Steel Tank 480 100.0 3 3 CFTNA51L5S M 585 (266) 843/8 (2143.1) 681/4 (1732) 75 (1905.0) (13 mm)
36-Alloy 800 3½ in.
Elements (89 mm) 147⁄8 in.
(3.6 W/cm2) (2 Places) (377.8 mm)
¾-10 UNC 2B 10¾ in. 7⁄8 in. (22.2 mm) X
(Threads (273 mm) 2 in. (51 mm) Slot
(4 Places)
½ in. 4
480 100.0 3 NPTCFWNA43J5S M 570 (259) 753/4 (1924) 591/2 (1510) 663/16 (1681.2)
3Drain
23 W/in2
Steel Tank 480 125.0 3 5 CFWNA51J5S M 590 (268) 831/4 (2115) 67 (1700) 7311/16 (1871.7) 12½ in.
45-Alloy 800 (318 mm)
5¾ in.
Elements(146
mm)
(3.6 W/cm2)
14 in. 15 in.
0"-150# 1215⁄16 in. (356 mm) (381 mm)
ANGE (328.6 mm)12"-150#
FLANGE (2) ¾ -10
14"-150#
(2) ¾ -10 UNC 2B
3 in. UNC 2B FLANGE (2) ¾ -10
Flange Holes UNC 2B
Holes 5 in. Flange
Inlet & Holes
Outlet Inlet & Outlet 6 in. Flange
11½ in. Inlet & Outlet
(292 mm)
9 in. Ref. 11½ in.
91⁄16 in. Ref.
15¾ in. Ref. (229 mm) 163⁄16 in. Ref. (230.2 mm) (292 mm)
(400 mm) (411.2 mm) 9¼ in. Ref.
165⁄16 in. Ref. (235 mm)
(414.3 mm)
½ in.
NPT Drain
½ in.
NPT Drain 9
A Ref.
C A Ref.
8 ½ in.
NPT Drain
B C A Ref.
B
C
B
½ in.
(13 mm) ½ in.
(13 mm) 3½ in.
(89 mm)
½ in.
127⁄8 in. (13 mm)
(327 mm) 147⁄8 in.
7⁄8 in. (22.2 mm) X (377.8 mm)
2 in. (51 mm) Slot 7⁄8 in. (22.2 mm) X 161⁄8 in.
2 in. (51 mm) Slot (410 mm) 7⁄8 in. (22.2 mm) X
2 in. (51 mm) Slot
4
4
4
12½ in. 12½ in.

(318 mm) (318 mm) 12½ in.
(318 mm)
WATLOW® 355
Circulation Heaters

Application: Lightweight Oils and Heat Transfer Oils

1
1 1/4 NPT
SCREW PLUG
(mm)
67⁄16 in. Ref.
23 W/in2 4 120/240 1.5 1 1 CBES19G6S RS 29 (14) 245/8 (625.5) 15 (381) 31/8 (79.4) (163.5 mm)
Steel Tank
120/240 2.0 1 1 CBES25G6S RS 29 (14) 325/8 (828.7) 23 (584) 3 (76.0)
2-Steel
Element
(3.6 W/cm2) ¾ in.
NPT Inlet
and Outlet
A Ref.
11/4 inch NPT Screw Plug (FIREBAR) B
30 W/in2 240 1.7 3 1 CBDNF16G12S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
Steel Tank
480 1.7 3 1 CBDNF16G13S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
1-Alloy 800
Element 240 2.2 3 1 CBDNF19G12S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
(4.7 W/cm2) 480 2.2 3 1 CBDNF19G13S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
C Ref.
240 2.8 3 1 CBDNF24L12S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
480 2.8 3 1 CBDNF24L13S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) ½ in.
4 in. NPT
240 3.5 3 1 CBDNF29R12S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) (102 mm) Drain
480 3.5 3 1 CBDNF29R13S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
240 4.3 3 1 CBDNF34R12S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
480 4.3 3 1 CBDNF34R13S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
3¾ in.
240 5.7 3 1 CBDNF45G12S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) (95 mm)
480 5.7 3 1 CBDNF45G13S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1)

240 7.2 3 1 CBDNF55R12S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
480 7.2 3 1 CBDNF55R13S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
73⁄16 in. Ref.
2 1/2 NPT (182.6 mm)
11/4 inch NPT Screw Plug (FIREBAR) 113⁄16 in.
23 W/in2 240 1.25 3 1 CBDNF16G20S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4)
Steel Tank 1 in.
240 1.65 3 1 CBDNF19G20S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) NPT Inlet
1-Alloy 800 and Outlet
Element 240 2.15 3 1 CBDNF24L20S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
(3.6 W/cm2) 480 2.15 3 1 CBDNF24L19S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) A Ref.
B
240 2.65 3 1 CBDNF29R20S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) C
480 2.65 3 1 CBDNF29R19S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
1¼ in.
240 3.20 3 1 CBDNF34R20S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) (32 mm)
480 3.20 3 1 CBDNF34R19S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
240 4.25 3 1 CBDNF45G20S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) 415⁄16 in.
(125.4 mm)
480 4.25 3 1 CBDNF45G19S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) Ref.
240 5.40 3 1 CBDNF55R20S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1) ½ in.
3⁄8-16 UNC
480 5.40 3 1 CBDNF55R19S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1) (Threads (142.9 mm)
(4 Places)
RAPID SHIP
4 Wired for higher voltage 31⁄8 in.
(79.4 mm)
up to 5 pieces 43⁄8 in.
(111.1 mm)
43⁄8 in.
356 3"-150# WATLOW
(111.1 mm)®
FLANGE
(163.5 mm)
¾ in.
NPT Inlet
and Outlet
A Ref.
B
Circulation Heaters

Circulation Heaters
C Ref.
®
½ in.
4 in. NPT
(102 mm) Drain
• Without thermostat 3¾ in.
(95 mm)
1
21/2 inch NPT Screw Plug (WATROD) 73⁄16 in. Ref.
2 1/2 NPT
23 W/in2 240 3.0 3 1 CBLS717E3S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419) (182.6 mm) 113⁄16 in.
Steel Tank 480 3.0 3 1 CBLS717E5S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
3-Steel 1 in.
240 4.5 3 1 CBLS724N3S RS 27 (13) 343/4 (881) 221/2 (572) 161/2 (419) NPT Inlet
(3.6 W/cm2) and Outlet
480 4.5 3 1 CBLS724N5S RS 27 (13) 343/4 (881) 221/2 (572) 161/2 (419)
240 6.0 3 1 CBLS732E3S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673)
A Ref.
480 6.0 3 1 CBLS732E5S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) B C
240 7.5 3 1 CBLS739N3S RS 31 (14) 571/4 (1453) 45 (1143) 39 (991)
480 7.5 3 1 CBLS739N5S RS 31 (14) 571/4 (1453) 45 (1143) 39 (991) 1¼ in.
(32 mm)
240 9.0 3 1 CBLS747E3S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991)
480 9.0 3 1 CBLS747E5S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991)
415⁄16 in.
(125.4 mm)
Ref.
21/2 inch NPT Screw Plug (FIREBAR) ½ in.
30 W/in2 3 240 5.0 3 1 CBLNF15C12S M 22 (10) 343/4 (881) 221/2 (572) 161/2 (419) 3⁄8-16 UNC 55⁄8 in. NPT Drain
Steel Tank (Threads (142.9 mm)
480 5.0 3 1 CBLNF15C13S M 22 (10) 343/4 (881) 221/2 (572) 161/2 (419) (4 Places)
3-Alloy 800 31⁄8 in.
240 6.5 3 1 CBLNF18C12S M 23 (11) 343/4 (881) 221/2 (572) 161/2 (419)
Elements (79.4 mm)
(4.7 W/cm2) 480 6.5 3 1 CBLNF18C13S M 23 (11) 343/4 (881) 221/2 (572) 161/2 (419)
240 8.5 3 1 CBLNF23C12S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) 43⁄8 in.
(111.1 mm)
480 8.5 3 1 CBLNF23C13S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419)
240 10.5 3 1 CBLNF28L12S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673)
480 10.5 3 1 CBLNF28L13S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673)
240 12.8 3 1 CBLNF33L12S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) 43⁄8 in.
(111.1 mm)
3"-150# 1
480 12.8 3 1 CBLNF33L13S M 35 (16) 443/4 (1135) 321/2 (1129) 26 /2 (673)
FLANGE
240 17.0 3 1 CBLNF44C12S M 44 (20) 571/4 (1453) 45 (1143) 39 (991)
½ in.
480 17.0 3 1 CBLNF44C13S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) NPT Drain
480 21.5 3 1 CBLNF54L13S M 52 (24) 633/4 (1618) 511/2 (1308) 461/2 (1181)
711⁄16 in. Ref.
(195.3 mm) 11½ in. Ref.
21/2 inch NPT Screw Plug (FIREBAR) (292 mm)
23 W/in2 8 240 3.80 3 1 CBLNF15C20S M 22 (10) 343/4 (881) 221/2 (572) 161/2 (419) 1 in.
Steel Tank 240 4.90 3 1 CBLNF18C20S M 23 (11) 343/4 (881) 221/2 (572) 161/2 (419) NPT Inlet
3-Alloy 800 A Ref. & Outlet
240 6.40 3 1 CBLNF23C20S M 31 3 1 1
(14) 34 /4 (881) 22 /2 (572) 16 /2 (419) B C
Elements
(3.6 W/cm2) 480 6.40 3 1 CBLNF23C19S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419)
1¼ in.
240 7.90 3 1 CBLNF28L20S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) (32 mm)
480 7.90 3 1 CBLNF28L19S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) (2 Places)
55⁄8 in. Ref.
240 9.60 3 1 CBLNF33L20S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673)3⁄8(Threads
-16 UNC
(142.9 mm)
480 9.60 3 1 CBLNF33L19S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673)(4 Places)
½ in.
240 12.80 3 1 CBLNF44C20S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) 31⁄8 in. Dia. NPT
480 12.80 3 1 CBLNF44C19S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) (79.4 mm) Ref. Drain
240 16.10 3 1 CBLNF54L20S M 52 3 1 1

(24) 63 /4 (1618) 51 /2 (1308) 46 /2 (1181)
480 16.10 3 1 CBLNF54L19S M 52 (24) 633/4 (1618) 511/2 (1308) 461/2 (1181)
RAPID SHIP
3 Wired for 3-phase operation only
8 Can be wired for 1-phase operation
up to 5 pieces
WATLOW® 357
73⁄16 in. Ref.
2 1/2 NPT (182.6 mm) 113⁄16 in.
1 in.
NPT Inlet
and Outlet
A Ref.
1¼ in.
WATROD and FIREBAR

(32 mm)
®
®
(125.4 mm)
Ref.
½ in.
Application: Lightweight Oils and Heat Transfer Oils 3⁄8-16 UNC
(Threads (142.9 mm)
(4 Places)
31⁄8 in.
43⁄8 in.
(111.1 mm)
23 W/in2 240 3.0 1 1 CFMS718A10S RS 68 (31) 351/4 (894) 221/2 (573) 161/23"-150#
(419)
FLANGE
Steel Tank 240 3.0 3 1 CFMS718A3S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419)
3-Steel 480 3.0 1 1 CFMS718A11S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419) ½ in.
NPT Drain
Elements 480 3.0 3 1 CFMS718A5S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419)
(3.6 W/cm2) 240 4.5 1 1 CFMS725J10S M 78 (36) 351/4 (894) 221/2 (573) 161/2 (419) 711⁄16 in. Ref.
240 4.5 3 1 CFMS725J3S M 78 (36) 351/4 (894) 221/2 (573) 161/2 (419) (195.3 mm) 11½ in. Ref.
(292 mm)
480 4.5 1 1 CFMS725J11S M 78 (36) 351/4 (894) 221/2 (573) 161/2 (419)
1 in.
480 4.5 3 1 CFMS725J5S M 78 (36) 351/4 (894) 221/2 (573) 161/2 (419) NPT Inlet
A Ref. & Outlet
240 6.0 1 2 CFMS733A10S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) B C
240 6.0 3 1 CFMS733A3S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673)
480 6.0 1 1 CFMS733A11S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) 1¼ in.
(32 mm)
480 6.0 3 1 CFMS733A5S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) (2 Places)
240 7.5 1 2 CFMS740J10S M 100 (46) 573/4 (1465) 45 (1143) 39 (991) 3⁄8-16 UNC 55⁄8 in. Ref.
(Threads (142.9 mm)
240 7.5 3 1 CFMS740J3S M 100 (46) 573/4 (1465) 45 (1143) 39 (991) (4 Places)
480 7.5 1 1 CFMS740J11S M 100 (46) 573/4 (1465) 45 (1143) 39 (991) ½ in.
31⁄8 in. Dia. NPT
480 7.5 3 1 CFMS740J5S M 100 (46) 573/4 (1465) 45 (1143) 39 (991) (79.4 mm) Ref. Drain
240 9.0 1 2 CFMS748A10S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
240 9.0 3 1 CFMS748A3S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
480 9.0 1 1 CFMS748A11S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
480 9.0 3 1 CFMS748A5S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)

23 W/in2 240 6.0 1 1 CFOS718A10S M 125 (57) 39 (989) 201/2 (521) 17 (432) 4 inch - 150 lb ANSI Flange
Steel Tank 240 6.0 3 1 CFOS718A3S M 125 (57) 39 (989) 201/2 (521) 17 (432)
6-Steel 4"-150# 513⁄16 in.
480 6.0 1 1 CFOS718A11S M 125 (57) 39 (989) 201/2 (521)
FLANGE
17 (432) (147.6 mm)
Elements 480 6.0 3 1 CFOS718A5S M 125 (57) 39 1
(989) 20 /2 (521) 17 (432)
(3.6 W/cm2) 240 9.0 1 1 CFOS725J10S M 160 (73) 39 (989) 201/2 (521) 17 (432)
240 9.0 3 1 CFOS725J3S M 160 (73) 39 (989) 201/2 (521) 17 (432) ½ in.
NPT Drain
480 9.0 1 1 CFOS725J11S M 160 (73) 39 (989) 201/2 (521) 17 (432)
480 9.0 3 1 CFOS725J5S M 160 (73) 39 (989) 201/2 (521) 17 (432)
125⁄8 in. Ref. 143⁄8 in. Ref.
240 12.0 1 2 CFOS733A10S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) (320.7 mm) (365.1 mm)
240 12.0 3 1 CFOS733A3S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699)
480 12.0 1 1 CFOS733A11S M 163 1
(74) 49 /2 (1256) 31 1
(787) 27 /2 (699) 1½ in.
480 12.0 3 1 CFOS733A5S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) A Ref. and NPT Inlet
Outlet
240 15.0 1 2 CFOS740J10S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) B C
240 15.0 3 1 CFOS740J3S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232)
480 15.0 1 1 CFOS740J11S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) 1¼ in.
480 15.0 3 1 CFOS740J5S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) (32 mm)
(2 Places)
240 18.0 1 2 CFOS748A10S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) 3⁄8-16 UNC 65⁄8 in.
1 1 (Threads (168.3 mm)
240 18.0 3 1 CFOS748A3S M 234 (107) 70 /2 (1789) 52 (1321) 48 /2 (1232) (4 Places)
½ in.
480 18.0 1 1 CFOS748A11S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) 311⁄16 in. NPT
480 18.0 3 1 CFOS748A5S M 234 1
(107) 70 /2 (1789) 52 1
(1321) 48 /2 (1232) (93.7 mm) Drain
240 25.0 3 2 CFOS764J3S M 298 (136) 911/2 (2326) 73 (1854) 66 (1676)

480 25.0 1 2 CFOS764J11S M 298 (136) 911/2 (2326) 73 (1854) 66 (1676)
480 25.0 3 1 CFOS764J5S M 298 (136) 911/2 (2326) 73 (1854) 66 5"-150# (1676) 59⁄16 in. Ref.
FLANGE (141.3 mm)
240 30.0 3 2 CFOS777A3S M 306 (139) 911/2 (2326) 73 (1854) 66 (1676)
480 30.0 1 2 CFOS777A11S M 306 (139) 911/2 (2326) 73 (1854) 66 (1676) ½ in.
NPT Drain
480 30.0 3 1 CFOS777A5S M 306 (139) 911/2 (2326) 73 (1854) 66 (1676)
RAPID SHIP
Truck Shipment only
125⁄8 in. Ref.
(320.7 mm)
C
• RS - Next day shipment up to 5 pieces • M - Manufacturing lead times
358 2 in.
NPT Inlet
WATLOW®
A Ref. and Outlet
25 in.
Circulation Heaters


4"-150#
in. (mm) 513⁄16 in.
4 inch - 150 lb ANSI Flange (FIREBAR) FLANGE (147.6 mm)
30 W/in2 240 10.0 3 1 CFONF16J12S M 128 (58) 39 (989) 201/24"-150#
(521) 17 (432) 513⁄16 in.
Steel Tank 480 10.0 3 1 CFONF16J13S M 128 (58) 39 (989) 201/2FLANGE
(521) 17 (432) (147.6 mm)
½ in.
6-Alloy 800 240 13.0 3 1 CFONF19J12S M 130 (59) 39 (989) 201/2 (521) 17 (432) NPT Drain
Elements 480 13.0 3 1 CFONF19J13S M 130 (59) 39 1
(989) 20 /2 (521) 17 (432)
(4.7 W/cm2) ½ in.
240 17.0 3 1 CFONF24J12S M 133 (61) 39 (989) 201/2 (521) 17 (432) 125⁄8 in. Ref. NPT Drain
14 3⁄8 in. Ref.
480 17.0 3 1 CFONF24J13S M 133 (61) 39 1
(989) 20 /2 (521) 17 (432) (320.7 mm) (365.1 mm)
240 21.0 3 2 CFONF30A12S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699)
125⁄8 in. Ref.
1½ in. 143⁄8 in. Ref.
480 21.0 3 1 CFONF30A13S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) (320.7 mm)
A Ref. NPT Inlet (365.1 mm)
240 25.5 3 1
2 CFONF35A12S M 170 (78) 49 /2 (1256) 31 1
(787) 27 /2 (699) and Outlet
B C
480 25.5 3 1 CFONF35A13S M 170 (78) 491/2 (1256) 31 (787) 271/2 (699) 1½ in.
240 34.0 3 2 CFONF45J12S 1 1
M 236 (107) 70 /2 (1789) 52 (1321) 48 /2 (1232) A Ref. NPT Inlet
and Outlet 1¼ in.
480 34.0 3 1 CFONF45J13S M 236 (107) 701/2 (1789) 52 (1321) 481/2 (1232) B (32 mm)C
480 43.0 3 1 1
2 CFONF56A13S M 240 (109) 70 /2 (1789) 52 (1321) 48 /2 (1232) (2 Places)
3⁄8-16 UNC 65⁄8 in.
(Threads (168.3 mm)
(4 Places) 1¼ in.
4 inch - 150 lb ANSI Flange (FIREBAR) ½ in.
(32 mm)
23 W/in2 240 7.5 3 1 CFONF16J20S M 128 (58) 39 201/2 (521) 17
(989) (432) 311⁄16 in. NPT(2 Places)
Steel Tank 3⁄8-16(93.7
UNCmm) 6Drain
5⁄8 in.
240 10.0 3 1 CFONF19J20S M 130 (59) 39 (989) 201/2 (521) 17 (432) (Threads (168.3 mm)
6-Alloy 800 240 12.8 3 1 CFONF24J20S M 133 (61) 39 (989) 201/2 (521) 17 (432) (4 Places) ½ in.
Elements 480 12.8 3 1 CFONF24J19S M 133 (61) 39 (989) 201/2 (521) 17 (432) 311⁄16 in. NPT
59⁄16 in. Ref.
(3.6 W/cm2) 240 15.8 3 1 CFONF30A20S M 168 (77) 491/2 (1256) 31 5"-150#
(787) 27 1/2 (699) (93.7 mm)
(141.3 mm)
Drain
FLANGE
480 15.8 3 1 CFONF30A19S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) 5 inch - 150 lb ANSI Flange
1 ½ in.
240 19.0 3 1 CFONF35A20S M 170 (78) 49 /2 (1256) 31 (787) 271/2 (699) NPT Drain
480 19.0 3 1 CFONF35A19S M 170 (78) 491/2 (1256) 31 271/2 (699)
(787)5"-150# 59⁄16 in. Ref.
(141.3 mm)
240 25.0 3 2 CFONF45J20S M 236 (107) 701/2 (1789) 52 (1321)FLANGE
481/2 (1232)
125⁄8 in. Ref.
480 25.0 3 1 CFONF45J19S M 236 1 1
(107) 70 /2 (1789) 52 (1321) 48 /2 (1232) (320.7 mm) ½ in.C
240 32.3 3 2 CFONF56A20S M 240 (109) 701/2 (1789) 52 (1321) 481/2 (1232) NPT Drain
480 32.3 3 1 CFONF56A19S M 240 (109) 701/2 (1789) 52 (1321) 481/2 (1232) 2 in.
NPT Inlet
5⁄8 in.Outlet
A Ref.12and Ref.
25 in.
5 inch - 150 lb ANSI Flange (WATROD) (320.7
B mm)
(635 mm)C
23 W/in2 240 12.00 1 2 CFNS733A10S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1)
Steel Tank 240 12.00 3 1 CFNS733A3S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 2 in. 1¼ in.
6-Steel NPT Inlet (32 mm)
480 12.00 1 1 CFNS733A11S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) (2 Places)
A Ref. and Outlet
Elements 480 12.00 3 1 CFNS733A5S M 145 (66) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 25 in.
B
(3.6 W/cm2) 240 15.00 1 2 CFNS740J10S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) 3⁄8-16 UNC 75⁄8 in.(635 mm)
(Threads (193.7 mm)
240 15.00 3 1 CFNS740J3S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) (4 Places)
1¼ in.
½ in.
480 15.00 1 1 CFNS740J11S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1) NPT
(32 mm)
Drain
(2 Places)
480 15.00 3 1 CFNS740J5S M 167 (76) 561/4 (1427.0) 37 (940.0) 185/8 (473.1)
240 18.00 1 2 CFNS748A10S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 185/8 (473.1) 4¼ in.
3⁄8-16 UNC
(108 mm) 75⁄8 in.
240 18.00 3 1 CFNS748A3S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 185/8 (473.1) (Threads (193.7 mm)
480 18.00 1 1 CFNS748A11S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 185/8 (473.1) (4 Places)
½ in.
480 18.00 3 1 CFNS748A5S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 185/8 (473.1) NPT
Drain
240 25.00 3 2 CFNS764J3S M 195 (89) 811/8 (2060.6) 617/8 (1571.6) 65⁄8 in. Ref.
6"-150# 25 (633.0)
(168.3 mm)
480 25.00 1 2 CFNS764J11S M 195 (89) 811/8 (2060.6) 617/8 (1571.6)
FLANGE 25 (633.0) 4¼ in.
(108 mm)
480 25.00 3 1 CFNS764J5S M 195 (89) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) ½ in.
240 30.00 3 2 CFNS777A3S M 220 (100) 941/8 (2390.8) 75 (1902.0) 25 (633.0) NPT Drain
480 30.00 1 2 CFNS777A11S M 220 (100) 941/8 (2390.8) 75 (1902.0) 25 (633.0)

480 30.00 3 1 CFNS777A5S M 220 (100) 941/8 (2390.8) 75 (1902.0) 25 (633.0) 1211⁄16 in. Ref. 5⁄87⁄16
614 in.in. Ref.
Ref.
6"-150# (322.3 mm) (366.7mm)
(168.3 mm)
FLANGE
2½ in. ½ in.
NPT Inlet NPT Drain
A Ref. and Outlet
B C
WATLOW® 1211⁄16 in. Ref. 359
147⁄16 in. Ref.
(322.3 mm) (366.7 mm)
4"-150#
4"-150# 513⁄16
513⁄16 in. in.
FLANGE
FLANGE (147.6
(147.6 mm)mm)
½ in.
½ in.
NPT
NPT Drain
Drain
Circulation Heaters 125⁄8 5⁄8 in.

12in.
(320.7
(320.7
Ref.
mm)
Ref.
mm)
143⁄8 3⁄8 in.
14in.
(365.1
Ref.Ref.
mm)
(365.1 mm)
½ in.
1½1in.
A Ref. NPT
andand
Inlet
Inlet
Outlet
Outlet ®
Circulation Heaters
B B ®
C C
1¼1in.¼ in.
(32(32mm)mm)
Application: Lightweight Oils and Heat Transfer Oils 3⁄8-16
(2 Places)
(2 Places)
3⁄8-16 UNCUNC 5⁄8 in.
65⁄86in.
(Threads
• WATROD or FIREBAR elements (Threads
(4 Places)
(4 Places)
(168.3
(168.3 mm) mm)
½ in.
½ in.
311⁄16 in. in. NPTNPT
• General purpose enclosure (93.7
(93.7 mm) mm) Drain
Drain
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. (mm) in. (mm) 59⁄16
59⁄16 in. in.
Ref.Ref.
5"-150#
5"-150#
FLANGE
(141.3
(141.3 mm) mm)
23 W/in2 240 18.0 1 3 CFNS733A10XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (471.1)
½ in.
½ in.
Steel Tank 240 18.0 3 1 CFNS733A3XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (471.1 NPT NPT Drain
Drain
9-Steel 480 18.0 1 1 CFNS733A11XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (471.1
Elements 480 18.0 3 1 CFNS733A5XS M 150 (68) 561/4 (1427.0) 37 (940.0) 185/8 (471.1
(3.6 W/cm2) 125⁄8 5⁄8 in.
12in. Ref.Ref.
240 23.0 1 3 CFNS740J10XS M 173 (79) 561/4 (1427.0) 37 (940.0) 185/8 (471.1 (320.7
(320.7 mm) mm)
C C
240 23.0 3 3 CFNS740J3XS M 173 (79) 561/4 (1427.0) 37 (940.0) 185/8 (471.1
480 23.0 1 1 CFNS740J11XS 1 5
M 173 (79) 56 /4 (1427.0) 37 (940.0) 18 /8 (471.1 2 in.
2 in.
480 23.0 3 1 CFNS740J5XS M 173 (79) 561/4 (1427.0) 37 (940.0) 185/8 (471.1 NPT NPT Inlet
Inlet
3 1 A A
Ref.Ref.andand Outlet
Outlet
240 27.0 1 3 CFNS748A10XS M 188 (86) 67 /4 (1719.0) 48 /2 (1232.0) 25 (633.0) 25 25
in. in.
B B (635 mm)
240 27.0 3 3 CFNS748A3XS M 188 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) (635 mm)
480 27.0 1 3 CFNS748A11XS M 188 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0)
1¼1in.¼ in.
480 27.0 3 1 CFNS748A5XS M 188 (86) 673⁄4 (1719.0) 481/2 (1232.0) 25 (633.0) (32(32
mm) mm)
240 38.0 3 3 CFNS764J3XS M 206 (94) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) (2 Places)
(2 Places)
480 38.0 1 3 CFNS764J11XS M 206 (94) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) 3⁄8-16 UNC 5⁄8 in.
75⁄87in.
3⁄8-16 UNC
480 38.0 3 1 CFNS764J5XS M 206 (94) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0)(Threads
(Threads (193.7
(193.7 mm) mm)
(4 Places)
240 45.0 3 3 CFNS777A3XS M 233 (106) 941/8 (2390.8) 75 (1902.0) 25 (633.0)(4 Places) ½ in.
½ in.
NPT NPT
480 45.0 1 3 CFNS777A11XS M 233 (106) 941/8 (2390.8) 75 (1902.0) 25 (633.0) Drain
Drain
480 45.0 3 3 CFNS777A5XS 1
M 233 (106) 94 /8 (2390.8) 75 (1902.0) 25 (633.0)
¼ in.
4¼4in.
(108
(108 mm)mm)
23 W/in2 240 12.0 1 2 CFPS717R10S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432) 6 inch - 150 lb ANSI Flange
Steel Tank 240 12.0 3 1 CFPS717R3S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432)
12-Steel 480 12.0 1 1 CFPS717R11S M 214 (97) 401/2 (1027) 206"-150#
1/26"-150#
(521) 17 (432) 5⁄8 in.
65⁄86in. Ref.Ref.
(168.3
(168.3 mm) mm)
Elements 480 12.0 3 1 CFPS717R5S M 214 1 1 FLANGE
(97) 40 /2 (1027) 20 /2 (521) 17
FLANGE (432)
(3.6 W/cm2)
240 18.0 1 2 CFPS725G10S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) ½ in. ½ in.
240 18.0 3 1 CFPS725G3S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) NPT NPT Drain
Drain
480 18.0 1 1 CFPS725G11S M 222 1 1
(101) 40 /2 (1027) 20 /2 (521) 17 (432)
480 18.0 3 1 CFPS725G5S M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16
1211⁄16 in. in.
Ref.Ref. 147⁄16147⁄16
in. in.
Ref.Ref.
(322.3
(322.3 mm)mm) (366.7(366.7
mm) mm)
240 24.0 1 3 CFPS732R10S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
240 24.0 3 2 CFPS732R3S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
½ in.
2½2in.
480 24.0 1 2 CFPS732R11S M 226 (103) 51 (1294) 31 (787) 271/2 (699) NPT NPT Inlet
Inlet
480 24.0 3 1 CFPS732R5S M 226 (103) 51 (1294) 31 1
(787) 27 /2 (699) A Ref. and Outlet
A Ref.and Outlet
B B C C
240 30.0 1 3 CFPS740G10S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232)
240 30.0 3 2 CFPS740G3S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232)
480 30.0 1 2 CFPS740G11S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232)
480 30.0 3 1 CFPS740G5S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) 3½3in.½ in.
(89(89
mm) mm)
240 36.0 1 4 CFPS747R10S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) (2 Places)
(2 Places)
240 36.0 3 2 CFPS747R3S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) ¾-10 ¾-10UNCUNC2B 2B 8¾8in. ¾ in.
(Threads
(Threads (222 (222mm)mm)
480 36.0 1 2 CFPS747R11S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) (4 (4 Places)
Places)
480 36.0 3 1 CFPS747R5S M 298 1
(136) 72 (1827) 52 (1321) 48 /2 (1232) ½ ½
in. in.
NPTNPT
240 50.0 3 4 CFPS764G3S M 360 (164) 93 (2361) 73 (1854) 66 (1676) Drain
Drain
480 50.0 1 3 CFPS764G11S M 360 (164) 93 (2361) 73 (1854) 66 (1676) ¾ in.
4¾4in.
(121(121
mm) mm)
480 50.0 3 2 CFPS764G5S M 360 (164) 93 (2361) 73 (1854) 66 (1676)
240 60.0 3 4 CFPS776R3S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
480 60.0 1 3 CFPS776R11S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
480 60.0 3 2 CFPS776R5S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
360 WATLOW®
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C
Circulation Heaters 2 in.

NPT Inlet
and Outlet
A Ref. 25 in.
B
(635 mm)
Circulation Heaters
(32 mm)
(2 Places)
®
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
Application: Lightweight Oils and Heat Transfer Oils (4 Places)
½ in.
NPT
• WATROD or FIREBAR elements Drain

(108 mm)
# Part Ship Wt. “A” Dim. “B” Dim. “C” Dim.
(168.3 mm)
23 W/in2 240 15.0 1 3 CFPS717R10XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
Steel Tank 240 15.0 3 1 CFPS717R3XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) NPT Drain
15-Steel
480 15.0 1 1 CFPS717R11XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
Elements
480 15.0 3 1 CFPS717R5XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16 in. Ref. 147⁄16 in. Ref.
(3.6 W/cm2) (322.3 mm) (366.7 mm)
240 23.0 1 3 CFPS725G10XS M 222 (101) 401/2 (1027) 201/2 (521) 17 (432)
240 23.0 3 5 CFPS725G3XS 1 1
M 222 (101) 40 /2 (1027) 20 /2 (521) 17 (432) 2½ in.
480 23.0 1 1 CFPS725G11XS M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) NPT Inlet
A Ref. and Outlet
480 23.0 3 1 CFPS725G5XS M 222 (101) 401/2 (1027) 201/2 (521) 17 (432) B C
240 30.0 1 3 CFPS732R10XS M 226 (103) 51 (1294) 31 (787) 271/2 (699)
240 30.0 3 5 CFPS732R3XS M 226 (103) 51 (1294) 31 (787) 271/2 (699)
480 30.0 1 3 CFPS732R11XS M 226 (103) 51 (1294) 31 (787) 271/2 (699) 3½ in.
(89 mm)
480 30.0 3 1 CFPS732R5XS M 226 (103) 51 (1294) 31 (787) 271/2 (699) (2 Places)
240 38.0 1 5 CFPS740G10XS M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) ¾-10 UNC 2B 8¾ in.
(Threads (222 mm)
240 38.0 3 5 CFPS740G3XS M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) (4 Places)
1 ½ in.
480 38.0 1 3 CFPS740G11XS M 290 (132) 72 (1827) 52 (1321) 48 /2 (1232) NPT
480 38.0 3 1 CFPS740G5XS 1
M 290 (132) 72 (1827) 52 (1321) 48 /2 (1232) Drain
4¾ in.
240 45.0 1 5 CFPS747R10XS M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) (121 mm)
240 45.0 3 5 CFPS747R3XS M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 45.0 1 3 CFPS747R11XS M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 45.0 3 5 CFPS747R5XS M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
240 63.0 3 5 CFPS764G3XS M 360 (164) 93 (2361) 73 (1854) 66 (1676)
480 63.0 1 3 CFPS764G11XS M 360 (164) 93 (2361) 73 (1854) 66 (1676)
480 63.0 3 5 CFPS764G5XS M 360 (164) 93 (2361) 73 (1854) 66 (1676)
240 75.0 3 5 CFPS776R3XS M 368 (167) 93 (2361) 73 (1854) 66 (1676)
480 75.0 1 5 CFPS776R11XS M 368 (167) 93 (2361) 73 (1854) 66 (1676)
480 75.0 3 5 CFPS776R5XS M 368 (167) 93 (2361) 73 (1854) 66 (1676)
6 inch - 150 lb ANSI Flange (FIREBAR)

30 W/in2 3 240 25.0 3 5 CFPNF16J12S M 220 (100) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 480 25.0 3 5 CFPNF16J13S M 220 (100) 401/2 (1027) 201/2 (521) 17 (432)
15-Alloy 800
240 32.0 3 5 CFPNF19J12S M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
Elements
(4.7 W/cm2) 480 32.0 3 5 CFPNF19J13S M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
240 42.0 3 5 CFPNF24J12S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
480 42.0 3 5 CFPNF24J13S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
240 52.0 3 5 CFPNF30A12S M 232 (106) 51 (1294) 31 (787) 271/2 (699)
480 52.0 3 5 CFPNF30A13S M 232 (106) 51 (1294) 31 (787) 271/2 (699)
240 64.0 3 5 CFPNF35A12S M 236 (107) 51 (1294) 31 (787) 271/2 (699)
480 64.0 3 5 CFPNF35A13S M 236 (107) 51 (1294) 31 (787) 271/2 (699)
240 85.0 3 5 CFPNF45J12S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
480 85.0 3 5 CFPNF45J13S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
480 110.0 3 5 CFPNF56A13S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232)
• M - Manufacturing lead times 3 Wired for 3-phase operation only
Truck Shipment only
WATLOW® 361
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C
Circulation Heaters
2 in.
NPT Inlet
A Ref. and Outlet
25 in.
B
(635 mm)

(32 mm)
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
(4 Places)
Application: Lightweight Oils and Heat Transfer Oils ½ in.
NPT
Drain
4¼ in.
6"-150#
(168.3 mm)
23 W/in2 240 19.0 3 5 CFPNF16J20S M 220 (100) 401/2 (1027) 201/2 (521) 17 (432) ½ in.
240 24.0 3 5 CFPNF19J20S M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
15-Alloy 800
Elements 240 32.0 3 5 CFPNF24J20S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
1211⁄16 in. Ref. 147⁄16 in. Ref.
(3.6 W/cm2) 480 32.0 3 5 CFPNF24J19S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) (322.3 mm) (366.7 mm)
240 40.0 3 5 CFPNF30A20S M 232 (106) 51 (1294) 31 (787) 271/2 (699)
2½ in.
480 40.0 3 5 CFPNF30A19S M 232 (106) 51 (1294) 31 (787) 271/2 (699) NPT Inlet
240 48.0 3 5 CFPNF35A20S M 236 (107) 51 (1294) 31 (787) 271/2 (699) A Ref. and Outlet
B C
480 48.0 3 5 CFPNF35A19S M 236 (107) 51 (1294) 31 (787) 271/2 (699)
240 64.0 3 5 CFPNF45J20S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
480 64.0 3 5 CFPNF45J19S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232) 3½ in.
(89 mm)
240 80.0 3 5 CFPNF56A20S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232) (2 Places)
8¾ in.
480 80.0 3 5 CFPNF56A19S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232) ¾-10 UNC 2B (222 mm)
(Threads
(4 Places)
½ in.
8 inch - 150 lb ANSI Flange (WATROD) NPT
Drain
23 W/in2 240 30.0 1 3 CFRS732N10S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) 4¾ in.
Steel Tank (121 mm)
240 30.0 3 2 CFRS732N3S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
18-Steel
Elements 480 30.0 1 2 CFRS732N11S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
(3.6 W/cm2) 480 30.0 3 1 CFRS732N5S M 370 (168) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) 8 inch - 150 lb ANSI Flange
240 40.0 3 3 CFRS743E3S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) 75⁄8 in.
8"-150#
480 40.0 1 2 CFRS743E11S M 410 (186) 621/4 (1580.0) 393/4FLANGE
(1008.0) 361/4 (919.0) (193.7 mm)
480 40.0 3 2 CFRS743E5S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
½ in.
240 50.0 3 3 CFRS751M3S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) NPT Drain
480 50.0 1 3 CFRS751M11S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 50.0 3 2 CFRS751M5S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) 1411⁄16 in. Ref. 14½ in. Ref.
(373.1 mm) (368 mm)
240 60.0 3 6 CFRS762D3S M 480 (218) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
480 60.0 1 3 CFRS762D11S M 480 (218) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
2½ in.
A Ref.
480 60.0 3 2 CFRS762D5S M 480 (218) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) NPT Inlet C
B and Outlet
240 70.0 3 6 CFRS770M3S M 530 (241) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3)
480 70.0 1 6 CFRS770M11S M 530 (241) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3)
3½ in.
480 70.0 3 2 CFRS770M5S M 530 (241) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) (89 mm)
(2 Places)
240 80.0 3 6 CFRS779M3S M 610 (277) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) ¾-10 UNC 2B 10¾ in.
(Threads (273 mm)
480 80.0 3 3 CFRS779M5S M 610 (277) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) (4 Places)
½ in.
• M - Manufacturing lead times Truck Shipment only NPT
Drain
5¾ in.
(146 mm)
10"-150# 1215⁄16 in.

FLANGE (328.6 mm)
(2) ¾ -10
362 3 in.
Flange WATLOW UNC 2B
Holes
®
Inlet &
Outlet
Circulation Heaters


75⁄8 in.
(193.7 mm)
FLANGE
23 W/in2 240 40.0 1 4 CFRS733D10XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
Steel Tank
240 40.0 3 4 CFRS733D3XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) ½ in.
24-Steel
480 40.0 1 2 CFRS733D11XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) NPT Drain
(3.6 W/cm )2
480 40.0 3 2 CFRS733D5XS M 382 (174) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
1411⁄16 in. Ref. 14½ in. Ref.
240 53.0 3 4 CFRS743M3XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) (373.1 mm) (368 mm)
480 53.0 1 3 CFRS743M11XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
480 53.0 3 2 CFRS743M5XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) 2½ in.
A Ref. NPT Inlet C
240 67.0 3 4 CFRS751M3XS M 457 (208) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) B and Outlet
480 67.0 1 3 CFRS751M11XS M 457 (208) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
480 67.0 3 2 CFRS751M5XS M 457 (208) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) 3½ in.
(89 mm)
240 80.0 3 8 CFRS762D3XS M 461 (209) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) (2 Places)
¾-10 UNC 2B 10¾ in.
480 80.0 1 4 CFRS762D11XS M 461 (209) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) (Threads (273 mm)
(4 Places)
480 80.0 3 4 CFRS762D5XS M 461 (209) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) ½ in.
NPT
240 93.0 3 8 CFRS770M3XS M 554 (252) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) Drain
480 93.0 1 6 CFRS770M11XS M 554 (252) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3)
5¾ in.
480 93.0 3 4 CFRS770M5XS M 554 (252) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) (146 mm)
240 107.0 3 8 CFRS779M3XS M 636 (289) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
480 107.0 3 4 CFRS779M5XS M 636 (289) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
10"-150# 1215⁄16 in.

FLANGE (328.6 mm)
(2) ¾ -10
3 in. UNC 2B
Flange Holes
Inlet &
Outlet
11½ in.
(292 mm)
9 in. Ref.
15¾ in. Ref. (229 mm)
7 (400 mm)
½ in.
NPT Drain
A Ref.
C
B
½ in.
(13 mm)
127⁄8 in.
(327 mm)
7⁄8 in. (22.2 mm) X
2 in. (51 mm) Slot
12½ in.
(318 mm)
WATLOW® 363
Circulation Heaters


14 in.
• WATROD or FIREBAR elements (356 mm)
12"-150#
• Without thermostat FLANGE (2) ¾ -10
UNC 2B
• General purpose enclosure Holes
5 in. Flange
Inlet & Outlet
75⁄8 in. # Part Ship Wt. “A” Dim. “B” Dim. “C” Dim.
Description Volts kW (193.7
Ph mm)Circ. Number Del. lbs (kg) in. (mm) in. (mm) in. (mm)
10 inch - 150 lb ANSI Flange (WATROD) 91⁄16 in. Ref.
163⁄16 in. Ref. (230.2 mm)
23 W/in2 480 90.0 3½ in.3 CFSS762E5S M 540 (245) 911/4 (2316.0) 751/2 (1916.0) 8115/16(2081.2)
(411.2 mm)
480 105.0 3 1 3 13
3 CFSS770N5S M 600 (645) 99 /8 (2517.8) 83 /8 (2117.7) 89 /16(2281.2)
27-Steel ½ in.
480 120.0 3 3 CFSS778N5S M 645 (293) 1065/8 (2708.3) 907/8 (2308.2) 975/16 (2471.7) NPT Drain
Elements
1411⁄16 2in. Ref. 14½ in. Ref.
(3.6 W/cm
(373.1)mm) (368 mm)
A Ref.
C
12
A Ref.
2½ in.
inch -NPT
150 lb ANSI Flange (WATROD)
Inlet C
7 B
23 W/in B2and Outlet

480 140.0 3 4 CFTS770L5S M 650 (295) 99 (2515) 827/8 (2105.0) 895/8 (2276.5)
Steel Tank ½ in.
480 160.0 3 4 CFTS778L5S M 700 (318) 1061/2 (2705) 903/8 (2295.5) 971/8 (2467.0) (13 mm)
36-Steel
Elements 3½ in.
(89 mm) 147⁄8 in.
(3.6 W/cm2) (2 Places) (377.8 mm)
¾-10 UNC 2B 10¾ in. 7⁄8 in. (22.2 mm) X
(Threads (273 mm) 2 in. (51 mm) Slot
(4 Places)
½ in. 4
23 W/in2 480 150.0 3 5NPTCFWS762A5S M 650 (295) 903/4 (2305) 741/2 (1891) 813/16 (2062.2)
Drain
Steel Tank 12½ in.
480 175.0 3 5 CFWS770J5S M 700 (318) 981/4 (2496) 82 (2081) 8811/16 (2252.7)
45-Steel (318 mm)
5¾ in.480 200.0 3 5 CFWS778J5S M 780 (354) 1053/4 (2686) 891/2 (2272) 963/16 (2443.2)
Elements(146 mm)
(3.6 W/cm2)
14 in. 15 in.
1215⁄16 in. (356 mm) (381 mm)
(328.6 mm) 12"-150#
FLANGE
(2) ¾ -10 (2) ¾ 14"-150#
-10
3 in. UNC FLANGE
2B (2) ¾ -10
UNC 2B UNC 2B
Flange Holes Holes
Inlet & 5 in. Flange Holes
Inlet & Outlet 6 in. Flange
Outlet Inlet & Outlet
11½ in.
(292 mm)
11½ in.
9 in. Ref. 91⁄16 in. Ref.
15¾ in. Ref. (292 mm)
(229 mm) 163⁄16 in. Ref. (230.2 mm)
(400 mm) (411.2 mm) 9¼ in. Ref.
165⁄16 in. Ref. (235 mm)
(414.3 mm)
½ in.
NPT Drain
½ in.
NPT Drain 9
A Ref.
C A Ref.
8 ½ in.
NPT Drain
B C A Ref.
B C
B
½ in.
(13 mm) ½ in.
(13 mm) 3½ in. ½ in.
(89 mm) (13 mm)
127⁄8 in.
(327 mm) 147⁄8 in.
7⁄8 in. (22.2 mm) X (377.8 mm)
2 in. (51 mm) Slot
4
4
4
12½ in.
(318 mm) 12½ in.
(318 mm) 12½ in.
(318 mm)
364 WATLOW®
Circulation Heaters

Application: Medium Weight Oils and Heat Transfer Oils

# Part Ship Wt. “A” Dim. “B” Dim. “C” Dim. 11/4 inch NPT Screw Plug
Description Volts kW Ph Del.
Circ. Number lbs (kg) in. (mm) in. (mm) in.
1 1/4 NPT (mm)
SCREW PLUG
11/4 inch NPT Screw Plug (FIREBAR) 1 1/4 NPT
15 W/in2 3 240 0.67 3 1 CBDNF13A29S M 25 (12) 245/8 (625.5) 15 SCREW PLUG
(381) 31/8 (79.4) 67⁄16 in. Ref.
(163.5 mm)
Steel Tank 240 0.83 3 1 CBDNF15J29S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4) 67⁄16 in. Ref.
1-Alloy 800 (163.5 mm)
240 1.00 3 1 CBDNF18A29S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
Elements
(2.3 W/cm )2 240 1.33 3 1 CBDNF22J29S M 31 (14) 325/8 (828.7) 23 1
(584) 3 /8 (79.4) ¾ in.
480 1.33 3 1 CBDNF22J30S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) NPT Inlet
¾ in.
and Outlet
240 1.67 3 1 CBDNF27J29S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) NPT Inlet
and Outlet A Ref.
480 1.67 3 1 CBDNF27J30S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) B A Ref.
240 2.00 3 1 CBDNF32J29S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) B
480 2.00 3 1 CBDNF32J30S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
240 2.67 3 1 CBDNF42A29S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
480 2.67 3 1 CBDNF42A30S M 69 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
240 3.33 3 1 CBDNF51J29S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1) C Ref.
C Ref.
480 3.33 3 1 CBDNF51J30S M 71 (33) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
½ in.
4 in. ½ in.
NPT
21/2 inch NPT Screw Plug (WATROD) 4 in. mm) NPT
(102 Drain
(102 mm) Drain
16 W/in2 3 240 2.0 3 1 CBLN717G12S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
Steel Tank 480 2.0 3 1 CBLN717G13S RS 24 (11) 343/4 (881) 221/2 (572) 161/2 (419)
3-Alloy 800
240 2.5 3 1 CBLN719R12S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419)
Elements 3¾3¾in.in.
(2.5 W/cm )2 480 2.5 3 1 CBLN719R13S RS 26 (12) 343/4 (881) 221/2 (572) 161/2 (419) (95
(95 mm)
mm)
240 3.0 3 1 CBLN724R12S RS 27 (13) 343/4 (881) 221/2 (572) 161/2 (419)
480 3.0 3 1 CBLN724R13S RS 27 (13) 343/4 (881) 221/2 (572) 161/2 (419) 21/2 inch NPT Screw Plug
240 4.0 3 1 CBLN732G12S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673)
480 4.0 3 1 CBLN732G13S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673)
240 5.0 3 1 CBLN739R12S RS 31 (14) 571/4 (1453) 45 22 1/2
(1143) 73⁄16in.in.Ref.
73⁄16 Ref.
1/2 NPT 39 (991) (182.6
(182.6mm) mm) 113⁄16
113⁄16
in. in.
480 5.0 3 1 CBLN739R13S RS 31 (14) 571/4 (1453) 45 SCREW
SCREW(1143)
PLUG 39 (991) (284.2 mm)
(284.2 mm)
240 6.0 3 1 CBLN747G12S RS 32 1
(15) 57 /4 (1453) 45 (1143) 39 (991) 11in.in.
NPTNPTInlet Inlet
480 6.0 3 1 CBLN747G13S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991) and Outlet
and Outlet
21/2 inch NPT Screw Plug (FIREBAR) A Ref.

B A Ref.
15 W/in2 3 240 2.00 3 1 CBLNF12A29S M 21 (10) 343/4 (881) 221/2 (572) 161/2 (419) B C
C
Steel Tank 240 2.50 3 1 CBLNF14J29S M 22 (10) 343/4 (881) 221/2 (572) 161/2 (419)
3-Alloy 800 1¼ in.
240 3.00 3 1 CBLNF17A29S M 23 (11) 343/4 (881) 221/2 (572) 161/2 (419) 1¼ in.
(32 mm)
Elements (32 mm)
(2.3 W/cm )2 240 4.00 3 1 CBLNF21J29S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419)
480 4.00 3 1 CBLNF21J30S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) 415⁄16 in.
240 5.00 3 1 CBLNF26J29S M 34 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) (125.4 415⁄16 in.
mm)
(125.4 mm) Ref.
480 5.00 3 1 CBLNF26J30S M 34 3 1 1
(16) 44 /4 (1135) 32 /2 (1129) 26 /2 (673) Ref. ½ in.
3 1 1 3⁄8 -16 UNC 55⁄8 in. ½ in.
NPT Drain
240 6.00 3 1 CBLNF31J29S M 35 (16) 44 /4 (1135) 32 /2 (1129) 26 /2 (673) (142.9 mm) NPT Drain
(Threads
3⁄8 -16 UNC 55⁄8 in.
480 6.00 3 1 CBLNF31J30S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) (4(Threads
Places) (142.9 mm)
31⁄8 in.
240 8.00 3 1 CBLNF41A29S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) (4 Places) (79.43mm)
1⁄8 in.
480 8.00 3 1 CBLNF41A30S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) (79.4 mm)
240 10.00 3 1 CBLNF50J29S M 52 (24) 633/4 (1618) 511/2 (1308) 461/2 (1181) 43⁄8 in.
(111.1 mm)
480 10.00 3 CBLNF50J30S M 52 (24) 633/4 (1618) 511/2 (1308) 461/2 (1181) 43⁄8 in.
(111.1 mm)
RAPID SHIP 3 Wired for 3-phase operation only
43⁄8 in.
• RS - Next day shipment • M - Manufacturing lead times (111.1 mm)
up to 5 pieces 3"-150# 43⁄8 in.
WATLOW® FLANGE
3"-150#
(111.1 mm)
365
FLANGE ½ in.
NPT Drain
73⁄16 in. Ref.
2 1/2 NPT (182.6 mm) 113⁄16 in.
1 in.
NPT Inlet
and Outlet
A Ref.
1¼ in.
(32 mm)
®
(125.4 mm)
Ref.
½ in.
3⁄8-16 UNC
Application: Medium Weight Oils and Heat Transfer Oils (Threads
(4 Places)
(142.9 mm)
31⁄8 in.
43⁄8 in.
(111.1 mm)
16 W/in2 3 240 2.00 3 1 CFMN718A12S RS 68 (31) 351/4 (894) 221/2 (573) 161FLANGE
/2 (419)
Steel Tank 480 2.00 3 1 CFMN718A13S RS 68 (31) 351/4 (894) 221/2 (573) 161/2 (419) ½ in.
240 2.50 3 1 CFMN720J12S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419)
Elements
(2.6 W/cm2) 480 2.50 3 1 CFMN720J13S RS 70 (32) 351/4 (894) 221/2 (573) 161/2 (419) 711⁄16 in. Ref.
240 3.00 3 1 CFMN725J12S M 78 (36) 451/4 (1148) 321/2 (826) 261/2 (673) (195.3 mm) 11½ in. Ref.
(292 mm)
480 3.00 3 1 1 1
1 CFMN725J13S M 78 (36) 45 /4 (1148) 32 /2 (826) 26 /2 (673) 1 in.
NPT Inlet
240 4.00 3 1 CFMN733A12S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) A Ref. & Outlet
B C
480 4.00 3 1 CFMN733A13S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673)
240 5.00 3 3
1 CFMN740J12S M 100 (46) 57 /4 (1465) 45 (1143) 39 (991) 1¼ in.
480 5.00 3 1 CFMN740J13S M 100 (46) 573/4 (1465) 45 (1143) 39 (991) (32 mm)
(2 Places)
240 6.00 3 1 CFMN748A12S M 107 (49) 573/4 (1465) 45 (1143) 39 (991) 3⁄8-16 UNC 55⁄8 in. Ref.
(Threads (142.9 mm)
480 6.00 3 1 CFMN748A13S M 107 (49) 573/4 (1465) 45 (1143) 39 (991) (4 Places)
½ in.
31⁄8 in. Dia. NPT
4 inch - 150 lb ANSI Flange (WATROD) (79.4 mm) Ref. Drain
16 W/in2 3 240 3.0 3 1 CFON713J12S M 122 (56) 39 (989) 201/2 (521) 17 (432)
Steel Tank 480 3.0 3 1 CFON713J13S M 122 (56) 39 (989) 201/2 (521) 17 (432)
6-Alloy 800
240 4.0 3 1 CFON718A12S M 125 (57) 39 (989) 201/2 (521) 17 (432)
Elements
(2.5 W/cm2) 480 4.0 3 1 CFON718A13S M 125 (57) 39 (989) 201/2 (521) 17 (432)
240 5.0 3 1 CFON720J12S M 127 (58) 39 (989) 201/2 (521) 17 (432)
480 5.0 3 1 CFON720J13S M 127 (58) 39 (989) 201/2 (521) 17 (432) 4 inch - 150 lb ANSI Flange
240 6.0 3 1 CFON725J12S M 160 (73) 39 (989) 201/2 (521) 17 (432)
4"-150# 513⁄16 in.
480 6.0 3 1 CFON725J13S M 160 (73) 39 (989) 201/2 (521)
FLANGE 17 (432) (147.6 mm)
240 8.0 3 1 CFON733A12S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699)
480 8.0 3 1 CFON733A13S M 163 (74) 491/2 (1256) 31 (787) 271/2 (699) ½ in.
240 10.0 3 1 CFON740J12S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232) NPT Drain
480 10.0 3 1 CFON740J13S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232)
240 12.0 3 1 CFON748A12S M 234 (107) 701/2 (1789) 52 (1321) 481/2 (1232) 125⁄8 in. Ref. 143⁄8 in. Ref.
(320.7 mm) (365.1 mm)
480 12.0 3 1 CFON748A13S M 234 1 1
(107) 70 /2 (1789) 52 (1321) 48 /2 (1232)
1½ in.
A Ref. NPT Inlet
4 inch - 150 lb ANSI Flange (FIREBAR) and Outlet
B C
15 W/in2 3 240 4.00 3 1 CFONF13G29S M 125 (57) 39 (989) 201/2 (521) 17 (432)
Steel Tank 240 5.00 3 1 CFONF16A29S M 128 (58) 39 (989) 201/2 (521) 17 (432)
6-Alloy 800 1¼ in.
240 6.00 3 1 CFONF18G29S M 130 (59) 39 (989) 201/2 (521) 17 (432) (32 mm)
Elements
(2.3 W/cm2) 240 8.00 3 1 CFONF22R29S M 133 (61) 39 (989) 201/2 (521) 17 (432) (2 Places)
3⁄8-16 UNC 65⁄8 in.
480 8.00 3 1 CFONF22R30S M 133 (61) 39 (989) 201/2 (521) 17 (432) (Threads (168.3 mm)
(4 Places)
240 10.00 3 1 CFONF27R29S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) ½ in.
311⁄16 in. NPT
480 10.00 3 1 CFONF27R30S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) (93.7 mm) Drain
240 12.00 3 1 CFONF32R29S M 170 1 1
(77) 49 /2 (1256) 31 (787) 27 /2 (699)
480 12.00 3 1 CFONF32R30S M 170 (77) 491/2 (1256) 31 (787) 271/2 (699)
59⁄16 in. Ref.
240 16.00 3 1 CFONF42G29S M 236 (107) 701/2 (1789) 52 (1321) 48 1/2 (1232)
5"-150#
(141.3 mm)
FLANGE
480 16.00 3 1 CFONF42G30S M 236 (107) 701/2 (1789) 52 (1321) 481/2 (1232)
½ in.
240 20.00 3 1 CFONF51R29S M 240 (109) 701/2 (1789) 52 (1321) 481/2 (1232) NPT Drain
480 20.00 3 1 CFONF51R30S M 240 (109) 701/2 (1789) 52 (1321) 481/2 (1232)
RAPID SHIP 3 Wired for 3-phase operation only

Truck Shipment only
125⁄8 in. Ref.
(320.7 mm)
C
• RS - Next day shipment up to 5 pieces • M - Manufacturing lead times
2 in.
366 NPT Inlet
and Outlet
WATLOW®
A Ref. 25 in.
B
(635 mm)
4"-150#
4"-150# 513⁄16
513⁄16 in.in.
FLANGE
FLANGE (147.6
(147.6 mm)
mm)
½½in.in.
NPT
NPT Drain
Drain
Circulation Heaters 5⁄85⁄8

1212 in.in.
(320.7
(320.7
Ref.
Ref.
mm)
mm)
3⁄8 3⁄8
1414 in.in.
(365.1
(365.1
Ref.
Ref.
mm)
mm)
1½1½
in.in.
A Ref. NPT
and
and
Inlet
Inlet
Outlet
Outlet ®
BB
®
CC
Circulation Heaters
1¼ 1¼in.in.
(32(32
mm)mm)
Application: Medium Weight Oils and Heat Transfer Oils 3⁄8-16
3⁄8-16 UNC
UNC
(2 (2
65⁄8
65⁄8
Places)
Places)
in.in.
(Threads
(Threads (168.3
(168.3 mm)mm)
• WATROD or FIREBAR elements (4 (4 Places)
Places)
½½
in.in.
311⁄16 in.in. NPT
NPT
(93.7
(93.7 mm)mm) Drain
Drain
5"-150# (mm) 59⁄16
59⁄16 in.in. Ref.
Ref.
5"-150#
(141.3
(141.3 mm)
mm)
FLANGE
16 W/in2 3 240 8.0 3 1 CFNN733A12S M 145 (66) 491/4 (1249) 30 (762) 25 (633.0) ½½in.in.
Steel Tank 480 8.0 3 1 CFNN733A13S M 145 (66) 491/4 (1249) 30 (762) 25 (633.0) NPT
NPT Drain
Drain
6-Alloy 800 240 10.0 3 1 CFNN740J12S M 167 (76) 561/4 (1427) 37 (940) 25 (633.0)
Elements 480 10.0 3 1 CFNN740J13S M 167 (76) 561/4 (1427) 37 (940) 25 (633.0)
(2.6 W/cm2) 5⁄85⁄8
1212 in.in. Ref.
Ref.
240 12.0 3 1 CFNN748A12S M 180 (82) 673/4 (1719) 481/2 (1232) 25 (633.0) (320.7
(320.7 mm)
mm)
CC
480 12.0 3 1 CFNN748A13S M 180 (82) 673/4 (1719) 481/2 (1232) 25 (633.0)
2 in.
2 in.
NPT
NPT Inlet
Inlet
5 inch - 150 lb ANSI Flange (WATROD) and Outlet
A Ref.and Outlet
A Ref.
16 W/in2 3 240 12.0 3 1 CFNN733A12XS M 150 (68) 491/4 (1249) 30 (762) 25 (633.0) 2525
in.in.
BB (635 mm)
(635 mm)
Steel Tank 480 12.0 3 1 CFNN733A13XS M 150 (68) 491/4 (1249) 30 (762) 25 (633.0)
9-Alloy 800 240 15.0 3 1 CFNN740J12XS M 173 (79) 561/4 (1427) 37 (940) 25 (633.0) 1¼
1¼ in.in.
Elements 480 15.0 3 1 CFNN740J13XS M 173 (79) 561/4 (1427) 37 (940) 25 (633.0) (32(32 mm)
mm)
(2.6 W/cm2) (2 (2 Places)
Places)
240 18.0 3 1 CFNN748A12XS M 188 (86) 673/4 (1719) 481/2 (1232) 25 (633.0)
480 18.0 3 1 CFNN748A13XS M 188 (86) 673/4 (1719) 481/2 (1232) 25 (633.0) 3⁄8-16
3⁄8-16 UNC
UNC 75⁄8
75⁄8 in.in.
(Threads
(Threads (193.7
(193.7 mm)mm)
(4 (4 Places)
Places)
6 inch - 150 lb ANSI Flange (WATROD) ½½
in.in.
NPT
NPT
16 W/in2 3 240 6.0 3 1 CFPN713G12S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) Drain
Drain
Steel Tank 480 6.0 3 1 CFPN713G13S M 212 (97) 401/2 (1027) 201/2 (521) 17 (432) 4¼ 4¼in.in.
12-Alloy 800 240 8.0 3 1 CFPN717R12S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432) (108
(108 mm)mm)
Elements 480 8.0 3 1 CFPN717R13S M 214 (97) 401/2 (1027) 201/2 (521) 17 (432)
(2.6 W/cm )2
240 10.0 3 1 CFPN720G12S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) 6 inch - 150 lb ANSI Flange
480 10.0 3 1 CFPN720G13S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) 65⁄8
65⁄8 in.in.
Ref.Ref.
240 12.0 3 1 CFPN725G12S M 222 (101) 401/2 (1027) 2016"-150#
/26"-150#
(521) 17 (432) (168.3
(168.3 mm) mm)
FLANGE
FLANGE
480 12.0 3 1 CFPN725G13S M 222 (101) 401/2 1
(1027) 20 /2 (521) 17 (432)
240 16.0 3 1 CFPN732R12S M 226 (103) 51 (1294) 31 (787) 271/2 (699) ½½ in.in.
NPTNPT Drain
Drain
480 16.0 3 1 CFPN732R13S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
240 20.0 3 2 CFPN740G12S M 290 (132) 72 1
(1827) 52 (1321) 48 /2 (1232)
480 20.0 3 1 CFPN740G13S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) 1212 11⁄16
11⁄16 in.in. Ref.
Ref. 14147⁄167⁄16
in.in. Ref.
Ref.
(322.3
(322.3 mm)
mm) (366.7
(366.7 mm)
mm)
240 24.0 3 2 CFPN747R12S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 24.0 3 1 CFPN747R13S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
2½2½
in.in.
NPT
NPT Inlet
Inlet
and
A Ref. and
A Ref. Outlet
Outlet
BB CC
16 W/in2 3 240 7.50 3 1 CFPN713G12XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 480 7.50 3 1 CFPN713G13XS M 215 (98) 401/2 (1027) 201/2 (521) 17 (432)
15-Alloy 800 240 10.0 3 1 CFPN717R12XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
Elements 3½ 3½ in.in.
480 10.0 3 1 CFPN717R13XS M 217 (99) 401/2 (1027) 201/2 (521) 17 (432) (89(89
mm)mm)
(2.6 W/cm )2
(2 (2 Places)
240 12.5 3 1 CFPN720G12XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432) Places)
¾-10 8¾ 8¾in.in.
480 12.5 3 1 CFPN720G13XS M 223 (102) 401/2 (1027) 201/2 (521) 17 (432) ¾-10 UNC
UNC 2B2B
(222
(222 mm)mm)
(Threads
(Threads
240 15.0 3 1 CFPN725G12XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) (4 Places)
(4 Places)
½½
in.in.
480 15.0 3 1 CFPN725G13XS M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) NPT
NPT
240 20.0 3 5 CFPN732R12XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) Drain
Drain
480 20.0 3 1 CFPN732R13XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) 4¾4¾in.in.
(121
(121 mm)mm)
240 25.0 3 5 CFPN740G12XS M 296 (135) 72 (1827) 1
52 (1321) 48 /2 (1232)
480 25.0 3 1 CFPN740G13XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
240 30.0 3 5 CFPN747R12XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)
480 30.0 3 1 CFPN747R13XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)
Truck Shipment only
WATLOW® 367
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C

NPT Inlet
A Ref. and Outlet
25 in.
B
(635 mm)
Circulation Heaters (32 mm)

(2 Places)
®
3⁄8-16 UNC 75⁄8 in.
(Threads (193.7 mm)
Application: Medium Weight Oils and Heat Transfer Oils (4 Places)
½ in.
NPT
6"-150#
6 inch - 150 lb ANSI Flange (FIREBAR) (168.3 mm)
FLANGE
15 W/in2 3 240 10.00 3 5 CFPNF13G29S M 217 (99) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank 240 12.50 3 ½ in.
5 CFPNF16A29S M 220 (100) 401/2 (1027) 201/2 (521) 17 (432) NPT Drain
15-Alloy 800
Elements 240 15.00 3 5 CFPNF18G29S M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
(2.3 W/cm )2 240 20.00 3 5 CFPNF22R29S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432) 1211⁄16 in. Ref. 147⁄16 in. Ref.
(322.3 mm) (366.7 mm)
480 20.00 3 5 CFPNF22R30S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
240 25.00 3 5 CFPNF27R29S M 232 (106) 51 (1294) 31 (787) 271/2 (699)
2½ in.
480 25.00 3 5 CFPNF27R30S M 232 (106) 51 (1294) 31 (787) 271/2 (699) NPT Inlet
A Ref. and Outlet
240 30.00 3 5 CFPNF32R29S M 236 (107) 51 (1294) 31 (787) 271/2 (699) B C
480 30.00 3 5 CFPNF32R30S M 236 (107) 51 (1294) 31 (787) 271/2 (699)
240 40.00 3 5 CFPNF42G29S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
480 40.00 3 5 CFPNF42G30S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232) 3½ in.
(89 mm)
240 50.00 3 5 CFPNF51R29S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232) (2 Places)
8¾ in.
480 50.00 3 5 CFPNF51R30S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232) ¾-10 UNC 2B (222 mm)
(Threads
(4 Places)
½ in.
8 inch - 150 lb ANSI Flange (WATROD) NPT
Drain
16 W/in2 3 240 17.00 3 1 CFRN725N12S M 350 (159) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) 4¾ in.
Steel Tank 480 17.00 3 1 CFRN725N13S M 350 (159) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0) (121 mm)
18-Alloy 800
Elements 240 25.00 3 2 CFRN735N12S M 380 (173) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
(2.6 W/cm )2 480 25.00 3 1 CFRN735N13S M 380 (173) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0)
75⁄8 in.
240 33.00 3 2 CFRN744E12S M 410 (186) 697/8 (1774.8) 4738"-150#
/8 (1203.3) 437/8 (1114.4) (193.7 mm)
FLANGE
480 33.00 3 1 CFRN744E13S M 410 (186) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
240 42.00 3 3 CFRN754M12S M 445 (202) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) ½ in.
NPT Drain
480 42.00 3 2 CFRN754M13S M 445 (202) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
480 50.00 3 2 CFRN763M13S M 490 (223) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3)
480 58.00 3 2 CFRN773D13S M 530 (241) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) 1411⁄16 in. Ref. 14½ in. Ref.
(373.1 mm) (368 mm)
480 67.00 3 2 CFRN782M13S M 560 (254) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
2½ in.
A Ref. NPT Inlet
8 inch - 150 lb ANSI Flange (WATROD) B and Outlet
C
16 W/in2 3 240 23.0 3 2 CFRN726D12XS M 358 (163) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
Steel Tank 480 23.0 3 1 CFRN726D13XS M 358 (163) 551/4 (1402.0) 323/4 (830.0) 291/4 (741.0)
24-Alloy 800 3½ in.
Elements 240 33.0 3 2 CFRN736D12XS M 392 (178) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) (89 mm)
(2 Places)
(2.6 W/cm )2 480 33.0 3 1 CFRN736D13XS M 392 (178) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) ¾-10 UNC 2B 10¾ in.
(Threads
240 44.0 3 4 CFRN744M12XS M 425 (193) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) (4 Places)
(273 mm)
480 44.0 3 2 CFRN744M13XS M 425 (193) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) ½ in.
NPT
240 56.0 3 4 CFRN754M12XS M 463 (210) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) Drain
480 56.0 3 2 CFRN754M13XS M 463 (210) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
5¾ in.
480 67.0 3 2 CFRN763M13XS M 511 (232) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) (146 mm)
480 77.0 3 2 CFRN773D13XS M 554 (252) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
480 89.0 3 4 CFRN782M13XS M 587 (267) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3)
Truck Shipment only
10"-150# 1215⁄16 in.
FLANGE (328.6 mm)
(2) ¾ -10
3 in.
368 Flange WATLOW UNC ®2B
Holes
Inlet &
Outlet
Circulation Heaters

Application: Medium Weight Oils and Heat Transfer Oils

• WATROD or FIREBAR elements 14 in.
(356 mm)
• Without thermostat 12"-150#
FLANGE (2) ¾ -10
• General purpose enclosure UNC 2B
Holes
5 in. Flange
Inlet & Outlet
75⁄8 in. # Part Ship Wt. “A” Dim. “B” Dim. “C” Dim.
Description Volts kW (193.7
Ph mm) Circ.
Number Del. lbs (kg) in. (mm) in. (mm) in. (mm)
10 inch - 150 lb ANSI Flange (WATROD) 91⁄16 in. Ref.
16 W/in2 3 480 75.0 3½ in. 3 CFSN763N13S M 540 (245) 913/16 (2316) 757/16 (1916) 8115/16 (2081) 163⁄16 in. Ref. (230.2 mm)
(411.2 mm)
480 87.0 3 3 CFSN773E13S M 600 (273) 1069/16 (2707) 9013/16 (1037) 975/16 (2471)
27-Alloy 800 ½ in.
Elements NPT Drain
1411⁄16 2in.
(2.6 W/cm ) Ref. 14½ in. Ref.
(373.1 mm) (368 mm)
A Ref.
C
2½ in.
A Ref. 2 NPT Inlet 7 B
16 W/in 3 480 117.0 3

B and Outlet 3 C CFTN773C13S M 650 (295) 1061/2 (2705) 903/8 (2295.5) 973/16 (2468.6)
Steel Tank ½ in.
36-Alloy 800 (13 mm)
Elements 3½ in.
(2.6 W/cm2) (89 mm) 147⁄8 in.
(2 Places) (377.8 mm)
¾-10 UNC 2B 10¾ in. 7⁄8 in. (22.2 mm) X
(Threads 2 in. (51 mm) Slot
(273 mm)
14 (4 Places)
inch - 150 lb ANSI Flange (WATROD)
½ in. 4
16 W/in2 3 480 105.0 3 3NPT CFWN754J13S M 600 (273) 831/4 (2115) 67 (1700) 7311/16 (1872)
Steel Tank Drain
480 125.0 3 5 CFWN763J13S M 650 (295) 903/4 (2305) 741/2 (1891) 813/16 (2062) 12½ in.
45-Alloy 800 (318 mm)
Elements 5¾ in.
(146 mm)
(2.6 W/cm2)
• M - Manufacturing lead times 3 Wired for 3-phase operation only Truck Shipment only
14 in. 15 in.
0"-150# 1215⁄16 in. (356 mm) (381 mm)
ANGE (328.6 mm) 12"-150#
FLANGE
(2) ¾ -10 (2) ¾ 14"-150#
-10
3 in. UNC FLANGE
2B (2) ¾ -10
UNC 2B UNC 2B
Flange Holes Holes
Inlet & 5 in. Flange Holes
Outlet Inlet & Outlet
11½ in.
(292 mm)
11½ in.
9 in. Ref. 91⁄16 in. Ref. (292 mm)
15¾ in. Ref. (229 mm) 163⁄16 in. Ref. (230.2 mm)
(400 mm) (411.2 mm) 9¼ in. Ref.
165⁄16 in. Ref. (235 mm)
(414.3 mm)
½ in.
NPT Drain
½ in.
NPT Drain 9
A Ref.
C A Ref.
8 ½ in.
NPT Drain
B C A Ref.
B C
B
½ in.
(13 mm) ½ in.
(13 mm) 3½ in. ½ in.
(89 mm) (13 mm)
127⁄8 in.
(327 mm) 147⁄8 in.
7⁄8 in. (22.2 mm) X (377.8 mm)
2 in. (51 mm) Slot
4
4 4
12½ in.
(318 mm) 12½ in.
(318 mm) 12½ in.
(318 mm)
WATLOW® 369
Circulation Heaters

Application: Bunker C, Asphalt and #6 Fuel Oil

# Part Ship Wt. “A” Dim. “B” Dim. 11/4 inch NPT Screw Plug
1 1/4 NPT “C” Dim.
SCREW PLUG (mm)
1 1/4 NPT
11/4 inch NPT Screw Plug (FIREBAR) SCREW PLUG 67⁄16 in. Ref.
8 W/in2 3 (163.5 mm)
240 0.43 3 1 CBDNF16G22S M 26 (12) 245/8 (625.5) 15 (381) 31/8 (79.4) 67⁄16 in. Ref.
Steel Tank (163.5 mm)
240 0.55 3 1 CBDNF19G22S M 30 (14) 325/8 (828.7) 23 (584) 31/8 (79.4)
1-Alloy 800
Element 240 0.70 3 1 CBDNF24L22S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) ¾ in.
(1.3 W/cm2) 480 0.70 3 1 CBDNF24L21S M 31 (14) 325/8 (828.7) 23 (584) 31/8 (79.4) NPT Inlet
¾ in.Outlet
and
NPT Inlet
240 0.88 3 1 CBDNF29R22S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) and Outlet A Ref.
480 0.88 3 1 CBDNF29R21S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1) B A Ref.
B
240 1.08 3 1 CBDNF34R22S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
480 1.08 3 1 CBDNF34R21S M 44 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)
240 1.40 3 1 CBDNF45G22S M 69 (31) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
480 1.40 3 1 CBDNF45G21S M 69 (31) 635/8 (1616.1) 53 (1346) 43/8 (111.1)
C Ref.
240 1.80 3 1 CBDNF55R22S M 71 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) C Ref.
480 1.80 3 1 CBDNF55R21S M 71 (32) 635/8 (1616.1) 53 (1346) 43/8 (111.1) ½ in.
4 in. ½ in.
NPT
4(102
in. mm)NPTDrain
(102 mm) Drain
8 W/in2 3 240 2.0 3 1 CBLS732E12S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673)
Steel Tank
480 2.0 3 1 CBLS732E13S RS 29 (14) 443/4 (1135) 321/2 (1129) 261/2 (673) 3¾3¾in. in.
3-Steel
240 3.0 3 1 CBLS747E12S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991) (95(95
mm)mm)
Elements
(1.3 W/cm2) 480 3.0 3 1 CBLS747E13S RS 32 (15) 571/4 (1453) 45 (1143) 39 (991)
21/2 inch NPT Screw Plug
3 Wired for 3-phase operation only
RAPID SHIP
22 1/2
1/2NPT
NPT
73⁄16
73⁄16
(182.6
in.in.
(182.6mm)
Ref.
Ref.
mm) 113⁄16 3⁄16 in.
11in.
SCREW
SCREWPLUGPLUG (284.2 mm)mm)
(284.2
up to 5 pieces
1 in.
1 in.
• M - Manufacturing lead times NPT
NPT Inlet
Inlet
and
andOutlet
Outlet
A Ref.
B A Ref.
B C
C
1¼ in.
1¼ in.
(32 mm)
(32 mm)
415⁄16 in.
415⁄16
(125.4 mm)in.
(125.4 mm)Ref.
Ref. ½ in.
3⁄8-16 UNC 55⁄8 in. ½ in.
NPT Drain
(Threads (142.955⁄8
mm)in. NPT Drain
3⁄8-16 UNC
(4 (Threads
Places) (142.9 mm)
31⁄8 in.
(4 Places) (79.4 3mm)
1⁄8 in.
(79.4 mm)
43⁄8 in.
(111.1 mm)
43⁄8 in.
(111.1 mm)
43⁄8 in.
(111.1 mm)
3"-150# 43⁄8 in.
FLANGE (111.1 mm)
370 3"-150#
FLANGE
WATLOW
½ in.
®
NPT Drain
(163.5 mm)
67⁄16 in. Ref.
(163.5 mm)
¾ in.
NPT Inlet
¾ in.
and Outlet
NPT Inlet
and Outlet A Ref.
B A Ref.
Circulation Heaters B

Circulation Heaters C Ref. ®
½ in.
4 in. NPT
½ in.
(102 4mm)
in. Drain
NPT
(102 mm)
Application: Bunker C, Asphalt and #6 Fuel Oil Drain

3¾ in.
• Without thermostat (95 3mm)
¾ in.
“B” Dim. “C” Dim. 2 ⁄2 inch NPT Screw Plug

1
# Part Ship Wt. “A” Dim.
21/2 inch NPT Screw Plug (FIREBAR) 73⁄16 in. Ref.
8 W/in2 3
2 1/2 NPT 73⁄16 mm)
(182.6 in. Ref. 113⁄16 in.
240 1.25 3 1 CBLNF15C22S M 22 (10) 343/4 (881) 22 1/2 (572) 161/2 (419)
SCREW 2 PLUG
1/2 NPT (182.6 mm)
Steel Tank 240 1.63 3 113⁄16
(284.2 mm)in.
1 CBLNF18C22S M 23 (10) 343/4 (881) 221SCREW PLUG
/2 (572) 161/2 (419) (284.2 mm)
3-Alloy 800 1 in.
Elements 240 2.13 3 1 CBLNF23C22S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) NPT 1 in.
Inlet
NPT Inlet
and Outlet
(1.3 W/cm2) 480 2.13 3 1 CBLNF23C21S M 31 (14) 343/4 (881) 221/2 (572) 161/2 (419) and Outlet
240 2.63 3 1 CBLNF28L22S M 34 (15) 443/4 (1135) 321/2 (1129) 261/2 (673) A Ref.
B A Ref.
480 2.63 3 1 CBLNF28L21S M 34 (15) 443/4 (1135) 321/2 (1129) 261/2 (673) B C
C
240 3.19 3 1 CBLNF33L22S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673)
1¼ in.
480 3.19 3 1 CBLNF33L21S M 35 (16) 443/4 (1135) 321/2 (1129) 261/2 (673) ¼ in.
(321mm)
(32 mm)
240 4.25 3 1 CBLNF44C22S M 44 (20) 571/4 (1453) 45 (1143) 39 (991)
480 4.25 3 1 CBLNF44C21S M 44 (20) 571/4 (1453) 45 (1143) 39 (991) 415⁄16 in.
415⁄16 in.
240 5.38 3 1 CBLNF54L22S M 52 (24) 633/4 (1453) 511/2 (1308) 461/2 (1181) (125.4 mm)
(125.4 mm)Ref.
Ref.
480 5.38 3 1 CBLNF54L21S M 52 (24) 633/4 (1453) 511/2 (1308) 461/2 (1181) ½½in.in.
3⁄8-16 UNC
3⁄8-16 UNC 55⁄8 in. NPT Drain
(Threads (142.9 mm)
(142.9 mm)
(Threads
3 inch - 150 lb ANSI Flange (WATROD) (4 Places)
(4 Places) 31⁄8 in.in.
31⁄8
8 W/in2 3 240 2.0 3 1 CFMS733A12S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673) (79.4
(79.4mm)
mm)
Steel Tank 480 2.0 3 1 CFMS733A13S M 96 (44) 451/4 (1148) 321/2 (826) 261/2 (673)
3-Steel 43⁄8 in.in.
43⁄8
240 3.0 3 1 CFMS748A12S M 107 (49) 573/4 (1465) 45 (1143) 39 (991) (111.1 mm)
Elements (111.1 mm)
(1.3 W/cm2) 480 3.0 3 1 CFMS748A13S M 107 (49) 573/4 (1465) 45 (1143) 39 (991)
• M - Manufacturing lead times 3 Wired for 3-phase operation only 43⁄8 in.in.
43⁄8
(111.1
(111.1 mm)mm)
3"-150#
Truck Shipment only
3"-150#
FLANGE
FLANGE
½½in.in.
NPT
NPTDrain
Drain
711⁄16
711⁄16
in.in.
Ref.
Ref.
(195.3
(195.3mm)
mm) ½½
1111 in.in.
Ref.
Ref.
(292
(292 mm)mm)
1 in.
1 in.
NPT
NPT Inlet
Inlet
A Ref.
A Ref. & Outlet
& Outlet
B B CC
1¼1¼in.in.
(32
(32 mm)mm)
(2(2 Places)
Places)
3⁄8-16
3⁄8-16 UNCUNC 55⁄8
55⁄8 in.in. Ref.
Ref.
(Threads
(Threads (142.9
(142.9 mm)mm)
(4 Places)
(4 Places)
½½
in.in.
31⁄831⁄8
in.in. Dia.
Dia. NPT
NPT
(79.4
(79.4 mm) mm) Ref.
Ref. Drain
Drain
WATLOW® 371
Circulation Heaters


Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in (mm) in. (mm)
4"-150# 513⁄16 in.
8 W/in2 3 240 5.00 3 1 CFOS740J12S M 229 (104) 701/2 (1789) 52 (1321) 481/2 (1232)
Steel Tank 513⁄16 in.
480 5.00 3 1 CFOS740J13S M 229 (104) 701/2 (1789) 52 (1321)
4"-150# 481/2 (1232) (147.6
6-Steel FLANGE ½ mm)
in.
240 6.00 3 1 CFOS748A12S M 234 (106) 701/2 (1789) 52 (1321) 481/2 (1232) NPT Drain
Elements
(1.3 W/cm2) 480 6.00 3 1 CFOS748A13S M 234 (106) 701/2 (1789) 52 (1321) 481/2 (1232)
240 8.00 3 1 CFOS764J12S M 298 (135) 911/2 (2326) 73 (1854) 66 (1676) 125⁄8 in. Ref. ½ in.
143⁄8Drain
NPT in. Ref.
(320.7 mm) (365.1 mm)
480 8.00 3 1 CFOS764J13S M 298 (135) 911/2 (2326) 73 (1854) 66 (1676)
240 10.00 3 1 CFOS777A12S M 306 (139) 911/2 2326) 73 (1854) 66 (1676)
1½
125⁄8 in.in.
Ref. 143⁄8 in. Ref.
480 10.00 3 1 CFOS777A13S M 306 (139) 911/2 (2326) 73 (1854) 66 (1676) NPT mm)
A Ref. (320.7 Inlet
(365.1 mm)
and Outlet
B C
4 inch - 150 lb ANSI Flange (FIREBAR) 1½ in.
A Ref. NPT Inlet
8 W/in2 3 240 2.50 3 1 CFONF16J22S M 128 (58) 39 (989) 201/2 (521) 17 (432) and Outlet 1¼ in.
B (32 mm) C
Steel Tank 240 3.25 3 1 CFONF19J22S M 130 (59) 39 (989) 201/2 (521) 17 (432) (2 Places)
6-Alloy 800 3⁄8-16 UNC 65⁄8 in.
240 4.25 3 1 CFONF24J22S M 133 (61) 39 (989) 201/2 (521) 17 (432) (Threads
Elements (4 Places)
(168.3 mm)
1¼ in.
(1.3 W/cm2) 480 4.25 3 1 CFONF24J21S M 133 (61) 39 (989) 201/2 (521) 17 (432) ½(32 in. mm)
240 5.25 3 1 CFONF30A22S M 168 (77) 491/2 (1256) 31 (787) 271/2 (699) 311⁄16 in. NPT
(2 Places)
3⁄8-16 (93.7
UNC mm) 65⁄8Drain
in.
480 5.25 3 1 CFONF30A21S M 168 1
(77) 49 /2 (1256) 31 (787) 271/2 (699) (Threads (168.3 mm)
1 (4 Places)
240 6.38 3 1 CFONF35A22S M 170 (77) 49 /2 (1256) 31 (787) 271/2 (699) ½ in.
1 311⁄16 in. NPT
480 6.38 3 1 CFONF35A21S M 170 (77) 49 /2 (1256) 31 271/2 (699)
(787) 5"-150# (93.7 mm) 59⁄16 in. Ref.
Drain
(141.3 mm)
240 8.50 3 1 CFONF45J22S M 236 (107) 701/2 (1789) 52 (1321) FLANGE
481/2 (1232)
480 8.50 3 1 CFONF45J21S M 236 (107) 701/2 (1789) 52 (1321) 481/2 (1232) 5 inch - 150 lb ANSI Flange
½ in.
240 10.75 3 1 CFONF56A22S M 240 (109) 701/2 (1789) 52 (1321) 5"-150#
481/2 (1232) 5NPT
9⁄16 in.Drain
Ref.
(141.3 mm)
480 10.75 3 1 CFONF56A21S M 240 (109) 70 /2 (1789) 52 (1321) 481/2 (1232)
1 FLANGE
125⁄8 in. Ref. ½ in.
(320.7 mm)
NPT Drain
C
8 W/in2 3 240 5.00 3 1 CFNS740J12S M 167 (76) 561/4 (1427.0) 37 (940.0) 25 (633.0) 2 in.
Steel Tank 480 5.00 3 1 CFNS740J13S M 167 (76) 561/4 (1427.0) 37 (940.0) 25 (633.0) 125⁄8
NPT
in. Inlet
Ref.
and mm)
A Ref.(320.7 Outlet
6-Steel 25 in.C
240 6.00 3 1 CFNS748A12S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) B
(635 mm)
Elements
(1.3 W/cm2) 480 6.00 3 1 CFNS748A13S M 180 (82) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) 2 in.
240 8.00 3 1 CFNS764J12S M 195 (89) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) NPT Inlet 1¼ in.
A Ref. and Outlet (32 mm)
480 8.00 3 1 CFNS764J13S M 195 (89) 811/8 (2060.6) 617/8 (1571.6) 25 (633.0) B
25 in.
(2 Places)
(635 mm)
240 10.00 3 1 CFNS777A12S M 220 (100) 941/8 (2390.8) 75 (1902.0) 25 (633.0) 75⁄8 in.
3⁄8-16 UNC
480 10.00 3 1 CFNS777A13S M 220 (100) 941/8 (2390.8) 75 (1902.0) 25 (633.0) (Threads (193.7 1mm)¼ in.
(4 Places)
½(32in.mm)
(2 Places)
NPT
5 inch - 150 lb ANSI Flange (WATROD) Drain
75⁄8 in.
8 W/in2 3 240 7.5 3 1 CFNS740J12XS M 173 (79) 561/4 (1427.0) 37 (940.0) 25 (633.0) 3⁄8-16 UNC4¼ in. (193.7 mm)
(Threads
Steel Tank 480 7.5 3 1 CFNS740J13XS M 173 (79) 561/4 (1427.0) 37 (940.0) 25 (108 mm)
(633.0) (4 Places) ½ in.
9-Steel
240 9.0 3 1 CFNS748A12XS M 188 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0) NPT
Elements Drain
(1.3 W/cm2) 480 9.0 3 1 CFNS748A13XS M 188 (86) 673/4 (1719.0) 481/2 (1232.0) 25 (633.0)
4¼ in. 65⁄8 in. Ref.
240 12.0 3 1 CFNS764J12XS M 206 (94) 811/8 (2060.6) 617/8 (6"-150#
1571.6) 25 (633.0) (108 mm) (168.3 mm)
480 12.0 3 1 CFNS764J13XS M 206 (94) 811/8 (2060.6) 617/8 (FLANGE
1571.6) 25 (633.0)
240 15.0 3 1 CFNS777A12XS M 233 (106) 941/8 (2390.8) 75 (1902.0) 25 (633.0) ½ in.
NPT Drain
480 15.0 3 1 CFNS777A13XS M 233 (106) 941/8 (2390.8) 75 (1902.0) 25 (633.0)
65⁄8 in. Ref.
6"-150#
• M - Manufacturing lead times 3 Wired for 3-phase operation only (168.3 mm)
FLANGE 1211⁄16 in. Ref. 147⁄16 in. Ref.
Truck Shipment only (322.3 mm) (366.7 mm)
½ in.
NPT Drain
2½ in.
NPT Inlet
372 A Ref. and Outlet
1211⁄16 in.
B
Ref.WATLOW ®
147⁄16 C
in. Ref.
(322.3 mm) (366.7 mm)
FLANGE
½ in.
NPT Drain
125⁄8 in. Ref.

(320.7 mm)
C

NPT Inlet
A Ref. and Outlet
25 in.
B
(635 mm)

Circulation Heaters (32 mm) ®
(2 Places)
3⁄8-16 UNC 75⁄8 in.

(Threads (193.7 mm)
Application: Bunker C, Asphalt and #6 Fuel Oil (4 Places)
½ in.
NPT
6"-150#
(168.3 mm)
8 W/in2 3 240 8.00 3 1 CFPS732R12S M 226 (103) 51 (1294) 31 (787) 271/2 (699)
Steel Tank ½ in.
480 8.00 3 1 CFPS732R13S M 226 (103) 51 (1294) 31 (787) 271/2 (699) NPT Drain
12-Steel
Elements 240 10.00 3 1 CFPS740G12S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232)
(1.3 W/cm2) 480 10.00 3 1211⁄16 in. Ref. 147⁄16 in. Ref.
1 CFPS740G13S M 290 (132) 72 (1827) 52 (1321) 481/2 (1232) (322.3 mm) (366.7 mm)
240 12.00 3 1 CFPS747R12S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232)
480 12.00 3 1 CFPS747R13S M 298 (136) 72 (1827) 52 (1321) 481/2 (1232) 2½ in.
NPT Inlet
240 16.50 3 1 CFPS764G12S M 360 (164) 93 (2361) 73 (1854) 66 (1676) A Ref. and Outlet
B C
480 16.50 3 1 CFPS764G13S M 360 (164) 93 (2361) 73 (1854) 66 (1676)
480 20.00 3 1 CFPS776R13S M 368 (167) 93 (2361) 73 (1854) 66 (1676)
3½ in.
6 inch - 150 lb ANSI Flange (WATROD) (89 mm)
(2 Places)
8 W/in2 3 240 10.00 3 1 CFPS732R12XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) ¾-10 UNC 2B 8¾ in.
Steel Tank (Threads (222 mm)
480 10.00 3 1 CFPS732R13XS M 288 (131) 51 (1294) 31 (787) 271/2 (699) (4 Places)
15-Steel ½ in.
Elements 240 12.50 3 1 CFPS740G12XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232) NPT
Drain
(1.3 W/cm2) 480 12.50 3 1 CFPS740G13XS M 296 (135) 72 (1827) 52 (1321) 481/2 (1232)
4¾ in.
240 15.00 3 1 CFPS747R12XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232) (121 mm)
480 15.00 3 1 CFPS747R13XS M 306 (139) 72 (1827) 52 (1321) 481/2 (1232)

240 21.00 3 5 CFPS764G12XS M 370 (168) 93 (2361) 73 (1854) 66 (1676)
480 21.00 3 1 CFPS764G13XS M 370 (168) 93 (2361) 73 (1854) 66 (1676)
240 25.00 3 5 CFPS776R12XS M 381 (173) 93 (2361) 73 (1854) 66 (1676)
480 25.00 3 1 CFPS776R13XS M 381 (173) 93 (2361) 73 (1854) 66 (1676)
6 inch - 150 lb ANSI Flange (FIREBAR)

8 W/in2 3 240 6.3 3 5 CFPNF16J22S M 220 (100) 401/2 (1027) 201/2 (521) 17 (432)
Steel Tank
240 8.1 3 5 CFPNF19J22S M 223 (102) 401/2 (1027) 201/2 (521) 17 (432)
15-Alloy 800
Elements 240 10.6 3 5 CFPNF24J22S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
(1.3 W/cm2) 480 10.6 3 5 CFPNF24J21S M 226 (103) 401/2 (1027) 201/2 (521) 17 (432)
240 13.1 3 5 CFPNF30A22S M 232 (106) 51 (1294) 31 (787) 271/2 (699)
480 13.1 3 5 CFPNF30A21S M 232 (106) 51 (1294) 31 (787) 271/2 (699)
240 16.0 3 5 CFPNF35A22S M 236 (107) 51 (1294) 31 (787) 271/2 (699)
480 16.0 3 5 CFPNF35A21S M 236 (107) 51 (1294) 31 (787) 271/2 (699)
240 21.3 3 5 CFPNF45J22S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
480 21.3 3 5 CFPNF45J21S M 304 (138) 72 (1827) 52 (1321) 481/2 (1232)
240 26.0 3 5 CFPNF56A22S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232)
480 26.0 3 5 CFPNF56A21S M 314 (143) 72 (1827) 52 (1321) 481/2 (1232)
Truck Shipment only
WATLOW® 373
Circulation Heaters


8"-150#
75⁄8 in.
Description Volts kW Ph Circ. Number Del. lbs (kg) in. (mm) in. FLANGE
(mm) in. (mm) (193.7 mm)
75⁄8 in.
8"-150#
FLANGE
8 W/in2 3 240 12.5 3 1 CFRS743E12S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) ½ in.
Steel Tank NPT
½ Drain
in.
480 12.5 3 1 CFRS743E13S M 410 (186) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) NPT Drain
18-Steel
Elements 240 16.5 3 1 CFRS751M12S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
1411⁄16 in. Ref. 14½ in. Ref.
(1.3 W/cm2) 480 16.5 3 1 CFRS751M13S M 440 (200) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) (373.1 mm)
1411⁄16 in. Ref.
(368 mm)
14½ in. Ref.
(373.1 mm) (368 mm)
240 20.0 3 2 CFRS762D12S M 480 (218) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
2½ in.
480 20.0 3 1 CFRS762D13S M 480 (218) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) A Ref. NPT Inlet C
2½Outlet
in.
A Ref.B and
240 24.0 3 2 CFRS770M12S M 530 (241) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3) NPT Inlet C
B and Outlet
480 24.0 3 1 CFRS770M13S M 530 (241) 883/8 (2244.7) 657/8 (1673.2) 623/8 (1584.3)
3½ in.
240 27.0 3 2 CFRS779M12S M 610 (277) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) (89 mm)
½ in.
(2 3Places)
480 27.0 3 1 CFRS779M13S M 610 (277) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) ¾-10 UNC 2B (89 mm)
(Threads (2¾
10 in.
Places)
¾(4
-10Places)
UNC 2B (273
10¾mm) in.
(Threads (273 mm)
8 inch - 150 lb ANSI Flange (WATROD) (4 Places) ½ in.
NPT
½ in.
8 W/in2 3 240 17.0 3 1 CFRS743M12XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) Drain
NPT
Steel Tank Drain
480 17.0 3 1 CFRS743M13XS M 425 (193) 621/4 (1580.0) 393/4 (1008.0) 361/4 (919.0) 5¾ in.
24-Steel (146 mm)
Elements 240 22.0 3 2 CFRS751M12XS M 457 (208) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4) 5¾ in.
(146 mm)
(1.3 W/cm2) 480 22.0 3 1 CFRS751M13XS M 457 (208) 697/8 (1774.8) 473/8 (1203.3) 437/8 (1114.4)
240 27.0 3 2 CFRS762D12XS M 461 (209) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7)
480 27.0 3 1 CFRS762D13XS M 461 (209) 793/8 (2016.1) 567/8 (1444.6) 533/8 (1355.7) 10 inch - 150 lb ANSI Flange
240 32.0 3 2 CFRS770M12XS M 554 (252) 883/8 (2244.7) 657/8 (1673.2) 62
10"-150#
3/8 (1584.3)
1215⁄16 in.
(328.6 mm)
480 32.0 3 1 CFRS770M13XS M 554 (252) 883/8 (2244.7) 657/8 (1673.2) 62
10"-150# 3/8 (1584.3)
FLANGE 1215⁄16 in.
FLANGE (328.6 mm)(2) ¾ -10
240 36.0 3 2 CFRS779M12XS M 636 (289) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) 3 in. UNC 2B
Flange (2) ¾ -10
Holes
3 in.&
Inlet UNC 2B
480 36.0 3 1 CFRS779M13XS M 636 (289) 983/8 (2498.7) 757/8 (1927.2) 723/8 (1838.3) Flange Holes
Outlet
Inlet & 11½ in.
Outlet (292 mm)
11½ in.
10 inch - 150 lb ANSI Flange (WATROD) (292 mm) 9 in. Ref.
15¾ in. Ref. (229
8 W/in2 3 9 in.mm)
Ref.
240 30.0 3 3 CFSS762E12S M 540 (245) 911/4 (2316.0) 751/2 (1916.0) 821/4 (2088.0) (400 mm)
15¾ in. Ref. (229 mm)
Steel Tank (400 mm)
480 30.0 3 1 CFSS762E13S M 540 (245) 911/4 (2316.0) 751/2 (1916.0) 821/4 (2088.0) ½ in.
27-Steel
240 35.0 3 3 CFSS770N12S M 600 (273) 991/8 (2517.8) 833/8 (2117.7) 8913/16 (2281.2) NPT Drain
Elements ½ in.
NPT Drain
(1.3 W/cm2) 480 35.0 3 1 CFSS770N13S M 600 (273) 991/8 (2517.8) 833/8 (2117.7) 8913/16 (2281.2) A Ref.
A Ref. C
240 40.0 3 3 CFSS778N12S M 645 (293) 1065/8 (2708.3) 907/8 (2308.2) 975/16 (2471.7) B
C
B
480 40.0 3 1 CFSS778N13S M 645 (293) 1065/8 (2708.3) 907/8 (2308.2) 975/16 (2471.7)
½ in.
• M - Manufacturing lead times 3 Wired for 3-phase operation only (13 mm)
½ in.
Truck Shipment only (13 mm)
127⁄8 in.
(327 mm)
127⁄8 in.
(327 mm) 7⁄8 in. (22.2 mm) X
2 in. (51 mm) Slot
7⁄8 in. (22.2 mm) X
2 in. (51 mm) Slot
4
4
12½ in.
(318 mm)
12½ in.
(318 mm)
374 WATLOW®
Circulation Heaters

14 in.
Application: Bunker12"-150#
C, Asphalt and #6 Fuel
FLANGE
Oil
(356 mm)
(2) ¾ -10
UNC 2B
• WATROD or FIREBAR elements Holes
• Without thermostat 5 in. Flange
Inlet & Outlet
91⁄16 in. Ref.
# Part Ship Wt.
163⁄16 in. Ref. “A”(230.2
Dim.mm) “B” Dim. “C” Dim.
(411.2 mm)
8 W/in2 3 240 47.0 3 3 CFTS770L12S
½ in.
NPT Drain
M 700 (318) 99 (2515) 827/8 (2105.0) 895/8 (2277)
9
Steel Tank
480 47.0 3 2 CFTS770L13SA Ref. M 700 (318) 99 (2515) 827/8 (2105.0) 895/8 (2277)
36-Steel C
Elements 240 54.0 3 3 CFTS778L12S M B 750 (341) 1061/2 (2705) 903/8 (2295.5) 971/8 (2467)
(1.3 W/cm ) 480 54.0 3
2
2 CFTS778L13S M 750 (341) 1061/2 (2705) 903/8 (2295.5) 971/8 (2467)
½ in.
(13 mm)

(377.8 mm)
8 W/in2 3 240 60.0 3 3 CFWS770J12S M 700 (318) 9817⁄8/4in.
(2496) 82 X (2081) 8811/16 (2253)
(22.2 mm)
Steel Tank 2 in. (51 mm) Slot
480 60.0 3 3 CFWS770J13S M 700 (318) 981/4 (2496) 82 (2081) 8811/16 (2253)
45-Steel 4
Elements 240 67.0 3 5 CFWS778J12S M 780 (354) 1053/4 (2686) 891/2 (2272) 963/16 (2443)
(1.3 W/cm2) 480 67.0 3 3 CFWS778J13S M 780 (354) 1053/4 (2686) 891/2 (2272) 963/16 (2443)
12½ in.
(318 mm)

Truck Shipment only
12 inch - 150 lb ANSI Flange 14 inch - 150 lb ANSI Flange

14 in. 15 in.
(356 mm) (381 mm)
150#
NGE (2) ¾ 14"-150#
-10
UNC FLANGE
2B (2) ¾ -10
Holes UNC 2B
5 in. Flange Holes
Inlet & Outlet
11½ in.
91⁄16 in. Ref. (292 mm)
163⁄16 in. Ref. (230.2 mm)
(411.2 mm) 9¼ in. Ref.
165⁄16 in. Ref. (235 mm)
(414.3 mm)
½ in.
NPT Drain 9 ½ in.
NPT Drain
A Ref.
C A Ref.
10
B C
B
½ in.
(13 mm) 3½ in. ½ in.
(89 mm) (13 mm)
147⁄8 in.
(377.8 mm)
7⁄8 in. (22.2 mm) X 161⁄8 in.
2 in. (51 mm) Slot
4 4
12½ in.
(318 mm) 12½ in.
(318 mm)
15 in.
14"-150#
WATLOW(381
® mm)
375
FLANGE (2) ¾ -10
Circulation Heaters
WATROD and FIREBAR

Circulation Heaters
Part Number
Optional Optional Sheath

Stock Plug or ANSI Flange Terminal Process Limit
Part Number Enclosures Sensors Sensors
Stock Plug or ANSI Flange Part Number Sheath Limit Sensors

Note: Catalog part numbers include optional enclosures and HJ = Type J high-limit thermocouple, horizontal mount
process sensors. To order optonal enclosures or sensors, substitute TJ = Type J high-limit thermocouple, vertical/housing at top
the appropriate suffix. BJ = Type J high-limit thermocouple, vertical/housing at bottom
HK = Type K high-limit thermocouple, horizontal mount
Optional Terminal Enclosures
TK = Type K high-limit thermocouple, vertical/housing at top
S = General purpose enclosure
BK = Type K high-limit thermocouple, vertical/housing at bottom
W = Moisture resistant enclosure
Note: Heater orientation is critical to accurate sensing of limit
E = Explosion resistant enclosure
conditions. Use the appropriate code to indicate heater mounting
C = Moisture/explosion resistant enclosure orientation.
Note: Catalog listings include either a general purpose enclosure
or moisture/explosion resistant enclosure. Substitute enclosure
options are noted.
Optional Process Sensors

2 = 30 to 250°F, (-1 to 121°C) SPST
3 = 175 to 550°F, (79 to 288°C) SPST
4 = 40 to 110°F, (-1 to 43°C) DPST
5A = 60 to 250°F, (16 to 121°C) DPST (FIREBAR)
7A = 100 to 550°F, (38 to 288°C) DPST (FIREBAR)
J = Type J process thermocouple in thermowell
K = Type K process thermocouple in thermowell
Note: Thermostat part numbers are shown in the Thermostat Chart on
page 537.
Example Part Number: CFONA18A10 S 5 HJ
376 WATLOW®
Circulation Heaters
WATROD and FIREBAR Heaters

Booster Heaters
Booster heaters are ideal for circulating applications

requiring less kilowatts, including engine preheating.
Booster heaters are made from a steel or brass
11/4 in. (32 mm) NPT screw plug heater and insulated
pressure vessel with 1 in. (25 mm) FNPT inlet and outlet.
This assembly also contains an integral thermostat.
• Watt densities up to 60 W/in2 (9.3 W/cm2)
• Wattages up to 3 kilowatts
• Voltages up to 480VAC
• Steel sheath temperatures up to 750°F (400°C)
• Alloy 800 sheath temperatures up to 350°F (175°C)
Features and Benefits

Dual voltages
• Simplifies stocking and wiring
Carbon steel, standard pipe wall vessel
• Assures compatibility with many applications
One inch thick (25 mm) fiberglass thermal insulation
General
rated to 750°F (400°C) Purpose
• Reduces heat loss Conduit Terminal
Enclosure
Opening
Steel jacket (shroud) with Integral
Thermostat
• Provides a fully welded and painted shroud to protect 1 in. (25 mm)
4 in. (100 mm)
thermal insulation O.D. Jacket FNPT Outlet Pipe
Inlet and outlet nozzle connections

Vessel
• Includes threaded FNPT connections to meet Insulation
OEM standards
General purpose terminal enclosures
• Protects terminals and thermostat
1 in. (25 mm) WATROD
Integral thermostat controls process temperatures FNPT
Inlet Pipe
Element
from: 60 to 160°F (15 to 70°C) on alloy 800 sheath
elements and 175 to 550°F (80 to 290°C) on steel
sheath elements
• Minimizes the amount of time that the heater operates
while the engine is running
Typical Applications
• Stand by generators
• Peak power trimming generators
• Mobile generator sets
• Earth moving equipment
• Water heaters
• Lightweight oils
WATLOW® 377
Circulation Heaters

Booster Heaters
Options ¾ in. NPT 45⁄8 in.
(117.5 mm)
Terminal Enclosure Conduit Opening
Removable 313⁄16 in.

General purpose terminal enclosures with integral Terminal Cover (96.8 mm)
thermostats are supplied on all Watlow booster heaters. 615⁄16 in.
Optional moisture resistant terminal enclosures protect (176.2 mm)
wiring and thermostat from liquid contaminants. To order,
Outlet
request the moisture resistant enclosure option. 1 in. (25 mm)
FNPT
For explosion resistant and explosion/moisture resistant
4 in. (102 mm)
terminal enclosures, request the explosion/moisture Outside Diameter 2015⁄16 in.
resistant option. (531.8 mm)
14 in.
Part Est. Ship. (356 mm)
Number Wt.
Description kW Phase 120/240VAC lbs (kg)
Application: Aqueous Solutions
60 W/in2 1.50 1 CBEN8G6 18 (8.2)
Inlet 1 in. (25 mm) FNPT
Brass Plug 2.00 1 CBEN10F6 18 (8.2)
2-Alloy 800 2.50 1 CBEN12F6 18 (8.2)
(9.3 W/cm2) 3.00 1 CBEN15A6X 18 (8.2)
Application: Lightweight Oils
23 W/in2 0.50 1 CBES7G6 18 (8.2)
Steel Plug 0.75 1 CBES10B6 18 (8.2)
2-Steel 1.00 1 CBES12P6 18 (8.2)
(3.6 W/cm2)
• M - Manufacturing lead times For optional housing adders,
use circulation heater adders.
378 WATLOW®
Circulation Heaters

Engine Preheaters
Watlow engine preheaters help maintain a desired

minimum engine temperature to make starting fast and
easy. They also reduce engine wear caused by cold
engine starting.
Engine preheaters mount conveniently on an engine or
rail. The internal thermostat constantly adjusts to ambient
temperature changes to keep engine coolant warm at
all times.
An internal tank temperature sensor protects Watlow
engine preheaters from dry-fire conditions caused by low
coolant levels or blocked flow.
Installation is easy with just two mounting bolts and inlet
and outlet hose connections.
• Watt densities from 45 to 90 W/in2 (7 to 14 W/cm2) Integral check valve
• Assures proper coolant flow and correct thermostat
• Wattages up to 6 kilowatts
operation. Check valve will not interfere with adequate
• UL® and CSA component recognition up to 480VAC thermo-siphoning
and 600VAC respectively
• UL® and CSA component
• Thermostatically controlled from 60 to 160°F Recognition under file numbers E52951 and 31388
(15 to 70°C) respectively
• Alloy 800 sheath temperatures up to 1600°F (870°C)
Typical Applications
Features and Benefits • Stand by generators
Alloy 800 sheath • Primary power generators
• Minimizes the risk of premature failure in the event of a
• Fire pump engines
dry-fire condition
Integral, prewired adjustable thermostat mounted in Options
a general purpose terminal enclosure Terminal Enclosure
• Provides a ready to install unit
The following terminal enclosures are available:
Easy installation with standard 1 in. (25 mm)
• Standard, general purpose
diameter beaded inlet and outlet nozzles
• Provides rubber hose connections eliminating the need • Moisture resistant
for threaded fittings and adapters • Explosion resistant Class 1, Division 1 and 2,
120/240VAC or 240/480VAC dual voltages Groups B, C and D.
• Makes field wiring flexible
• Minimizes stocking multiple voltages
Mounting bracket
• Isolates harmful engine vibration
Heavy-duty welded carbon steel tank
• Resists corrosion and extends life
Optional oil pressure interconnect switch
• Disrupts power during engine operation
WATLOW® 379
Circulation Heaters
WATROD and FIREBAR Heaters 3 3/4"

1" (25 mm) (95 mm)
Engine Preheaters
2" (51 mm)
Application Hints
• Mount engine preheaters in horizontal position only • Estimate kilowatt requirements with the following (4) 1/4-20
(as shown in Figures 1, 2 and 3). Contact your Watlow formula. First determine the engine displacement,
Bolts, 5/8" (16 mm)
then multiply: Threaded Length
representative if vertical mounting is unavoidable. Incoloy® Watrod
Check Valve
• Mount the heater near or below the lowest point on English
Thermowell
the engine block. Keep 4 5/outlet
8" nozzle pointed up, as
Drain 4 5/8" (117 m
(117 mm) Cubic inches X 3 = estimated wattage Diameter
indicated on the tank.
Metric
Liters X 183 = estimated wattage
Outlet Nozzle / in.- 20 Mounting Bolts

1 4
Sized for Vibration
1 in. (25 mm) Isolator Bushings
I.D. hose Mounting Slots
(2) Mounting Studs
WATROD Heating Element Check Valve Inlet Nozzle Sized for

Thermowell 1 in. (25 mm) I.D. hose
Drain
NEMA 1 Terminal Enclosure
(4) Mounting Slots 9/32 x 3/4 in.

Figure 1 (7.1 X 19 mm)
33/4 in.
(95 mm)
63/8 in. 31/8 in. 63/16 in. 2 in. (51 mm)
(161.9 mm) (79.4 mm) (157.2 mm)
23/16 in. (55.6 mm) 1 in. (25 mm)
Up Outlet /
21 4 in.
(57 mm)
Ref. Diameter
(4) 1/4-20
Bolts, 5/8 in.
/
45 8 in. 11/2 in. (38 mm) (15.9 mm) 45/8 in.
(117.4 mm) Threaded (117.5 mm)
Overall Length ±3/8 in. (9.5 mm) Length
Overall Part Number Est. Ship.

kW Length 120/240VAC 208VAC 240/480VAC Wt.
in. (mm) 1-Phase 1-Phase 1-Phase lbs (kg)
Application: Ethylene Glycol/Engine Coolant
1.13 207/8 (530.2) CPBPL2S12 ① 12 (6)
1.50 20 7/8 (530.2) CPBPB6S12 CPBPB2S12① 12 (6)
1.69 207/8 (530.2) CPBPM2S12① 12 (6)
1.88 207/8 (530.2) CPBPN2S12① 12 (6)
2.00 207/8 (530.2) CPBPC6S12 12 (6)
2.25 20 7/8 (530.2) CPBPD6S12 12 (6)
2.25 26 11/16 (677.9) CPBPD2S12① 15 (7)
2.50 207/8 (530.2) CPBPE6S12 12 (6)
3.00 26 11/16 (677.9) CPBPF2S12① CPBPF7S12 15 (7)
3.75 26 11/16 (677.9)
4.00 26 11/16 (677.9)
CPBPG2S12 ①
CPBPH7S12
15 (7)
15 (7)
RAPID SHIP
5.00 26 11/16 (677.9) CPBPJ7S12 ① 15 (7) up to 2 pieces
• ① - Manufacturing lead times
380 WATLOW®
Circulation Heaters

(2) 1/4 - 20 Mo
Engine Preheaters (1) Pair Isolator
Bushings &
Bolts
“L” Mountin
3 1/8" (79 mm) Mounting Studs Bracket
6 3/8" (162 mm)
(4) Mounting Slots 9/32 x 3/4 in.
Figure 2 (7.1 x 19 mm)(4) Mounting Slots /32" X /4"
9 3
33/4 in. 4 3/8"
63/8 in. 31/8 in. 63/16 in. (7 mm X 19 mm) (95.3 mm) (111 mm)
(161.9 mm) (79.4 mm) (157.2 mm) 2 in. (51 mm) 1" (25 mm)
215/16 in. (74.6 mm) 1 in. (25 mm)

2" (51 mm)
2 1/4" (57 mm)
Up Outlet Inlet 31/2 in. (75 mm) Ref. Diameter
Ref. Diameter (4) 1/4-20
Bolts, 5/8 in.
(15.9 mm)
Nozzle will accept
Threaded
45/8 in. 1" (25 mm) I.D.
Length Hose
(117.5 mm) 45/8 in.
11/2 in. (38 mm) (117.5 mm)
Overall Length ±3/8 in.Drain
(9.5 mm) (4) 1/4-20 2 15/16" (75 mm)
4 5/8" (117 mm) Bolts, 5/8" (16 mm) Diameter
1 1/2" (38 mm)
Threaded Length 4 5/8" (117 m
Diameter
kW Length 277VAC Overall Length ±3/8" (10 mm)
480VAC Wt.
in. (mm) 1-Phase 3-Phase lbs (kg)
1.50 20 7/8 (530.2) CPCPB4S12① CPCPB13S12① 12 (6)
2.00 20 7/8 (530.2) CPCPC4S12① CPCPC13S12① 12 (6)
2.50 207/8 (530.2)
3.75 20 7/8 (530.2)
CPCPE4S12① CPCPE13S12① 12 (6)
CPCPG4S12① CPCPG13S12① 12 (6) RAPID SHIP
4.00 20 7/8 (530.2) CPCPH4S12① CPCPH13S12 12 (6) up to 2 pieces
5.00 207/8 (530.2) CPCPJ4S12① CPCPJ13S12 12 (6) • ① - Manufacturing lead times
Figure 3 (4) Mounting Slots 9/32 x 3/4 in.

63/8 in. 31/8 in. (7.1 x 19 mm) 43/8 in.
(161.9 mm) (79.4 mm) 11/2 in.
2 in. (51 mm) (111.1 mm) (38 mm)
21/4 in. 1 in. (25 mm)

Up Outlet Inlet (57.2 mm)
Ref. Diameter
4 5/8 in. 11/2 in. (38 mm) (4) 1/4-20 Bolts,

(117.5 mm) / in. (15.9 mm)
5 8
Overall Length ±3/8 in. (9.5 mm) 45/8 in.
Threaded Length (117.5 mm)

kW Length 120/240VAC 208VAC Wt.
in. (mm) 1-Phase 1-Phase lbs (kg)
0.75 15 5/8 (396.9) CPBPK2S12 9 (4)
1.00 155/8 (396.9) CPBPA6S12 9 (4)
WATLOW® 381
382 WATLOW®

Circulation

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Circulation Heaters

Max. Operating Typical Max.

The STARFLOW™ circulation heater is engineered to

• Maximum voltage up to 240V

Features and Benefits

9.25 in. (235 mm)

Heater Adapter Exit

③ ④ Type of Inlet ⑫ Surface Finish of Assembly and Heater

⑤ ⑥ Type of Outlet ⑬ Process Thermocouple Calibration (Assembly)

⑦⑧⑨⑩ Heater Wattage ⑭ O-Ring Material

⑪ Internal Thermocouple Calibration (Heater)

WATROD™ and FIREBAR®

Circulation heaters provide a ready-made means to

Watlow® meets virtually all your circulation heater

ANSI B16.5 Class 150 on 4 or 6 inch FIREBAR

WATROD and FIREBAR

Features and Benefits (Continued) Flange mounting holes

Options Certified Enclosures

WATROD and FIREBAR

Baffles Sheath Materials

Ref. Ref. Dimension

WATROD and FIREBAR

Pressure Vessels Inlet and Outlet Nozzle Connections

Passivated Finish Protective Steel Jacket (Shroud)

WATROD and FIREBAR

Maximum Velocities Application Hints

WATROD and FIREBAR

Performance Capabilities Options

High-Temperature Thermal Insulation

WATROD and FIREBAR ®

Application: Clean Water 5

• WATROD or FIREBAR elements

480 10.5 3 1 CBDNF29R5S M 43 (20) 425/8 (1082.7) 32 (813) 43/8 (111.1)

5 When steel vessel materials are used in this

67⁄16 in. Ref.

WATROD and FIREBAR C Ref. ®

• WATROD or FIREBAR elements

3 inch - 150 lb ANSI Flange (WATROD)

RAPID SHIP 3 Wired for 3-phase operation only B C in.

WATROD and FIREBAR ®

Application: Clean Water 5

• WATROD or FIREBAR elements

3⁄8-16 UNC 75⁄8 in.

65⁄8 in. Ref.

1211⁄16 in. Ref. 147⁄16 in. Ref.

125⁄8 in. Ref.

Circulation Heaters A Ref.

WATROD and FIREBAR ® 1¼ in.

3⁄8-16 UNC 75⁄8 in.

8 inch - 150 lb ANSI Flange (WATROD) 8"-150#

WATROD and FIREBAR C Ref. ®

• RS - Next day shipment ½ in.

125⁄8 in. Ref.

Circulation Heaters A Ref.

WATROD and FIREBAR ® 1¼ in.

6 inch - 150 lb ANSI Flange (WATROD)

WATROD and FIREBAR ®

Application: Process Water 5

• WATROD or FIREBAR elements