July 2015 / BULLETIN 100-40-3

Modulating 3-Way Valve

Types MTW-9 and MTW-17

(Patent Pending)
Page 2 / BULLETIN 100-40-3

Figure 1
Modulating 3-Way Valve
Types MTW-9 and MTW-17
FEATURES AND BENEFITS
nn Improved performance from modulated control
nn Reduction in number of modulation valves required per
system
Simplified system piping enables piping material cost
reduction
Reduced install time enables labor cost reduction
Single actuator reduces control and wiring complexity
nn Utilizes standard 42mm stepper motor
6,386 steps of resolution
75 bipolar stepper motor
160 mA per winding
nn Bi-sealing piston assembly

DESCRIPTION
The Modulating 3-Way (MTW) valve allows control of
B refrigerant flow through two outlet ports. Two valve pistons
are attached to a connecting rod and also to the stepper motor.
As the MTW valve modulates one port opens and the other port
closes. The movement of the valve pistons relative to the two
A ports is inversely proportional.

APPLICATION
The MTW valve is typically located in the discharge line for
dehumidification, reheat and heat reclaim applications. Sporlan
recommends piping Outlet A to the normal condenser and
Outlet B to the reclaim/reheat condenser. Outlet connections
A and B are designated on the valve body. See Figure 1.
The MTW valve is a sealed design. The valve should not be
disassembled for installation or service. Disassembly will
damage the valve.
See capacity tables beginning on page 3. For additional
refrigerant capacities and other applications, please contact
Sporlan Division technical support.

COMPATIBLE CONTROLLERS
The Sporlan Kelvin II Series valve controllers are compatible
with the the MTW valves. The temperature and pressure con-
trols allow precise stand-alone control of air temperature and
pressure. See Bulletin 100-50-5 for more information about the
Kelvin II Series valve controllers.
 BULLETIN 100-40-3 / Page 3

SPECIFICATIONS
Motor Type Permanent magnet bipolar internal (wet) motor
Compatible Refrigerant All common HCFC & HFC refrigerants, including R-410A
Compatible Oil All common mineral, polyolester and alkylbenzene oils
Supply Voltage (unless current limited) 12 volts DC 10%
Cable Hermetic (20 standard)
Phase Resistance 75 ohms 10%
Stepping Current 160 mA/winding
Holding Current Not recommended
Number of Full Steps 6,386 full steps
Step Rate 200 steps / second (PPS)
Initialization 7,500 steps closing
Overdriving Recommended one 10% overdrive closed per day maximum
MRP/MAP/MWP 700 psig (48.3 bar)
MOPD 700 psid (48.3 bar)
Max Internal Leakage 400 cc/min. at 100 psid (6.9 bar) dry air
Max External Leakage 0.10 oz./yr. at 300 psig (2.8 gram/yr. at 20 bar)
Max Fluid Temperature Range -40F to 240F (-40C to 116C)
Ambient Temperature Range -40F to 140F (-40C to 60C)
Installation Maximum Temperature 240F (116C) for 15 minutes (wet rag required for brazing)
Relative Humidity 0-100% (condensing)
Mounting Orientation Motor assembly above horizontal
Flow Direction Forward flow only
Certification UL File: SA5460; CCN: SFJQ2/SFJQ8

NOMENCLATURE
MTW -9 -9 ODF -20 -S
Stripped and Tinned
Modulating 3-Way Valve Valve Model Fitting Size and Type Cable Length
Cable Ends
Page 4 / BULLETIN 100-40-3

FLOW CAPACITY DISCHARGE (TONS)

Refrigerant
Valve Model

Evaporator
Temp (F)

R-134a R-22 R-407A R-407C

Pressure Drop Across Valve (psid)
0.5 1 3 5 10 0.5 1 3 5 10 0.5 1 3 5 10 0.5 1 3 5 10
40 4.29 6.04 10.4 13.5 19.3 5.00 7.03 12.1 15.6 22.2 5.03 7.08 12.2 15.7 22.4 5.09 7.16 12.3 15.9 22.6
20 4.12 5.80 10.0 13.0 18.5 4.83 6.79 11.7 15.1 21.4 4.84 6.82 11.7 15.2 21.5 4.90 6.90 11.9 15.3 21.8
MTW-9

0 3.94 5.55 9.58 12.4 17.7 4.64 6.54 11.3 14.5 20.6 4.64 6.53 11.2 14.5 20.6 4.70 6.62 11.4 14.7 20.9
-20 3.75 5.28 9.12 11.8 16.9 4.45 6.26 10.8 13.9 19.8 4.42 6.22 10.7 13.8 19.6 4.49 6.31 10.9 14.0 19.9
-40 3.56 5.01 8.65 11.2 16.0 4.25 5.97 10.3 13.3 18.9 4.19 5.90 10.2 13.1 18.6 4.26 6.00 10.3 13.3 18.9
40 8.15 11.4 19.3 24.8 35.0 9.45 13.2 22.3 28.6 40.2 9.50 13.2 22.4 28.7 40.4 9.63 13.4 22.7 29.1 40.9
20 7.82 10.9 18.5 23.8 33.6 9.13 12.7 21.6 27.6 38.8 9.15 12.7 21.6 27.7 38.9 9.27 12.9 21.9 28.1 39.5
MTW-17

0 7.48 10.4 17.7 22.8 32.2 8.79 12.2 20.8 26.6 37.4 8.76 12.2 20.7 26.5 37.2 8.90 12.4 21.0 26.9 37.8
-20 7.12 9.93 16.9 21.7 30.6 8.43 11.7 19.9 25.5 35.8 8.36 11.6 19.7 25.3 35.5 8.49 11.8 20.1 25.7 36.1
-40 6.75 9.41 16.0 20.5 29.0 8.05 11.2 19.0 24.3 34.2 7.93 11.0 18.7 24.0 33.7 8.07 11.2 19.1 24.4 34.3

Refrigerant
Valve Model

Evaporator
Temp (F)

R-407F R-404A R-507 R-410A

Pressure Drop Across Valve (psid)
0.5 1 3 5 10 0.5 1 3 5 10 0.5 1 3 5 10 0.5 1 3 5 10
40 5.36 7.54 13.0 16.7 23.8 4.70 6.61 11.4 14.7 20.8 4.69 6.60 11.4 14.7 20.8 6.19 8.71 15.0 19.3 27.3
20 5.17 7.27 12.5 16.2 22.9 4.50 6.34 10.9 14.1 20.0 4.49 6.32 10.9 14.0 19.9 6.01 8.45 14.5 18.7 26.5
MTW-9

0 4.96 6.98 12.0 15.5 22.0 4.29 6.04 10.4 13.4 19.1 4.28 6.03 10.4 13.4 19.0 5.80 8.15 14.0 18.1 25.6
-20 4.74 6.67 11.5 14.8 21.0 4.07 5.73 9.86 12.7 18.1 4.06 5.71 9.84 12.7 18.0 5.57 7.83 13.5 17.4 24.6
-40 4.51 6.34 10.9 14.1 20.0 3.84 5.40 9.29 12.0 17.0 3.82 5.38 9.26 11.9 17.0 5.32 7.48 12.9 16.6 23.5
40 10.1 14.1 23.9 30.6 43.0 8.84 12.3 20.9 26.7 37.5 8.8 12.3 20.8 26.6 37.4 11.7 16.2 27.5 35.1 49.2
20 9.77 13.6 23.1 29.5 41.5 8.47 11.8 20.0 25.6 36.0 8.4 11.8 19.9 25.5 35.9 11.3 15.8 26.7 34.1 47.8
MTW-17

0 9.38 13.1 22.1 28.3 39.8 8.08 11.3 19.1 24.4 34.3 8.1 11.2 19.0 24.3 34.2 10.9 15.2 25.7 32.9 46.1
-20 8.97 12.5 21.2 27.1 38.1 7.66 10.7 18.1 23.2 32.5 7.6 10.6 18.0 23.1 32.4 10.5 14.6 24.7 31.6 44.3
-40 8.53 11.9 20.1 25.8 36.2 7.22 10.1 17.0 21.8 30.6 7.2 10.0 17.0 21.7 30.5 10.0 14.0 23.6 30.2 42.3

Capacities based upon 100F condensing temperature, 60F liquid entering expansion valve, isentropic compression plus 50F, evaporator temperature as shown
plus 25F superheated suction gas. Reference the table below for liquid correction factors.

CORRECTION FACTORS - DISCHARGE APPLICATION (F)

Liquid Temperature Entering Expansion Valve (F)
REFRIGERANT 0 10 20 30 40 50 60 70 80 90 100
Correction Factor, CF Liquid Temperature
R-134a 1.27 1.22 1.18 1.14 1.09 1.05 1.0 0.95 0.91 0.86 0.81
R-22 1.22 1.18 1.15 1.11 1.07 1.04 1.0 0.96 0.92 0.88 0.84
R-407A 1.28 1.23 1.19 1.14 1.10 1.05 1.0 0.95 0.90 0.85 0.79
R-407C 1.26 1.22 1.18 1.13 1.09 1.05 1.0 0.95 0.91 0.86 0.81
R-407F 1.26 1.22 1.18 1.13 1.09 1.05 1.0 0.95 0.91 0.86 0.81
R-404A 1.34 1.29 1.23 1.17 1.12 1.06 1.0 0.94 0.88 0.81 0.74
R-507A 1.35 1.29 1.24 1.18 1.12 1.06 1.0 0.94 0.87 0.81 0.74
R-410A 1.26 1.22 1.18 1.13 1.09 1.05 1.0 0.95 0.90 0.85 0.80
 BULLETIN 100-40-3 / Page 5

FLOW CAPACITY DISCHARGE (kW)

Valve Model Refrigerant

Evaporator
Temp (C)
R-134a R-22 R-407A R-407C
Pressure Drop Across Valve (bar)
0.03 0.06 0.2 0.4 0.7 0.03 0.06 0.2 0.4 0.7 0.03 0.06 0.2 0.4 0.7 0.03 0.06 0.2 0.4 0.7
5 12.8 18.0 32.7 46.4 62.0 14.9 21.0 38.1 53.9 71.7 14.9 21.0 38.1 53.9 71.7 15.1 21.3 38.6 54.7 72.7
-5 12.3 17.3 31.6 44.8 59.9 14.5 20.4 37.0 52.4 69.6 14.5 20.3 36.9 52.2 69.4 14.6 20.6 37.4 52.9 70.4
MTW-9

-15 11.8 16.7 30.4 43.1 57.6 14.0 19.8 35.9 50.7 67.4 13.9 19.6 35.6 50.3 66.9 14.1 19.9 36.1 51.1 67.9
-25 11.4 16.0 29.1 41.3 55.2 13.6 19.1 34.6 49.0 65.1 13.4 18.8 34.2 48.4 64.3 13.6 19.1 34.7 49.1 65.3
-35 10.9 15.3 27.8 39.5 52.8 13.0 18.3 33.3 47.1 62.6 12.8 18.0 32.7 46.3 61.5 13.0 18.3 33.3 47.1 62.6
5 24.3 33.9 60.6 85.2 113 28.4 39.5 70.5 98.7 130 28.3 39.5 70.4 98.5 130 28.7 40.0 71.4 100 132
-5 23.5 32.7 58.5 82.3 109 27.6 38.4 68.5 95.9 126 27.4 38.2 68.1 95.4 126 27.9 38.8 69.2 96.9 128
MTW-17

-15 22.6 31.5 56.3 79.2 105 26.7 37.2 66.4 92.9 122 26.5 36.9 65.7 92.0 121 26.9 37.5 66.8 93.5 123
-25 21.7 30.2 54.0 75.9 101 25.8 35.9 64.1 89.7 118 25.4 35.4 63.1 88.4 116 25.9 36.0 64.2 90.0 119
-35 20.7 28.9 51.6 72.5 96.1 24.8 34.6 61.6 86.3 114 24.3 33.9 60.4 84.6 111 24.8 34.5 61.6 86.2 114

Refrigerant
Valve Model

Evaporator
Temp (C)

R-407F R-404A R-507 R-410A

Pressure Drop Across Valve (bar)
0.03 0.06 0.2 0.4 0.7 0.03 0.06 0.2 0.4 0.7 0.03 0.06 0.2 0.4 0.7 0.03 0.06 0.2 0.4 0.7
5 15.9 22.4 40.6 57.4 76.3 13.9 19.5 35.4 50.0 66.4 13.8 19.4 35.3 49.9 66.2 18.3 25.8 46.7 66.0 87.4
-5 15.4 21.7 39.4 55.7 74.0 13.4 18.8 34.1 48.2 64.0 13.3 18.8 34.0 48.1 63.8 17.9 25.2 45.6 64.4 85.3
MTW-9

-15 14.9 21.0 38.1 53.9 71.5 12.8 18.1 32.7 46.3 61.5 12.8 18.0 32.6 46.1 61.3 17.4 24.5 44.3 62.6 82.9
-25 14.4 20.2 36.7 51.9 68.9 12.3 17.3 31.3 44.2 58.7 12.2 17.2 31.2 44.1 58.5 16.8 23.7 42.9 60.6 80.2
-35 13.8 19.4 35.2 49.7 66.1 11.7 16.4 29.8 42.1 55.9 11.6 16.3 29.6 41.9 55.6 16.2 22.8 41.4 58.4 77.3
5 30.2 42.1 75.0 105 138 26.2 36.5 65.1 91.0 120 26.1 36.4 64.8 90.7 119 34.7 48.3 86.0 120 158
-5 29.3 40.8 72.8 102 134 25.3 35.2 62.7 87.8 116 25.2 35.1 62.5 87.5 115 33.9 47.2 84.0 117 154
MTW-17

-15 28.4 39.5 70.4 98.5 130 24.3 33.8 60.2 84.3 111 24.2 33.7 60.0 84.0 111 32.9 45.9 81.7 114 150
-25 27.3 38.0 67.8 94.9 125 23.2 32.3 57.6 80.6 106 23.1 32.2 57.3 80.2 106 31.9 44.4 79.1 110 145
-35 26.2 36.5 65.0 91.0 120 22.1 30.7 54.8 76.6 101 22.0 30.6 54.5 76.3 100 30.8 42.8 76.2 106 140

Capacities based upon 35C condensing temperature, 15C liquid entering expansion valve, isentropic compression plus 30C, evaporator temperature as shown
plus 15C superheated suction gas. Reference the table below for liquid correction factors.

CORRECTION FACTORS - DISCHARGE APPLICATION (C)

Liquid Temperature Entering Expansion Valve (C)
REFRIGERANT -15 -10 -5 0 5 10 15 20 25 30 35
Correction Factor, CF Liquid Temperature
R-134a 1.24 1.20 1.16 1.12 1.08 1.04 1.0 0.96 0.92 0.87 0.83
R-22 1.19 1.16 1.13 1.10 1.07 1.03 1.0 0.97 0.93 0.90 0.86
R-407A 1.25 1.21 1.17 1.13 1.09 1.04 1.0 0.96 0.91 0.87 0.82
R-407C 1.23 1.20 1.16 1.12 1.08 1.04 1.0 0.96 0.92 0.87 0.83
R-407F 1.24 1.20 1.16 1.12 1.09 1.05 1.0 0.96 0.92 0.88 0.83
R-404A 1.30 1.25 1.20 1.15 1.10 1.05 1.0 0.95 0.89 0.83 0.77
R-507A 1.31 1.26 1.21 1.16 1.11 1.05 1.0 0.94 0.89 0.83 0.77
R-410A 1.23 1.20 1.16 1.12 1.08 1.04 1.0 0.96 0.92 0.87 0.83
Page 6 / BULLETIN 100-40-3

DIMENSIONS
MTW-9 2.18 1.55
20 Cable with stripped and tinned
ends (per customer request)

3.01
4.26

6.71 B

2.50

A
2.46
1.21

3.17 3.17
4.27 4.67
8.94 1.55

MTW-17 2.18 2.30

20 Cable with stripped and tinned
ends (per customer request)

3.11

4.88

8.25

3.53

A
3.37

1.61

3.82 3.82
5.32 6.02
11.33 2.30
BULLETIN 100-40-3 / Page 7
WARNING USER RESPONSIBILITY
Failure or improper selection or improper use of the products described herein or related items can cause death, personal injury and property damage.
This document and other information from Parker Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further
investigation by users having technical expertise.
The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance,
endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry
standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or
authorized distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user,
the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the
components or systems.

FOR USE ON REFRIGERATION and/or AIR CONDITIONING SYSTEMS ONLY

For more information about our products visit us at www.sporlan.com.

2015 Parker Hannifin Corporation 72015 / Bulletin 100-40-3

Parker Hannifin Corporation

Sporlan Division
206 Lange Drive Washington, MO 63090 USA
phone 636 239 1111 fax 636 239 9130
www.sporlan.com