BLADDER TANK

PROPORTIONING SYSTEM

TECHNICAL DATA :
TANK MOUNTING TYPE Vertical or Horizontal

CONCENTRATE For Vertical Tank :

STORAGE 150 litres to 5000 litres.
CAPACITY (40 TO 1320 Gallons(US))
For Horizontal Tank :
150 litres to 10000 litres.
(40 to 2640 Gallons (US))

RATED PRESSURE 12 Bar (175 PSI)

FACTORY TEST 18 Bar (261 PSI)

PRESSURE

VESSEL Carbon steel as per ASME

CONSTRUCTION Code Section VIII for unfired
pressure vessels.

BLADDER Thermo Plastic,Mullen burst

presure +800 PSI.
Thickness 1.44 + 0.127 mm

CENTRE TUBE PVC

APPLICATION
EXTERNAL PIPING Water side : Carbon steel The Bladder Tank Foam Proportioning System utilises
seamless pipe sch 40. the water pressure to inject foam concentrate into a
Foam concentrate side : water supply and automatically proportions foam
SS sch 40 concentrate over wide range of flow and pressure, with
very low pressure drop. This system does not require
VENT AND DRAIN Ball valve (Bronze / SS ) concentrate supply pump.

OPTIONAL Sight gauge with shut off

SPECIFICATION
The Bladder Tank Foam Proportioning System are
and drain valve, ladder and
available with vertical and horizontal bladder tanks.
concentrate supply control
The carbon steel tanks are designed and constructed
valve.
in accordance with ASME Code Section VIII for unfired
pressure vessels. The maximum working pressure is
FINISH Epoxy red painted.
12 Bar (175 psi) and factory tested for 18 Bar (261
psi). The vertical tank assembly is supported by a
ORDERING Please specify
continuous skirt with provision for anchoring. The
INFORMATION 1) Tank type, vertical or
horizontal tanks are supported by two saddles welded
horizontal
to the tank and drilled for anchoring. Tank is provided
2) Storage capacity of foam
with lifting lugs.
concentrate
3) Model number, size of The system is supplied with pressure vessel, bladder,
ratio controller with flow fill and drain valve for water and foam concentrate,
and pressure. ratio controller and vent valve. The ladder and sight
4) Type of foam concentrate glass assembly is supplied as optional item on request.
to be used and percent-
age of induction PRINCIPAL OF OPERATION
required. The foam concentrate is to be filled into the bladder
very carefully to avoid rupture of the bladder. The
instructions for filling are provided with the equipment.
Once the main water flow is established and water
inlet and foam outlet valves are opened, the water

JANUARY, 2006 PAGE 1 OF 4 HD191

enters the area between vessel wall and bladder, maintenance of the system.
applying pressure to the bladder. The foam concentrate
is forced out of the bladder through the foam outlet 3. Sight glass is not pressure tight, so before taking
pipe and into the ratio controller through metering concentrate level reading, tank pressure must be
orifice. The concentrate pressure and water inlet released.
pressure at ratio controller will be same, as the main
water supply pressure is utilised to expel the foam 4. The bladder tank is to be installed under a shade to
from the bladder. The water flowing through the ratio avoid direct sunlight on the equipment.
controller jet creates a low pressure area common
both to down stream water and foam concentrate. NOTE
This injects the concentrate in to the ratio controller 1. The foam concentrate is to be filled in the
through an accurate sized orifice proportioned to bladder very carefully to avoid rupture of
water venturi. This ensures correct proportioning over the bladder. The filling guideline provided with
a wide range of flow condition. the equipment must be adhered to strictly.

The bladder tank proportioning system operates on 2. Air supply with regulator (0 to 1.0 kg/sqcm) required
same principle as that of a balance pressure during filling procedure, to be provided by user/
proportioning system. In bladder system, the bladder installer
is used as diaphragm to separate the water and foam
concentrate within the tank. The foam concentrate is 3.Water supply at 0-1 .5 kg/sqcm required for tank
injected into the ratio controller utilising water filling during commissioning , to be provided by
pressure. installer/user.
The system is also supplied with foam concentrate
control valve as an optional item. The valve allows
concentrate flow only when minimum of 3.0 kg/sq.cm.
water pressure is established in the system. For
pressure drop and flow characteristics refer catalogue
of ratio controller.

INSTALLATION, INSPECTION
AND MAINTENANCE
An installation, inspection and maintenance manual is
provided with each unit. The manual provides detail
schematic, initial procedure, inspection and
maintenance procedures. The instruction manual must
be read carefully and followed during installation and
commissioning of the system.

After few initial successful tests an authorised person

must be trained to perform inspection and testing of
the system. It is recommended to carry out physical
inspection of the system regularly, the inspection
should verify that no damages have taken place to any
component and all the valves are in their proper
position as per the system requirement. The system
should be fully tested at least once in a year and in
accordance with applicable NFPA/TAC code or in
accordance to the guidelines of the organisation having
local jurisdiction.

Do not turn off the system or any valve to repair or

test the system, without placing a roving Fire Patrol
in the area covered by the system. The patrol should
continue until the system is put back in service. Also
inform the local security personnel and the control
room so that a false alarm is not signalled.

CAUTION
1. Do not weld on the tank as it may damage the
bladder.

2. Release pressure before an inspection and

JANUARY, 2006 PAGE 2 OF 4 HD191

 VERTICAL BLADDER TANK PROPORTIONING SYSTEM

(OPTIONAL)

MATERIAL OF CONSTRUCTION
SR.NO. DESCRIPTION SPECIFICATION
1 VALVE SS/BRONZE
2 FOAM CONCENTRATE SS/BRONZE
SHUT OFF VALVE
3 WATER SHUT OFF VALVE SS/BRONZE
4 LEVEL INDICATOR GLASS/ACRYLIC
5 PRESSURE GAUGE 0-16 KG/SQCM
6 CHECK VALVE SS/BRONZE
7 SPOOL PIECE CARBON STEEL
8 RATIO CONTROLLER BRONZE
9 BLADDER THERMOPLASTIC RUBBER
10 TANK CARBON STEEL
11 NAME PLATE BRASS
12 WATER LINE PIPING CARBON STEEL
13 FOAM CONCENTRATE SS
PIPING

JANUARY, 2006 PAGE 3 OF 4 HD191

 HORIZONTAL BLADDER TANK PROPORTIONING SYSTEM

(OPTIONAL)

MATERIAL OF CONSTRUCTION
SR.NO. DESCRIPTION SPECIFICATION
1 VALVE SS / BRONZE
2 FOAM CONCENTRATE SS / BRONZE
SHUT OFF VALVE
3 WATER SHUT OFF VALVE SS / BRONZE
4 LEVEL INDICATOR GLASS/ ACRYLIC
5 PRESSURE GAUGE 0-16 KG/ SQCM
6 CHECK VALVE SS/ BRONZE
7 SPOOL PIECE CARBON STEEL
8 RATIO CONTROLLER BRONZE
9 BLADDER THERMOPLASTIC RUBBER
10 TANK CARBON STEEL
11 NAME PLATE BRASS
12 WATER LINE PIPING CARBON STEEL
13 FOAM CONCENTRATE SS
PIPING

JANUARY, 2006 PAGE 4 OF 4 HD191

 ATMOSPHERIC
FOAM CONCENTRATE STORAGE TANK

TECHNICAL DATA :

STORAGE CAPACITY 200 to 12000 Ltrs.

MATERIAL OF Stainless steel or Carbon Steel

CONSTRUCTION with internal lining

EXPANSION DOME 2% of total tank capacity

FINISH Fire red Epoxy painted

ORDERING Please specify

INFORMATION 1) Tank capacity
2) Material of construction
of tank (Type of Lining if
steel tank)
3) Site glass requrement
4) Ladder requirement
5) Finish

APPLICATION
Atmospheric storage tanks are used with Inline Foam
Inductor. Balance pressure foam proportioner and
Inline Balance Pressure Foam Proportioning system.

SPECIFICATION
The atmospheric foam concentrate storage tank is
made of stainless steel or steel material. The steel
tanks can be provided with Thrmoplastic lining on inner
surfaces.

For selecting the material of construction of the tank

or internal lining, foam concentrate manufacturer
must be consulted. All the tanks must be kept filled
upto the level of half way of expansion dome.

The tank is provided with an expansion dome with a

volume not less than 2% of the total capacity of the
tank. The concentrate storage tank less than 380
Litres. (100 gal.) does not require an expansion dome.
A sediment sump is provided at the bottom of the
concentrate tank. The tank is provided with an inlet,
an outlet, a drain connection and a fill connection. The
suction and outlet connection is provided in the
segment sump above the normal layer of sediment
which may accumulate in the sump. The inlet or return
and fill line is provided within 25mm of the tank bottom.
This reduces the possibility of foaming when the liquid
level is low. A pressure vacuum vent is provided on
the top of the expansion dome. Ladder is provided for
the tanks having 1500 litres capacity or more as
optional.

JANUARY, 2006 PAGE 1 OF 2 HD192

 TANK WITH FLAT ENDS TANK WITH DISH ENDS

FILL CONNECTION
FILL CONNECTION
VENT VALVE VENT VALVE

EXPANSION DOME EXPANSION DOME

øB
øB

SUPPLY RETURN
SUPPLY RETURN CONNECTION CONNECTION
CONNECTION CONNECTION

450
D D
450

D D
C
C A DRAIN E
A DRAIN E

DIMENSION in millimetre (Approximate) DIMENSION in millimetre (Approximate)

CAPACITY A B C D E CAPACITY A B C D E
LITRES LITRES
500 1250 770 900 225 700 4000 2500 1524 1400 350 1375
600 1500 770 1150 300 700 4500 2800 1524 1700 425 1375
700 1750 770 1400 350 700 5000 3100 1524 2000 500 1375
800 1350 925 1000 250 850 5500 3375 1524 2200 550 1375
900 1500 925 1150 300 850 6000 3650 1524 2600 650 1375
1000 1700 925 1350 350 850 6500 3950 1524 2800 700 1375
1200 2000 925 1650 400 850 7000 3050 1828 1800 450 1500
1400 2350 925 2000 500 850 7500 3250 1828 2000 500 1500
1500 1850 1075 1500 375 1000 8000 3450 1828 2200 550 1500
1600 1950 1075 1600 400 1000 8500 3650 1828 2400 600 1500
1700 2150 1075 1800 450 1000 9000 3850 1828 2600 650 1500
1800 2200 1075 1850 450 1000 10000 3350 2100 2000 500 1850
1900 2300 1075 1850 450 1000 10500 3450 2100 2200 550 1850
2000 2450 1075 2100 525 1000 11000 3650 2100 2400 600 1850
2100 1900 1250 1550 400 1150 11500 3750 2100 2400 600 1850
2200 2000 1250 1650 400 1150 12000 3900 2100 2600 650 1850
2300 2100 1250 1750 450 1150
2400 2150 1250 1800 450 1150
2500 2250 1250 1900 475 1150
3000 2150 1400 1800 450 1250
3500 2450 1400 2100 525 1250

JANUARY, 2006 PAGE 2 OF 2 HD192

 SKID MOUNTED BALANCE PRESSURE
FOAM PROPORTIONING SYSTEM

APPLICATION
Balance Pressure pump skid-proportioning system
accurately controls the flow of foam concentrate in
to the water stream. The system automatically
controls the foam concentrate over a wide range of
flow and pressure, without manual adjustment.

The system is typically used in the fixed foam system

and specialised mobile equipments to protect tank
farm, offshore platform, air craft hanger, marine dock,
loading rack and in many other applications and in all
types of hazard.

SPECIFICATION
The system utilizes the principle of operation based
on the use of a modified venturi device called "Ratio
Controller". As the water flows through a nozzle at
the inlet of ratio controller, a low-pressure area is
created between the inlet nozzle and a down stream
section called diffuser. This low-pressure area causes
foam concentrate to flow through a metering orifice
at the concentrate inlet and into the low-pressure
area. As the system demand varies, the flow through
the ratio controller increase or decreases, which in
system at least once in a week. The inspector should
turn varies the pressure at low pressure area of ratio
verify that all the valves are in their proper position
controller, creating a corresponding pressure drop
as per the system requirement and there is no damage
across the foam concentrate metering orifice. This
to any component.
corresponding change of pressure results in a foam
concentrate flow, which is proportional to the water Do not turn off the system or any valve to repair or
flow through the ratio controller. test the system, without placing a roving Fire Patrol
in the area covered by the system. The patrol should
The pressure sensing line from the ratio controller
continue until the system is back in service. Also inform
inlet for water pressure, and from the concentrate
the local security guards and control alarm station,
supply side above the metering orifice are connected
so that a false alarm will not be signalled. The system
to a bypass valve. This valve automatically adjusts the
must be periodically checked for its normal operating
concentrate pressure corresponding to the water
condition. All the valves must be verified for its normal
pressure by re-circulating the concentrate in return
operating condition. The electrical controls must also
line to the concentrate storage tank. Manually the
be verified.
pressure can also be balanced by using manual
regulating globe valve to read equal pressure of the The system must be operated periodically to verify its
water gauge and the foam concentrate gauge (or normal operating condition as per the instruction for
through a duplex gauge). testing provided with the equipment.
The system is available as a skid mounted unit, in The entire system must be fully tested at least once
different flow range, varying from 150 to 18000 LPM. in a year in accordance with the applicable NFPA codes,
Each skid consist of a positive displacement pump, a or in accordance to the guidelines of the organisation
pump drive, an electric control, a bypass valve, a having local jurisdiction.
manual regulating valve, a ratio controller,
interconnecting piping in stainless steel with various
controlling valves, check valve, flush-in and flush-out
valve. The system is also available for operation in auto
mode.

INSPECTION AND MAINTENANCE

A qualified and trained person must commission the
system. After few initial successful tests, an
authorised person must be trained to perform the
inspection and testing of the system. It is
recommended to carry out physical inspection of the

JANUARY, 2006 PAGE 1 OF 2 HD 190

 T YPICAL INSTALLATION OF BALANCE PRESSURE FOAM PROPORTIONING SYSTEM

JANUARY, 2006 PAGE 2 OF 2 HD 190

 INLINE BALANCE PRESSURE
FOAM PROPORTIONER

TECHNICAL DATA :
MODEL IB for Bronze construction
IS 318 / ASTM B62
IBS for stainless steel
( 304 ) construction
( ASTM A351-CF8 )

SIZE 80, 100, 150 & 200 NB

MAXIMUM SERVICE 14 BAR ( 200 PSI )

PRESSURE

MIMIMUM WORKING 3.0 BAR. ( 44 PSI )

PRESSURE

FLOW RANGE Size Flow

80NB : 270 - 3000LPM
100NB : 650 - 5700LPM
150NB : 1200 - 9500LPM
200NB : 3200 - 18500LPM

FLANGE CONNECTION ANSI B16.24 Class 150#

for bronze ANSI B16.5 Class
150# for stainless steel
The Inline Balance Pressure Foam Proportioning
System is used for simultaneous operation of the
THREADED OPENING BSPT/NPT optional
multiple foam injection even with different pressures
between the two injection point with a single
concentrate supply line. Various sizes of inline balance
PRESSURE SENSING TEFLON tube with
pressure proportioner can be combined to suit the
HOSE stainless steel braided cover
flow requirement of each hazard area.
TRIM CONNECTION Brass/stainless steel
SPECIFICATION
AND VARIOUS
Inline balance pressure proportioning system utilizes
CONTROL VALVES
a single, positive displacement foam concentrate
supply pump, an atmospheric foam concentrate
FACTORY HYDROSTATIC 25 Bar. ( 365 PSI)
storage tank, inline balance proportioner, and a foam
TEST PRESSURE
concentrate regulating valve. The pressure regulating
valve is mounted on foam concentrate return line to
FINISH Epoxy Red Painted
the foam concentrate storage tank. The valve regulates
the foam concentrate supply pressure. The Inline
ORDERING Please specify :
balance pressure proportioner consists of a ratio
INFORMATION a) Model Number
controller, diaphragm operated pressure balancing
b) Flow rate
valve, water and foam gauges, and pressure sensing
c) Percentage of foam
hose of teflon tube with stainless steel braided cover,
Concentrate used
interconnecting trim fittings with various control and
d) Type of Foam flush valves. The water inlet pressure and foam
Concentrate used concentrate pressure at metering orifice is sensed
e) Flange Connection by a diaphragm valve and it automatically balances the
specification concentrate supply to provide accurately proportioned
water foam solution over a wide range of flow
conditions. A foam concentrate supply valve is also
APPLICATION provided as an optional item. The system requires foam
The inline balance pressure foam proportioners are concentrate supply pressure of 1.5- 2.0 bar. higher
used with positive displacement foam concentrate than the water supply pressure. The Inline balance
supply pump . The system controls accurately the flow pressure proportioner is also provided with a manual
of foam concentrate into the water stream over a balancing valve.
wide range of flow rate and pressure.

JANUARY, 2006 PAGE 1 OF 4 HD 189

INSPECTION AND MAINTENANCE
A qualified and trained person must commission the taken place to any component. The system where foam
system. After a few initial successful tests, an concentrate piping is maintained in charged condition,
authorized person must be trained to perform the the provision should be made to flow foam through
inspection and testing of the system. It is each Inline Balance Proportioner at least once in six
recommended to carry out physical inspection of the weeks. The system should be fully tested at least once
system at least once in a week. The inspection should in a year or in accordance with applicable NFPA codes,
verify that all the valves are in their proper position or in accordance to the guidelines of the organization
as per the system requirement and no damage has having local jurisdiction.

INLINE BALANCE PRESSURE PROPORTIONER WITH MANUAL OVERRIDE

WATER GAUGE
FOAM SENSING LINE
DIAPHRAGM BALANCE VALVE
FOAM GAUGE
MANUAL OVERRIDE VALVE

FOAM CONSENTRATE
SUPPLY VALVE

FOAM
CONSENTRATE
INLET

D
CONNECTION
FLUSH OUT VALVE

DIMENSIONS DRAIN PLUG

C

WATER SENSING LINE

SIZE A B C D
80 NB 191 630 267 490 WATER INLET FOAM SOLUTION
OUTLET

100 NB 264 608 278 514

150 NB 330 700 352 605 RATIO CONTROLLER

B A
200 NB 340 718 362 625

Dimensions in millimetre (Approximate)

INLINE BALANCE PRESSURE PROPORTIONER WITHOUT MANUAL OVERRIDE

WATER GAUGE

FOAM GAUGE

DIAPHRAGM BALANCE VALVE

FOAM SENSING LINE

FOAM CONSENTRATE
SUPPLY VALVE

FOAM
CONSENTRATE
INLET
D

CONNECTION
FLUSH OUT VALVE
DIMENSIONS
DRAIN PLUG
C

SIZE A B C D
WATER SENSING LINE
80 NB 191 545 285 427
100 NB 264 540 305 445 WATER INLET FOAM SOLUTION
OUTLET
150 NB 330 590 360 540
RATIO CONTROLLER
200 NB 340 586 396 581

Dimensions in millimetre (Approximate) B A

JANUARY, 2006 PAGE 2 OF 4 HD 189

 FLOW VS PRESSURE LOSS

1.0
0.8

0.6
FRICTION LOSS, KG. / SQ. CM.

0.4

0.2

NB NB NB
NB 0
15
0
20
0
80 10
0.1

0.05

0.5 1 2 4 6 8 12 16 20

SOLUTION FLOW, LPM ( AXIS READING X 1000)

PRESSURE VS FLOW GRAPH

13 13

12 12
INLET PRESSURE, KG./SQ.CM.

INLET PRESSURE, KG./SQ.CM.

11 11
10 10
9
9
8
8
7
6 7

5 6
4 5
3 4
3
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
SOLUTION FLOW, LPM ( AXIS READING X 1000 ) 2
0 10 20 30 40 50 60 70 80 90 100
SIZE 200NB SOLUTION FLOW, LPM ( AXIS READING X 100 )

SIZE 150NB

13
12
INLET PRESSURE, KG./SQ.CM.

11
10
9
8
7
6
5
4
3
2
0 10 20 30
SOLUTION FLOW, LPM ( AXIS READING X 100 )

SIZE 80NB

JANUARY, 2006 PAGE 3 OF 4 HD 189

 TYPICAL INLINE BALANCE PRESSURE FOAM PROPORTIONING SYSTEM

CAUTION
Do not turn off the system or any valve to repair or test the system, without placing a roving Fire Patrol in
the area covered by the system. The Patrol should continue until the system is put back in service. Also
inform the local security guards and the control alarm station, so as to avoid false alarm..

JANUARY, 2006 PAGE 4 OF 4 HD 189

 RATIO CONTROLLER

TECHNICAL DATA :
MODEL RC-B Bronze material
RC-S Stainless steel
material

SIZE 80,100,150 and 200 NB

MAX. SERVICE 14 Bar ( 200 PSI )

PRESSURE

FLOW SIZE FLOW

80NB 270 to 3000LPM
100NB 650 to 5700LPM
150NB 1200 to 9500LPM
200NB 3200 to 18500LPM

FACTORY HYDROSTATIC 25 Bar.( 365 PSI)

TEST PRESSURE

MINIMUM WORKING 3.0Kg/sq.cm. (45 PSI)

PRESSURE

FLANGE CONNECTION ANSI B16.5 - 150# for SS

ANSI B16.24 - 150# for
Bronze APPLICATION
The Ratio Controller is used for proportioning the foam
FOAM CONCENTRATE 3% or 6% concentrate into the water supply with a wide range
PROPORTIONING of flow and pressure. The Ratio Controller is also used
ORIFICE with the Bladder proportioning system, inline balance
proportioning system and Skid mounted pump balance
FINISH Epoxy Red Painted proportioning system.

SPECIFICATION
ORDERING Please specify :
The Ratio Controller works on venturi principle. As the
INFORMATION a) Model
water flow passes through a nozzle at the inlet of a
b) Minimum and Maximum
ratio controller, a low-pressure area is created
Pressure and flow rate
between inlet nozzle and the down stream section called
c) Induction Percentage
diffuser. This low-pressure area causes the foam
d) Type of Foam Concen-
concentrate to flow through a metering orifice at the
trate used concentrate inlet and into the low-pressure area. As
e) Flange Connection the system demand varies, the water jet through the
Ratio Controller increase or decreases, which in turn
varies the pressure at the low-pressure area of the
Ratio Controller. This affect the corresponding
pressure across the foam concentrate-metering
orifice. The system requires same pressure of water
and concentrate to balance the proportioning system.
The diaphragm valve maintains equal pressure of the
water and the foam concentrate.

JANUARY, 2006 PAGE 1 OF 3 HD188

 A
B
C
3

F1

F1
4 1 2 4

MATERIAL OF CONSTRUCTION DIMENSION in millimetre ( Approximate )

SR.NO. DESCRIPTION MATERIAL MODEL RC-B SIZE A B C
1 NOZZLE BRONZE IS:318 / ASTM B62 80 NB 192 83 1½"BSP
2 HOUSING BRONZE IS:318 / ASTM B62 100 NB 266 90 1½"BSP
3 CONNECTOR BRONZE IS:318 / ASTM B62 150 NB 332 105 2" BSP
4 FLANGE BRONZE IS:318 / ASTM B62 200 NB 342 111 2" BSP

SR.NO. DESCRIPTION MATERIAL MODEL RC-S Dimension of Inlet / Outlet Flanges ( F1) is as per
1 NOZZLE ASTM A351 - CF8 ( 304 ) ANSI B16.5 for SS and ANSI B 16.24 for bronze.
2 HOUSING ASTM A351 - CF8 ( 304)
3 CONNECTOR ASTM A351 - CF8 ( 304 )
4 FLANGE ASTM A351 - CF8 ( 304 )

FLOW VS PRESSURE LOSS

1.0
0.8

0.6
FRICTION LOSS, KG. / SQ. CM.

0.4

0.2

NB NB NB
NB 0
15
0
20
0
80 10
0.1

0.05

0.5 1 2 4 6 8 12 16 20

SOLUTION FLOW, LPM ( AXIS READING X 1000)

JANUARY, 2006 PAGE 2 OF 3 HD188

 PRESSURE VS FLOW CHARACTERISTICS
13
13
12 12
INLET PRESSURE, KG./SQ.CM.

11 11

INLET PRESSURE, KG./SQ.CM.

10 10
9
9
8
8
7
7
6
5 6

4 5
3
4
2
0 10 20 30 3

SOLUTION FLOW, LPM ( AXIS READING X 100 ) 2

0 10 20 30 40 50 60
SIZE 80NB
SOLUTION FLOW, LPM ( AXIS READING X 100 )
13
SIZE 100NB
12
13
INLET PRESSURE, KG./SQ.CM.

11
12
INLET PRESSURE, KG./SQ.CM.

10
11
9 10
8 9
7 8
7
6
6
5
5
4
4
3 3
2
0 10 20 30 40 50 60 70 80 90 100 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
SOLUTION FLOW, LPM ( AXIS READING X 100 ) SOLUTION FLOW, LPM ( AXIS READING X 1000 )

SIZE 150NB SIZE 200NB

JANUARY, 2006 PAGE 3 OF 3 HD188

 INLINE FOAM INDUCTOR

TECHNICAL DATA :

MODEL IG - Bronze material

IA - Aluminium alloy with
steel flanged end.
IS - Stainless Steel
material

MAXIMUM SERVICE 12 BAR. (175 PSI)

PRESSURE

FACTORY HYDROSTATIC 25 BAR. (365 PSI)

TEST PRESSURE

MINIMUM WORKING 6.4 BAR. (93 PSI)

PRESSURE

MAXIMUM BACK 65% of Inlet Pressure

PRESSURE

NOMINAL SIZE 50, 65, 80, 100 &150 MM

FINISH Yellow Paint

SYSTEM DESIGN DETAILS
ORDERING a) Inductor Inlet Pressure. The Inductor must be selected and installed in a
INFORMATION b) Foam solution flow hydraulically calculated system considering the
required. limitation of permissible back pressure. The maximum
c) Percentage of induction. back pressure allowed is expressed as 65% of pressure
d) Type of foam concentrate at the inlet of the inductor.
to be used.
e) Maximum suction lift. In the fixed foam system installation the inductor can
f ) Flange connection. be mounted above the concentrate storage tank.
The maximum height of the Inductor suction pipe above
the bottom of the storage tank to the inductor centre
APPLICATION should not exceed 1.75 meters. A minimum of 600
mm of unobstructed straight pipe line should be
Inline Foam Inductor is used to induct the foam liquid provided at the inlet and outlet of the inductor. The
concentrate in water stream to supply proportioned inductor must be installed in a system having minimum
solution of the liquid concentrate and water, to the of 6.4 bar inlet pressure at inlet of inductor.
foam producing equipment. The inductors are designed
primarily for use in the fixed foam Installation to provide The diameter of water supply pipe and water foam
a simple and reliable method of proportioning in solution pipe should not be less than that of the
constant flow applications. Each Inductor is designed diameter of the inductor. A shut-off valve provided in
for a predetermined water pressure to give the the induction line must be full bore on-off valve.
correct proportioning at that pressure and the
The non-return valve if fitted in the foam induction pipe
discharge rate. The increase or decrease of the inlet
line, then it must be supplied or recommended by HD,
pressure will result in an increase or decrease in the
so that the induction rate is properly calibrated in
flow rate, which in turn will change the proportioning. factory before supply. For the best performance the
inlet pressure at the inline inductor should be 6.8 bar
SPECIFICATION or higher.
'Inductors are available in three different materials of
construction, a wide range of flow from 75 to 3500
litres per minute at the inlet pressure between 6.4 to
12 bar as shown in the graph.
Each Inductor is accurately calibrated at the factory
to match the flow, pressure and the induction
requirement of the system. This enables to ensure
and achieve the correct performance.

JANUARY, 2006 PAGE 1 OF 5 HD 187

INSTALLATION AND MAINTENANCE 3) A pressuge gauge mounting socket at inlet and
Inductor must be supported firmly to prevent strain outlet of Inductor must be provided, which will help
on the inductor itself. to analize the system during commissioning. The
socket can be plugged in once the system has been
Qualified and trained person must commission the commissioned successfully.
system. After few initial successful test an authorized
person must be trained to perform inspection and 4) The maximum permissible back pressure is 65%
testing of the system. It is recommended to carry of inlet pressure. The system designer should
out physical inspection of the system regularly. The consider and design the system with less than
system must be fully tested at least once in a year or 65% back pressure.
in accordance with applicable NFPA codes or in
accordance to the standard of the organization having
local jurisdiction.

Do not turn off the system or any valve to make repair

or test the system, without placing a roving Fire Patrol
in the area covered by the system. The Patrol should
continue until the system is back in service. Also inform
the local security guard and control alarm station, so
that a false alarm will not be signalled.

SELECTION OF
HD INLINE FOAM INDUCTOR SIZE
Size of inductor Inductor K-Factor Range
50 NB 28.4 TO 85.00
65 NB 76.0 TO 170.00
80 NB 151.2 TO 340.20
100 NB 302.4 TO 680.30
150 NB 604.8 TO 1030.00

For selecting Inductor size, following formula to be

used :

Q=K P

Q = Total solution flow rate in litres per minute.

K = Inductor constant

P = Inlet pressure in kg/sq.cm.

Example : To find K-Factor

Q = 200 LPM

P = 8.0 kg/sq.cm.

K = 200 ÷ 8

K = 70.71

This K=70.71 falls within the range of inductor with

50 NB size. Hence 50 NB inductor should be selected.

NOTES
1) It is recommended to select next higher size of
inductor when the K-factor is very close to the
higher range of model.

2) For the best performance the inlet pressure at

the inductor should be 6.8 bar or higher.

JANUARY, 2006 PAGE 2 OF 5 HD 187

 INLINE FOAM INDUCTOR

B
6 2 1 5 7 3 4
C
F1

F2
A

DIMENSION in millimeter ( Approximate )

INDUCTOR A B C FLANGE
SIZE SIZE
F1/ F2
50 NB 300 70 1" BSP 50 NB
65 NB 350 75 1" BSP 65 NB
80 NB 400 80 1" BSP 80 NB
100 NB 450 85 1¼" BSP 100 NB
150 NB 500 90 1¼" BSP 150 NB

MATERIAL OF CONSTRUCTION
SR. NO. DESCRIPTION MODEL
IA IG IS
1 HOUSING AL ALLOY BRONZE S.S. 304
ASTM A 351-CF8
2 NOZZLE AL ALLOY BRONZE S.S. 304
ASTM A 351-CF8
3 DIFFUSER AL ALLOY BRONZE S.S. 304
ASTM A 351-CF8
4 FLANGE STEEL BRONZE S.S. 304
ASTM A 351-CF8
5 BOLT S.S. 304 S.S. 304 S.S. 304
6 ORIFICE BRONZE BRONZE S.S. 304

7 'O' RING NEOPRENE NEOPRENE NEOPRENE

RUBBER RUBBER RUBBER

- Dimension of Inlet/outlet flanges (F1/F2) are as per ANSI B16.5 150# & ANSI B16.24 for bronze material.

JANUARY, 2006 PAGE 3 OF 5 HD 187

 PRESSURE VS FLOW-PERFORMANCE CHARACTERISTICS

350 700
300
600
FLOW IN LPM

250
200 500

FLOW IN LPM
150 400
100
300
50
0 200
6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
INLET PRESSURE ( KG./SQ.CM. ) 100

SIZE 50NB 0
6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
INLET PRESSURE ( KG./SQ.CM. )

SIZE 65NB

1400 2500

1200
2000
1000
FLOW IN LPM
FLOW IN LPM

1500
800

600 1000
400
500
200

0 0
6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
INLET PRESSURE ( KG./SQ.CM. ) INLET PRESSURE ( KG./SQ.CM. )

SIZE 80NB SIZE 100NB

4000
3500
3000
FLOW IN LPM

2500
2000
1500
1000
500
0
6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
INLET PRESSURE ( KG./SQ.CM. )

SIZE 150NB

JANUARY, 2006 PAGE 4 OF 5 HD 187

 TYPICAL MOUNTING ARRANGEMENT OF
INLINE FOAM INDUCTION SYSTEM

WITH INDUCTOR MOUNTING ON TOP OF THE TANK

NOTE :
AUTOMATION OF THIS VALVE
PERMITS THE ACTIVATION OF FILL CONNECTION VENT VALVE
THIS SYSTEM FROM ANY
REMOTE SIGNALLING SOURCE. EXPANSION DOME

FOAM CONCENTRATE
STORAGE TANK
~

WATER SUPPLY

SIGHT GAUGE

DRAIN VALVE FOAM SOLUTION TO

DISCHARGE DEVICE

WITH INDUCTOR MOUNTING BELOW THE TANK

FILL CONNECTION VENT VALVE

EXPANSION DOME

FOAM CONCENTRATE
STORAGE TANK

FOAM SOLUTION TO
DISCHARGE DEVICE

SIGHT GAUGE

DRAIN VALVE

WATER SUPPLY

INLINE INDUCTOR

GATE VALVE OR BALL VALVE

CHECK VALVE NOTE :

USE MINIMUM OF 600mm.
STRAIGHT UNOBSTRUCTED PIPE AT INLET
PIPE UNION AND OUTLET OF EACH INLINE INDUCTOR.

JANUARY, 2006 PAGE 5 OF 5 HD 187

 FOAM CONCENTRATE BYPASS VALVE

TECHNICAL DATA :
MODEL BV with Bronze material
IS-318 / ASTM B62
BV-S with stainless steel
material SS 304
(ASTM A 351-CF8)

SIZE 40 & 50NB ( 1.5 & 2 INCH)

MAXIMUM SERVICE 14 Bar (200 PSI)

PRESSURE

END CONNECTION Screwed Female BSPT

(NPT Optional)

FACTORY HYDROSTATIC 25 Bar.( 365 PSI)

TEST PRESSURE

FINISH Red Epoxy painted.

ORDERING Please specify

INFORMATION 1) Size
2) End connection
is back in service. Also inform the local security guards
and control alarm station, so as to avoid false alarm.
APPLICATION
The foam concentrate bypass valve is used in the It is recommended to carry out physical inspection of
balance pressure foam proportioning pump skid the system at least once a week. The inspection should
system. The valve bypasses the controlled excess verify that all the control valves are in proper position
quantity of foam concentrate to concentrate storage as per the system requirement and no damage has
tank. taken place to any component. The valve must be
operated periodically and proper functioning must be
SPECIFICATION verified. The test must be as per the procedure of
The valve is diaphragm operated and works on the system testing.
simple differential pressure principle. The pressure
sensing lines, one from ratio controller inlet for water The system must be flushed after each operation and
pressure and another from the concentrate supply free flow of water must be drained from the flush-out
pressure above the metering orifice are connected to connection.
bypass valve. The bypass valve automatically adjusts
The user is responsible for maintaining the valve in
the concentrate pressure corresponding to the water
proper operating condition.
pressure. The bypass is provided with flush out valves.
The pressure sensing hose is Teflon with stainless steel
braided cover and it is permanently attached with
swivel coupling. The two separate pressure gauges,
one for the water and one for the foam concentrate
are provided with valve trims. A duplex gauge is supplied
as an optional item in lieu of two pressure gauges.
Each valve is factory tested for its performance.

INSPECTION AND MAINTENANCE

A qualified and trained person must commission the
system. After few initial successful tests an authorized
person must be trained to perform inspection and
testing of the system. Do not turn off the system or
any valve to make repairs or test the system, without
placing a roving Fire Patrol in the area protected by
the system. The patrol should continue until the system

JANUARY, 2006 PAGE 1 OF 2 HD186

 FOAM CONCENTRATE BY-PASS VALVE

WATER PRESSURE
FOAM PRESSURE GAUGE
GAUGE

WATER FLUSHOUT VALVE

FOAM FLUSHOUT VALVE

RETURN LINE TO FOAM

FOAM CONCENTRATE CONCENTRATE
STORAGE TANK INLET FROM
FOAM PUMP

DRAIN PLUG

FOAM CONCENTRATE SENSING

LINE FROM RATIO CONTROLLER WATER PRESSURE
ABOVE CONCENTRATE METERING SENSING LINE FROM
ORIFICE INLET OF RATIO CONTROLLER

JANUARY, 2006 PAGE 2 OF 2 HD186