BLADDER TANK PROPORTIONING SYSTEM

1JANUARY, 2006 HD191PAGE OF 4

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 ASMECONSTRUCTION Code Section VIII for unfired

pressure vessels.

BLADDER Thermo Plastic,Mullen burstpresure +800 PSI.Thickness 1.44 + 0.127 mm

CENTRE TUBE PVC

EXTERNAL PIPING Water side : Carbon steelseamless pipe sch 40.Foam concentrate side :SS sch 40

VENT AND DRAIN Ball valve (Bronze / SS )

OPTIONAL Sight gauge with shut offand drain valve, ladder andconcentrate supply controlvalve.

FINISH Epoxy red painted.

ORDERING Please specifyINFORMATION 1) Tank type, vertical or

horizontal2) Storage capacity of foam

concentrate3) Model number, size of

ratio controller with flowand pressure.

4) Type of foam concentrateto be used and percent-age of induction

required.

APPLICATIONThe Bladder Tank Foam Proportioning System utilisesthe water pressure to inject foam concentrate into awater supply and automatically proportions foamconcentrate over wide range of flow and pressure, withvery low pressure drop. This system does not requireconcentrate supply pump.

SPECIFICATIONThe Bladder Tank Foam Proportioning System areavailable with vertical and horizontal bladder tanks.The carbon steel tanks are designed and constructedin accordance with ASME Code Section VIII for unfiredpressure vessels. The maximum working pressure is12 Bar (175 psi) and factory tested for 18 Bar (261psi). The vertical tank assembly is supported by acontinuous skirt with provision for anchoring. Thehorizontal tanks are supported by two saddles weldedto the tank and drilled for anchoring. Tank is providedwith lifting lugs.

The system is supplied with pressure vessel, bladder,fill and drain valve for water and foam concentrate,ratio controller and vent valve. The ladder and sightglass assembly is supplied as optional item on request.

PRINCIPAL OF OPERATIONThe foam concentrate is to be filled into the bladdervery carefully to avoid rupture of the bladder. Theinstructions for filling are provided with the equipment.Once the main water flow is established and waterinlet and foam outlet valves are opened, the water

BLADDER TANK PROPORTIONING SYSTEM


enters the area between vessel wall and bladder,applying pressure to the bladder. The foam concentrateis forced out of the bladder through the foam outletpipe and into the ratio controller through meteringorifice. The concentrate pressure and water inletpressure at ratio controller will be same, as the mainwater supply pressure is utilised to expel the foamfrom the bladder. The water flowing through the ratiocontroller jet creates a low pressure area commonboth to down stream water and foam concentrate.This injects the concentrate in to the ratio controllerthrough an accurate sized orifice proportioned towater venturi. This ensures correct proportioning overa wide range of flow condition.

The bladder tank proportioning system operates onsame principle as that of a balance pressureproportioning system. In bladder system, the bladderis used as diaphragm to separate the water and foamconcentrate within the tank. The foam concentrate isinjected into the ratio controller utilising waterpressure.

The system is also supplied with foam concentratecontrol valve as an optional item. The valve allowsconcentrate flow only when minimum of 3.0 kg/sq.cm.water pressure is established in the system. Forpressure drop and flow characteristics refer catalogueof ratio controller.

INSTALLATION, INSPECTIONAND MAINTENANCEAn installation, inspection and maintenance manual isprovided with each unit. The manual provides detailschematic, initial procedure, inspection andmaintenance procedures. The instruction manual mustbe read carefully and followed during installation andcommissioning of the system.

After few initial successful tests an authorised personmust be trained to perform inspection and testing ofthe system. It is recommended to carry out physicalinspection of the system regularly, the inspectionshould verify that no damages have taken place to anycomponent and all the valves are in their properposition as per the system requirement. The systemshould be fully tested at least once in a year and inaccordance with applicable NFPA/TAC code or inaccordance to the guidelines of the organisation havinglocal jurisdiction.

Do not turn off the system or any valve to repair ortest the system, without placing a roving Fire Patrolin the area covered by the system. The patrol shouldcontinue until the system is put back in service. Alsoinform the local security personnel and the controlroom so that a false alarm is not signalled.

CAUTION1. Do not weld on the tank as it may damage the

bladder.

2. Release pressure before an inspection and

maintenance of the system.

3. Sight glass is not pressure tight, so before takingconcentrate level reading, tank pressure must bereleased.

4. The bladder tank is to be installed under a shade toavoid direct sunlight on the equipment.

NOTE1. The foam concentrate is to be filled in the

bladder very carefully to avoid rupture ofthe bladder. The filling guideline provided withthe equipment must be adhered to strictly.

2. Air supply with regulator (0 to 1.0 kg/sqcm) requiredduring filling procedure, to be provided by user/installer

3.Water supply at 0-1.5 kg/sqcm required for tankfilling during commissioning , to be provided byinstaller/user.


MATERIAL OF CONSTRUCTIONSR.NO. DESCRIPTION SPECIFICATION

1 VALVE SS/BRONZE

2 FOAM CONCENTRATE SS/BRONZESHUT OFF VALVE

3 WATER SHUT OFF VALVE SS/BRONZE4 LEVEL INDICATOR GLASS/ACRYLIC

5 PRESSURE GAUGE 0-16 KG/SQCM6 CHECK VALVE SS/BRONZE

7 SPOOL PIECE CARBON STEEL8 RATIO CONTROLLER BRONZE9 BLADDER THERMOPLASTIC RUBBER

10 TANK CARBON STEEL11 NAME PLATE BRASS

12 WATER LINE PIPING CARBON STEEL13 FOAM CONCENTRATE SS

PIPING

VERTICAL BLADDER TANK PROPORTIONING SYSTEM

(OPTIONAL)


HORIZONTAL BLADDER TANK PROPORTIONING SYSTEM

MATERIAL OF CONSTRUCTIONSR.NO. DESCRIPTION SPECIFICATION

1 VALVE SS / BRONZE

2 FOAM CONCENTRATE SS / BRONZESHUT OFF VALVE

3 WATER SHUT OFF VALVE SS / BRONZE4 LEVEL INDICATOR GLASS/ ACRYLIC5 PRESSURE GAUGE 0-16 KG/ SQCM

6 CHECK VALVE SS/ BRONZE7 SPOOL PIECE CARBON STEEL

8 RATIO CONTROLLER BRONZE9 BLADDER THERMOPLASTIC RUBBER

10 TANK CARBON STEEL11 NAME PLATE BRASS12 WATER LINE PIPING CARBON STEEL

13 FOAM CONCENTRATE SSPIPING

(OPTIONAL)


TECHNICAL DATA :

STORAGE CAPACITY 200 to 12000 Ltrs.

MATERIAL OF Stainless steel or Carbon SteelCONSTRUCTION with internal lining

EXPANSION DOME 2% of total tank capacity

FINISH Fire red Epoxy painted

ORDERING Please specifyINFORMATION 1) Tank capacity

2) Material of constructionof tank (Type of Lining ifsteel tank)3) Site glass requrement4) Ladder requirement5) Finish

APPLICATIONAtmospheric storage tanks are used with Inline FoamInductor. Balance pressure foam proportioner andInline Balance Pressure Foam Proportioning system.

SPECIFICATIONThe atmospheric foam concentrate storage tank ismade of stainless steel or steel material. The steeltanks can be provided with Thrmoplastic lining on innersurfaces.

For selecting the material of construction of the tankor internal lining, foam concentrate manufacturermust be consulted. All the tanks must be kept filledupto the level of half way of expansion dome.

The tank is provided with an expansion dome with avolume not less than 2% of the total capacity of thetank. The concentrate storage tank less than 380Litres. (100 gal.) does not require an expansion dome.A sediment sump is provided at the bottom of theconcentrate tank. The tank is provided with an inlet,an outlet, a drain connection and a fill connection. Thesuction and outlet connection is provided in thesegment sump above the normal layer of sedimentwhich may accumulate in the sump. The inlet or returnand fill line is provided within 25mm of the tank bottom.This reduces the possibility of foaming when the liquidlevel is low. A pressure vacuum vent is provided onthe top of the expansion dome. Ladder is provided forthe tanks having 1500 litres capacity or more asoptional.

ATMOSPHERICFOAM CONCENTRATE STORAGE TANK


TANK WITH FLAT ENDS TANK WITH DISH ENDS

DIMENSION in millimetre (Approximate)

CAPACITY A B C D ELITRES

500 1250 770 900 225 700600 1500 770 1150 300 700700 1750 770 1400 350 700800 1350 925 1000 250 850900 1500 925 1150 300 850

1000 1700 925 1350 350 8501200 2000 925 1650 400 8501400 2350 925 2000 500 8501500 1850 1075 1500 375 10001600 1950 1075 1600 400 10001700 2150 1075 1800 450 10001800 2200 1075 1850 450 10001900 2300 1075 1850 450 10002000 2450 1075 2100 525 10002100 1900 1250 1550 400 11502200 2000 1250 1650 400 11502300 2100 1250 1750 450 11502400 2150 1250 1800 450 11502500 2250 1250 1900 475 11503000 2150 1400 1800 450 12503500 2450 1400 2100 525 1250

DIMENSION in millimetre (Approximate)

CAPACITY A B C D ELITRES

4000 2500 1524 1400 350 13754500 2800 1524 1700 425 13755000 3100 1524 2000 500 13755500 3375 1524 2200 550 13756000 3650 1524 2600 650 13756500 3950 1524 2800 700 13757000 3050 1828 1800 450 15007500 3250 1828 2000 500 15008000 3450 1828 2200 550 15008500 3650 1828 2400 600 15009000 3850 1828 2600 650 1500

10000 3350 2100 2000 500 185010500 3450 2100 2200 550 185011000 3650 2100 2400 600 185011500 3750 2100 2400 600 185012000 3900 2100 2600 650 1850

A

øB

C

DD

E

45

0

FILL CONNECTION

VENT VALVE

EXPANSION DOME

DRAIN

SUPPLYCONNECTION

RETURNCONNECTION

FILL CONNECTIONVENT VALVE

EXPANSION DOME

A EC

D

DRAIN

45

0øB

D

SUPPLYCONNECTION

RETURNCONNECTION

1JANUARY, 2006 HD 190PAGE OF 2

APPLICATIONBalance Pressure pump skid-proportioning systemaccurately controls the flow of foam concentrate into the water stream. The system automaticallycontrols the foam concentrate over a wide range offlow and pressure, without manual adjustment.

The system is typically used in the fixed foam systemand specialised mobile equipments to protect tankfarm, offshore platform, air craft hanger, marine dock,loading rack and in many other applications and in alltypes of hazard.

SPECIFICATIONThe system utilizes the principle of operation basedon the use of a modified venturi device called "RatioController". As the water flows through a nozzle atthe inlet of ratio controller, a low-pressure area iscreated between the inlet nozzle and a down streamsection called diffuser. This low-pressure area causesfoam concentrate to flow through a metering orificeat the concentrate inlet and into the low-pressurearea. As the system demand varies, the flow throughthe ratio controller increase or decreases, which inturn varies the pressure at low pressure area of ratiocontroller, creating a corresponding pressure dropacross the foam concentrate metering orifice. Thiscorresponding change of pressure results in a foamconcentrate flow, which is proportional to the waterflow through the ratio controller.

The pressure sensing line from the ratio controllerinlet for water pressure, and from the concentratesupply side above the metering orifice are connectedto a bypass valve. This valve automatically adjusts theconcentrate pressure corresponding to the waterpressure by re-circulating the concentrate in returnline to the concentrate storage tank. Manually thepressure can also be balanced by using manualregulating globe valve to read equal pressure of thewater gauge and the foam concentrate gauge (orthrough a duplex gauge).

The system is available as a skid mounted unit, indifferent flow range, varying from 150 to 18000 LPM.Each skid consist of a positive displacement pump, apump drive, an electric control, a bypass valve, amanual regulating valve, a ratio controller,interconnecting piping in stainless steel with variouscontrolling valves, check valve, flush-in and flush-outvalve. The system is also available for operation in automode.

INSPECTION AND MAINTENANCEA qualified and trained person must commission thesystem. After few initial successful tests, anauthorised person must be trained to perform theinspection and testing of the system. It isrecommended to carry out physical inspection of the

SKID MOUNTED BALANCE PRESSUREFOAM PROPORTIONING SYSTEM

system at least once in a week. The inspector shouldverify that all the valves are in their proper positionas per the system requirement and there is no damageto any component.

Do not turn off the system or any valve to repair ortest the system, without placing a roving Fire Patrolin the area covered by the system. The patrol shouldcontinue until the system is back in service. Also informthe local security guards and control alarm station,so that a false alarm will not be signalled. The systemmust be periodically checked for its normal operatingcondition. All the valves must be verified for its normaloperating condition. The electrical controls must alsobe verified.

The system must be operated periodically to verify itsnormal operating condition as per the instruction fortesting provided with the equipment.

The entire system must be fully tested at least oncein a year in accordance with the applicable NFPA codes,or in accordance to the guidelines of the organisationhaving local jurisdiction.


TYPICAL INSTALLATION OF BALANCE PRESSURE FOAM PROPORTIONING SYSTEM


TECHNICAL DATA :

MODEL IB for Bronze constructionIS 318 / ASTM B62IBS 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 Flow80NB : 270- 3000LPM

100NB : 650- 5700LPM150NB : 1200 - 9500LPM200NB : 3200 - 18500LPM

FLANGE CONNECTION ANSI B16.24 Class 150#for bronze ANSI B16.5 Class150# for stainless steel

THREADED OPENING BSPT/NPT optional

PRESSURE SENSING TEFLON tube withHOSE stainless steel braided cover

TRIM CONNECTION Brass/stainless steelAND VARIOUSCONTROL VALVES

FACTORY HYDROSTATIC 25 Bar. ( 365 PSI)TEST PRESSURE

FINISH Epoxy Red Painted

ORDERING Please specify :INFORMATION a) Model Number

b) Flow ratec) Percentage of foam

Concentrate usedd) Type of Foam Concentrate usede) Flange Connection

specification

APPLICATIONThe inline balance pressure foam proportioners areused with positive displacement foam concentratesupply pump . The system controls accurately the flowof foam concentrate into the water stream over awide range of flow rate and pressure.

INLINE BALANCE PRESSURE FOAM PROPORTIONER

The Inline Balance Pressure Foam ProportioningSystem is used for simultaneous operation of themultiple foam injection even with different pressuresbetween the two injection point with a singleconcentrate supply line. Various sizes of inline balancepressure proportioner can be combined to suit theflow requirement of each hazard area.

SPECIFICATIONInline balance pressure proportioning system utilizesa single, positive displacement foam concentratesupply pump, an atmospheric foam concentratestorage tank, inline balance proportioner, and a foamconcentrate regulating valve. The pressure regulatingvalve is mounted on foam concentrate return line tothe foam concentrate storage tank. The valve regulatesthe foam concentrate supply pressure. The Inlinebalance pressure proportioner consists of a ratiocontroller, diaphragm operated pressure balancingvalve, water and foam gauges, and pressure sensinghose of teflon tube with stainless steel braided cover,interconnecting trim fittings with various control andflush valves. The water inlet pressure and foamconcentrate pressure at metering orifice is sensedby a diaphragm valve and it automatically balances theconcentrate supply to provide accurately proportionedwater foam solution over a wide range of flowconditions. A foam concentrate supply valve is alsoprovided as an optional item. The system requires foamconcentrate supply pressure of 1.5- 2.0 bar. higherthan the water supply pressure. The Inline balancepressure proportioner is also provided with a manualbalancing valve.


D

CONNECTION

C

WATER INLET

RATIO CONTROLLER

B

WATER SENSING LINE

FLUSH OUT VALVE

DRAIN PLUG

A

OUTLETFOAM SOLUTION

FOAM CONSENTRATE

CONSENTRATE FOAM

INLET

SUPPLY VALVE

DIAPHRAGM BALANCE VALVE

FOAM GAUGE

WATER GAUGE

FOAM SENSING LINE

C

B

WATER SENSING LINE

WATER INLET

CONNECTION

CONSENTRATE

MANUAL OVERRIDE VALVE

INLET

FOAM

WATER GAUGE

FOAM GAUGE

FOAM SOLUTIONOUTLET

D

A

FOAM SENSING LINE

FOAM CONSENTRATESUPPLY VALVE

DRAIN PLUG

RATIO CONTROLLER

FLUSH OUT VALVE

DIAPHRAGM BALANCE VALVE

INLINE BALANCE PRESSURE PROPORTIONER WITHOUT MANUAL OVERRIDE

INSPECTION AND MAINTENANCEA qualified and trained person must commission thesystem. After a few initial successful tests, anauthorized person must be trained to perform theinspection and testing of the system. It isrecommended to carry out physical inspection of thesystem at least once in a week. The inspection shouldverify that all the valves are in their proper positionas per the system requirement and no damage has

DIMENSIONS

SIZE A B C D

80 NB 191 630 267 490

100 NB 264 608 278 514

150 NB 330 700 352 605

200 NB 340 718 362 625

Dimensions in millimetre (Approximate)

DIMENSIONS

SIZE A B C D

80 NB 191 545 285 427

100 NB 264 540 305 445

150 NB 330 590 360 540

200 NB 340 586 396 581

Dimensions in millimetre (Approximate)

taken place to any component. The system where foamconcentrate piping is maintained in charged condition,the provision should be made to flow foam througheach Inline Balance Proportioner at least once in sixweeks. The system should be fully tested at least oncein a year or in accordance with applicable NFPA codes,or in accordance to the guidelines of the organizationhaving local jurisdiction.

INLINE BALANCE PRESSURE PROPORTIONER WITH MANUAL OVERRIDE


13

12

11

10

9

8

7

6

5

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 )

SIZE 200NB

INLE

T PR

ES

SU

RE,

KG

./SQ

.CM

.

13

12

11

10

9

8

7

6

5

4

3

20 10 20 30 40 50 60


SIZE 150NB

INLE

T PR

ES

SU

RE,

KG

./SQ

.CM

.

70 80 90 100

FLOW VS PRESSURE LOSS

PRESSURE VS FLOW GRAPH

0.05

0.1

0.2

0.4

0.6

1.0

0.8

1 2 4 6 8 12 16 20

SOLUTION FLOW, LPM ( AXIS READING X 1000)

0.5

FRIC

TIO

N L

OS

S,

KG

. / S

Q.

CM

.

80 NB

100 NB

150 NB

200 NB

13

12

11

10

9

8

7

6

5

4

3

20 10 20 30


SIZE 80NB

INLE

T PR

ES

SU

RE,

KG

./SQ

.CM

.


TYPICAL INLINE BALANCE PRESSURE FOAM PROPORTIONING SYSTEM

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

CAUTION


TECHNICAL DATA :

MODEL RC-B Bronze materialRC-S Stainless steelmaterial

SIZE 80,100,150 and 200 NB

MAX. SERVICE 14 Bar ( 200 PSI )PRESSURE

FLOW SIZE FLOW80NB 270 to 3000LPM

100NB 650 to 5700LPM150NB 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 SSANSI B16.24 - 150# forBronze

FOAM CONCENTRATE 3% or 6%PROPORTIONINGORIFICE

FINISH Epoxy Red Painted

ORDERING Please specify :INFORMATION a) Model

b) Minimum and MaximumPressure and flow rate

c) Induction Percentaged) Type of Foam Concen-

trate usede) Flange Connection

APPLICATIONThe Ratio Controller is used for proportioning the foamconcentrate into the water supply with a wide rangeof flow and pressure. The Ratio Controller is also usedwith the Bladder proportioning system, inline balanceproportioning system and Skid mounted pump balanceproportioning system.

SPECIFICATIONThe Ratio Controller works on venturi principle. As thewater flow passes through a nozzle at the inlet of aratio controller, a low-pressure area is createdbetween inlet nozzle and the down stream section calleddiffuser. This low-pressure area causes the foamconcentrate to flow through a metering orifice at theconcentrate inlet and into the low-pressure area. Asthe system demand varies, the water jet through theRatio Controller increase or decreases, which in turnvaries the pressure at the low-pressure area of theRatio Controller. This affect the correspondingpressure across the foam concentrate-meteringorifice. The system requires same pressure of waterand concentrate to balance the proportioning system.The diaphragm valve maintains equal pressure of thewater and the foam concentrate.

RATIO CONTROLLER


DIMENSION in millimetre ( Approximate )

SIZE A B C

80 NB 192 83 1½"BSP

100 NB 266 90 1½"BSP

150 NB 332 105 2" BSP

200 NB 342 111 2" BSP

MATERIAL OF CONSTRUCTION SR.NO. DESCRIPTION MATERIAL MODEL RC-B

1 NOZZLE BRONZE IS:318 / ASTM B62

2 HOUSING BRONZE IS:318 / ASTM B62

3 CONNECTOR BRONZE IS:318 / ASTM B62

4 FLANGE BRONZE IS:318 / ASTM B62

Dimension of Inlet / Outlet Flanges ( F1) is as perANSI B16.5 for SS and ANSI B 16.24 for bronze.

SR.NO. DESCRIPTION MATERIAL MODEL RC-S

1 NOZZLE ASTM A351 - CF8 ( 304 )

2 HOUSING ASTM A351 - CF8 ( 304)

3 CONNECTOR ASTM A351 - CF8 ( 304 )

4 FLANGE ASTM A351 - CF8 ( 304 )

A

4

3

214

F1F1

CB

0.05

0.1

0.2

0.4

0.6

1.0

0.8

1 2 4 6 8 12 16 20

SOLUTION FLOW, LPM ( AXIS READING X 1000)

0.5

FRIC

TIO

N L

OS

S,

KG

. / S

Q.

CM

.

80 NB

100 NB

150 NB

200 NB

FLOW VS PRESSURE LOSS


13

12

11

10

9

8

7

6

5

4

3

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


SIZE 200NB

INLE

T PR

ES

SU

RE,

KG

./SQ

.CM

.

13

12

11

10

9

8

7

6

5

4

3

20 10 20 30 40 50 60


SIZE 150NB

INLE

T PR

ES

SU

RE,

KG

./SQ

.CM

.

70 80 90 100

13

12

11

10

9

8

7

6

5

4

3

20 10 20 30 40 50 60


SIZE 100NB IN

LET

PR

ES

SU

RE,

KG

./SQ

.CM

.

PRESSURE VS FLOW CHARACTERISTICS

13

12

11

10

9

8

7

6

5

4

3

20 10 20 30


SIZE 80NB

INLE

T PR

ES

SU

RE,

KG

./SQ

.CM

.


TECHNICAL DATA :

MODEL IG - Bronze materialIA - 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 PressurePRESSURE

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

FINISH Yellow Paint

ORDERING a) Inductor Inlet Pressure.INFORMATION b) Foam solution flow

required.c) Percentage of induction.d) Type of foam concentrate

to be used.e) Maximum suction lift.f ) Flange connection.

Inline Foam Inductor is used to induct the foam liquidconcentrate in water stream to supply proportionedsolution of the liquid concentrate and water, to thefoam producing equipment. The inductors are designedprimarily for use in the fixed foam Installation to providea simple and reliable method of proportioning inconstant flow applications. Each Inductor is designedfor a predetermined water pressure to give thecorrect proportioning at that pressure and thedischarge rate. The increase or decrease of the inletpressure will result in an increase or decrease in theflow rate, which in turn will change the proportioning.

SPECIFICATION'Inductors are available in three different materials ofconstruction, a wide range of flow from 75 to 3500litres per minute at the inlet pressure between 6.4 to12 bar as shown in the graph.

Each Inductor is accurately calibrated at the factoryto match the flow, pressure and the inductionrequirement of the system. This enables to ensureand achieve the correct performance.

APPLICATION

INLINE FOAM INDUCTOR

SYSTEM DESIGN DETAILSThe Inductor must be selected and installed in ahydraulically calculated system considering thelimitation of permissible back pressure. The maximumback pressure allowed is expressed as 65% of pressureat the inlet of the inductor.

In the fixed foam system installation the inductor canbe mounted above the concentrate storage tank.The maximum height of the Inductor suction pipe abovethe bottom of the storage tank to the inductor centreshould not exceed 1.75 meters. A minimum of 600mm of unobstructed straight pipe line should beprovided at the inlet and outlet of the inductor. Theinductor must be installed in a system having minimumof 6.4 bar inlet pressure at inlet of inductor.

The diameter of water supply pipe and water foamsolution pipe should not be less than that of thediameter of the inductor. A shut-off valve provided inthe induction line must be full bore on-off valve.

The non-return valve if fitted in the foam induction pipeline, then it must be supplied or recommended by HD,so that the induction rate is properly calibrated infactory before supply. For the best performance theinlet pressure at the inline inductor should be 6.8 baror higher.


INSTALLATION AND MAINTENANCEInductor must be supported firmly to prevent strainon the inductor itself.

Qualified and trained person must commission thesystem. After few initial successful test an authorizedperson must be trained to perform inspection andtesting of the system. It is recommended to carryout physical inspection of the system regularly. Thesystem must be fully tested at least once in a year orin accordance with applicable NFPA codes or inaccordance to the standard of the organization havinglocal jurisdiction.

Do not turn off the system or any valve to make repairor test the system, without placing a roving Fire Patrolin the area covered by the system. The Patrol shouldcontinue until the system is back in service. Also informthe local security guard and control alarm station, sothat a false alarm will not be signalled.

SELECTION OFHD INLINE FOAM INDUCTOR SIZE

Size of inductor Inductor K-Factor Range50 NB 28.4 TO 85.00

65 NB 76.0 TO 170.0080 NB 151.2 TO 340.20

100 NB 302.4 TO 680.30150 NB 604.8 TO 1030.00

For selecting Inductor size, following formula to beused :

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 with50 NB size. Hence 50 NB inductor should be selected.

NOTES1) It is recommended to select next higher size of

inductor when the K-factor is very close to thehigher range of model.

2) For the best performance the inlet pressure atthe inductor should be 6.8 bar or higher.

3) A pressuge gauge mounting socket at inlet and outlet of Inductor must be provided, which will help to analize the system during commissioning. The socket can be plugged in once the system has been commissioned successfully.

4) The maximum permissible back pressure is 65% of inlet pressure. The system designer should consider and design the system with less than 65% back pressure.


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

A

B

CF1 F2

6 2 1 75 3 4

DIMENSION in millimeter ( Approximate )

INDUCTOR A B C FLANGESIZE SIZE

F1/F250 NB 300 70 1" BSP 50 NB

65 NB 350 75 1" BSP 65 NB80 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 MODELIA IG IS

1 HOUSING AL ALLOY BRONZE S.S. 304ASTM A 351-CF8

2 NOZZLE AL ALLOY BRONZE S.S. 304ASTM A 351-CF8

3 DIFFUSER AL ALLOY BRONZE S.S. 304ASTM A 351-CF8

4 FLANGE STEEL BRONZE S.S. 304ASTM A 351-CF8

5 BOLT S.S. 304 S.S. 304 S.S. 3046 ORIFICE BRONZE BRONZE S.S. 304

7 'O' RING NEOPRENE NEOPRENE NEOPRENERUBBER RUBBER RUBBER

INLINE FOAM INDUCTOR


PRESSURE VS FLOW-PERFORMANCE CHARACTERISTICS

350

300

250

200

150

100

50

06.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12

INLET PRESSURE ( KG./SQ.CM. )

SIZE 50NB

FLO

W IN

LPM

FLO

W IN

LPM

6.5

700

600

500

400

300

200

100

07 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12


SIZE 65NB

FLO

W IN

LPM

6.5

1400

1200

1000

800

600

400

0

200

7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12


SIZE 80NB

FLO

W IN

LPM

6.5

2500

2000

1500

1000

500

07 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12


SIZE 100NB

FLO

W IN

LPM

6.5

4000

3500

3000

2500

2000

1500

1000

500

07 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12


SIZE 150NB


TYPICAL MOUNTING ARRANGEMENT OFINLINE FOAM INDUCTION SYSTEM

WITH INDUCTOR MOUNTING ON TOP OF THE TANK

WITH INDUCTOR MOUNTING BELOW THE TANK

DRAIN VALVE

STORAGE TANKFOAM CONCENTRATE

WATER SUPPLY

FILL CONNECTION

EXPANSION DOME

VENT VALVE

SIGHT GAUGE

DISCHARGE DEVICEFOAM SOLUTION TO

~

NOTE :AUTOMATION OF THIS VALVEPERMITS THE ACTIVATION OFTHIS SYSTEM FROM ANYREMOTE SIGNALLING SOURCE.

STORAGE TANKFOAM CONCENTRATE

FILL CONNECTION

EXPANSION DOME

VENT VALVE

DISCHARGE DEVICEFOAM SOLUTION TO

DRAIN VALVE

SIGHT GAUGE

WATER SUPPLY

PIPE UNION

CHECK VALVE

GATE VALVE OR BALL VALVE

INLINE INDUCTOR

NOTE :USE MINIMUM OF 600mm.STRAIGHT UNOBSTRUCTED PIPE AT INLETAND OUTLET OF EACH INLINE INDUCTOR.


TECHNICAL DATA :

MODEL BV with Bronze materialIS-318 / ASTM B62BV-S with stainless steelmaterial 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 specifyINFORMATION 1) Size

2) End connection

APPLICATIONThe foam concentrate bypass valve is used in thebalance pressure foam proportioning pump skidsystem. The valve bypasses the controlled excessquantity of foam concentrate to concentrate storagetank.

SPECIFICATIONThe valve is diaphragm operated and works on thesimple differential pressure principle. The pressuresensing lines, one from ratio controller inlet for waterpressure and another from the concentrate supplypressure above the metering orifice are connected tobypass valve. The bypass valve automatically adjuststhe concentrate pressure corresponding to the waterpressure. The bypass is provided with flush out valves.The pressure sensing hose is Teflon with stainless steelbraided cover and it is permanently attached withswivel coupling. The two separate pressure gauges,one for the water and one for the foam concentrateare provided with valve trims. A duplex gauge is suppliedas an optional item in lieu of two pressure gauges.Each valve is factory tested for its performance.

INSPECTION AND MAINTENANCEA qualified and trained person must commission thesystem. After few initial successful tests an authorizedperson must be trained to perform inspection andtesting of the system. Do not turn off the system orany valve to make repairs or test the system, withoutplacing a roving Fire Patrol in the area protected bythe system. The patrol should continue until the system

FOAM CONCENTRATE BYPASS VALVE

is back in service. Also inform the local security guardsand control alarm station, so as to avoid false alarm.

It is recommended to carry out physical inspection ofthe system at least once a week. The inspection shouldverify that all the control valves are in proper positionas per the system requirement and no damage hastaken place to any component. The valve must beoperated periodically and proper functioning must beverified. The test must be as per the procedure ofsystem testing.

The system must be flushed after each operation andfree flow of water must be drained from the flush-outconnection.

The user is responsible for maintaining the valve inproper operating condition.


GAUGEWATER PRESSURE

CONCENTRATE

FOAM PUMPINLET FROM

FOAM

WATER FLUSHOUT VALVE

FOAM FLUSHOUT VALVE

LINE FROM RATIO CONTROLLERABOVE CONCENTRATE METERING

FOAM CONCENTRATE SENSING

ORIFICE

DRAIN PLUG

RETURN LINE TO FOAM CONCENTRATE

INLET OF RATIO CONTROLLERSENSING LINE FROMWATER PRESSURE

STORAGE TANK

FOAM PRESSUREGAUGE

FOAM CONCENTRATE BY-PASS VALVE

Documents

BLADDER TANK PROPORTIONING SYSTEM