Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

SprinSpringg

OrificOrificee

PlugPlug

SprinSpringg

OrificOrificee

PlugPlug

1/2”,3/4” 1/2”,3/4” 1”,2”,3”,4”1”,2”,3”,4”

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

In Line TypeIn Line Type Y TypeY Type

PVC & CPVC ANSI FlangedPVC & CPVC ANSI Flanged

High durabilityHigh durability and resistance to chemicals and resistance to chemicalsHigh accuracyHigh accuracyFlexibleFlexible flow rate flow rateOpening degree indicatorOpening degree indicator

High durability and resistance to High durability and resistance to chemicalschemicalsThe spring is made of stainless steel with coating of The spring is made of stainless steel with coating of PCTFE.PCTFE.

ETFE acts as an ETFE acts as an excellent gas barrierexcellent gas barrier to chemicals such to chemicals such as Clas Cl22,HF,HNO,HF,HNO33,HCL and so on.,HCL and so on.

The superior durabilityThe superior durability has been proven by conducting a has been proven by conducting a repeated spring fatigue test repeated spring fatigue test ..(1 Million cycles)(1 Million cycles)

Features & BenefitsFeatures & Benefits

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Flexible flow ratesFlexible flow rates

Opening degree Opening degree indicatorindicator

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Calibrated Flow DialCalibrated Flow Dial

Nominal Size

Body material

Flange connection

Upstream line Pressureranges.

Pressure differentialrange for function:

(Please specify according to upstream pressure)

Types Under 35 psi 36 - 70 psi

71 - 110 psi111 - 150 psi

2.85 - 14.22 psi : Type A & B4.27 - 21.33 psi : Type D (only 3”)4.27 - 28.45 psi : Type C

Working Temp. : 30 - 120 °F

ANSI, DIN etc.

PVC (Unplasticized Polyvinyl Chloride)

1/2”, 3/4”, 1”, 2”, 3” ,4”

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Nominal

Size (kgf/cm2)

1/2" B 0.176 - 3.52 0.04 - 0.8 20 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)(15mm) C 0.35 - 3.52 0.08 - 0.8 10 : 1 4.27 - 28.45 0.03 - 0.2 (0.3-2.0)

3/4" B 0.26 - 5.28 0.06 - 1.2 20 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)(20mm) C 0.53 - 5.28 0.12 - 1.2 10 : 1 4.27 - 28.45 0.03 - 0.2 (0.3-2.0)

1" A 2.2 - 8.81 0.5 - 2.0 4 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)(25mm) B 0.441 - 8.81 0.1 - 2.0 20 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)

C 0.881 - 8.81 0.2 - 2.0 10 : 1 4.27 - 28.45 0.03 - 0.2 (0.3-2.0)

2" A 8.81 - 35.22 2.0 - 8.0 4 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)(50mm) B 1.76 - 35.22 0.4 - 8.0 20 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)

C 3.52 - 35.22 0.8 - 8.0 10 : 1 4.27 - 28.45 0.03 - 0.2 (0.3-2.0)

A 22.02 - 88.07 5.0 - 20.0 4 : 1 4.85 - 14.22 0.02 - 0.1 (0.2-1.0)3" B 4.403 - 88.07 1.0 - 20.0 20 : 1 2.85 - 14.22 0.02 - 0.1 (0.2-1.0)

(80mm) C 8.81 - 88.07 2.0 - 20.0 10 : 1 4.27 - 28.45 0.03 - 0.2 (0.3-2.0)D 66.04 - 132.1 15.0 - 30.0 2 : 1 4.27 - 21.33 0.03 - 0.15 (0.3-1.5)

4" C 44.03 - 264.2 10 - 60 6 : 1 4.27 - 28.45 0.03 - 0.2 (0.3-2.0)(100mm) D 132.1 - 264.2 30 - 60 2 : 1 2.85 - 21.33 0.02 - 0.15 (0.3-1.5)

PSI Mpa

Pressure differencial range for functionType

Gal/min m3/hr

Flow quantityRangeability

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Type - BType - B

Flow rate setting range is Flow rate setting range is large.large.(Covers small flow rates to (Covers small flow rates to large flow rates)large flow rates)

Flow

Flow

Type - AType - A

Fluid flows through the valves Fluid flows through the valves internalsinternalsSuitable for semi-conductor.Suitable for semi-conductor.(Ultra pure water line)(Ultra pure water line)

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Range of working differential pressure is large .(For lines with large pressure differential between upstream & downstream)

Type - CType - C

Flow

Type - DType - DA large flow rate can be set.

Flow

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

P1P2 P2

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Pressure Pressure DifferentialDifferential

It is possible to change the It is possible to change the flow quantity by changing flow quantity by changing the position of the plug.the position of the plug.

High High accuracyaccuracy

Flo

w Q

uan

tity

Flo

w Q

uan

tity

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

B type (2”) C type (2”)

Differential Pressure (psi)

Flo

w (

gal/

min

)

2.85 psi - 14.22 psi

39.6

35.2

30.8

26.4

22.0

17.6

13.2

8.8

4.4

02.85 5.7 8.6 11.4 14.3 17.1 20 22.9 25.7 28.6 31.4 34.3 37.1

35.2

30.8

26.4

22.0

17.6

13.2

8.8

4.4

0 2.85 5.7 8.6 11 14.22

Flo

w (

gal/

min

)

39.6

Differential Pressure (psi)

4.27 psi - 28.45 psi

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Q1+Q2

Q1

Q2

LINE A

LINE B

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Parallel LinesParallel Lines

CV = Q s.g. / P] (Q = flowrate (gpm) s.g. = specific gravity)

< Fish Farms ><Aquariums>

seawatertank

AV Constant Flow VALVE

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

< Salt Water >< Salt Water >

The protection of ion-exchange membranes.

Flow quantity is fixedFlow quantity is fixed.

No Automation or No Automation or Manual AdjustmentManual AdjustmentRequiredRequired

Asahi/Asahi/AmericaAmerica

Constant Flow Constant Flow ValvesValves

Applications:Applications:

AV Constant Flow VALVEWatersupply

equipment

Asahi/AmericaAsahi/AmericaConstant Flow ValvesConstant Flow Valves

Water Supply or FiltrationWater Supply or Filtration