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High Flow Series Back Pressure Valves
Griffco high flow diaphragm back pressure valves are designed to enhance the performance of higher flow, continuos feed pumps that require a constant head pressure, while also acting as an anti-syphon valve.
Larger orifice sizes make the valve ideal for use with higher viscosity fluids. Wetted materials include: PVC, CPVC, PP, PVDF, PTFE, 316 SS, A 20 and Hast. C.
Available in ½", ¾" and 1" sizes.
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Features:
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High Reliability / Low Cost
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Large Orifice for High Viscosity Fluids
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Higher Flow / Lower Pressure Drop
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Adjustable 10 - 150 PSI
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Anti-Siphon Function
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Robust, Machined Construction
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Vulcanised PTFE/EPDM Diaphragm
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Wide Range of Materials
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Operation:
Griffco diaphragm back pressure valves
apply positive discharge pressure to a metering pump system
to prevent siphoning and eliminate varying dosage rates caused
by fluctuating downstream pressure. The diaphragm is held against
the valve seat by an internal spring. When the preset pressure
is exceeded, the diaphragm is forced up and chemical flows through
the valve to the injection point. The valves are preset for
50 psi, however they are field adjustable from 10 - 150 psi
via the adjustment screw. Installation should be as close to
the injection point as possible to prevent chemical line drainage,
and it is most important that all chemical system equipment
such as pulsation dampeners and pressure gauges are between
the pump and back pressure valve.
Technical Data:
Sizes:
Model BPHF
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½", ¾", 1"
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| Connections: |
NPT, Socket, Flange |
| Pressure Adjustment |
10-50 psi, 10-150 psi |
| Flow Rates @ 150 psi |
Shipping Weight: lbs |
| Size |
Pulsating |
Continuous |
Plastic |
Metal / Plastic Top |
Metal / Metal Top |
1/2"
3/4"
1"
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600 USgph
600 USgph
1000 USgph
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30 USgpm
30 USgpm
54 USgpm
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3.5
3.5
7.0
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6.0
6.0
14.0
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7.0
7.0
23.0
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| Max Temperature: (°F) |
Plastic: 140° ; Metal: 300° (Peak
Short Term 390°) |
| Materials of Construction: |
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| Diaphragm |
PTFE / EPDM, Optional: Viton & PTFE /
Viton |
| Valve Top |
Standard: PVC
Optional: CPVC, Steel, 316 SS |
| Valve Body |
PVC, CPVC, PP, PTFE, PVDF, 316
SS, A 20, Hast. C, Others on Request |
Dimensions:
| D |
A |
B |
C |
| 1/2" |
5.90 |
3.50 |
1.25 |
| 3/4" |
5.90 |
3.50 |
1.25 |
| 1" |
7.25 |
4.50 |
1.875 |
Performance Curves:
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