|
Download the Datasheet!
|
Griffco diaphragm back pressure valves are designed to enhance the performance of chemical feed systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-syphon valve.
Robust construction ensures reliability in the rigorous service of municipal and industrial applications. Wetted materials include: PVC, CPVC, PP, PVDF, PTFE, 316 SS, A 20 and Hast. C.
Available sizes: ½ - 2".
|
|
Features:
- High Reliability / Low Cost
- Robust, Machined Construction
- Vulcanised PTFE/EPDM Diaphragm
- Adjustable 10 - 150 PSI
- Optional 350 PSI Rated Valve
- Anti-Siphon Function
- Wide Range of Materials
- Tamper Resistant Adjustment Screw
- Corrosion Resistant Design
|
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 o 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 BPV
|
½", ¾", 1", 1½", 2"
|
| Connections: |
NPT, Socket, Flange |
| Pressure Adjustment |
0-50 psi, 10-150 psi, 50-350 psi |
| Flow Rates @ 150 psi |
Shipping Weight: lbs |
| Size |
Pulsating |
Continuous |
Plastic |
Metal / Plastic Top |
Metal / Metal Top |
1/2"
3/4"
1"
1 1/2"
2"
|
320 USgph
367 USgph
461 USgph
1388 USgph
2000 USgph
|
16 USgpm
19 USgpm
24 USgpm
72 Usgpm
104 USgpm
|
3.0
3.0
3.5
9.0
9.0
|
5.5
5.5
6.0
18.5
20.0
|
6.5
6.5
7.0
26.0
30.0
|
| Max Temperature: (°F) |
Plastic: 140° ; Metal: 300° (Peak Short Term 390°) |
| Materials of Construction: |
|
| Diaphragm |
PTFE / EPDM, Optional: Viton & PTFE / Viton |
| Valve Top |
Standard: PVC
Optional: CPVC, Steel, 316 SS, Others on Request |
| Valve Body |
PVC, CPVC, PP, PTFE, PVDF, 316 SS, A 20, Hast. C, Others on Request |
Dimensions:
| D |
A |
B |
C |
| 1/2" |
5.60 |
3.50 |
1.10 |
| 3/4" |
5.60 |
3.50 |
1.10 |
| 1" |
5.90 |
3.50 |
1.25 |
| 1 1/2" |
8.95 |
4.50 |
2.10 |
| 2" |
8.95 |
5.00 |
2.10 |
|
Performance Curves:
|
Component Drawing:
|
