Griffco G-Series diaphragm pressure relief valves are designed to protect chemical feed systems from over pressure damage caused by defective equipment or a blockage in the chemical feed line. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.
Wetted Materials:
- PVC
- CPVC
- PP
- PVDF
- PTFE
- Halar®
- 316 SS
- Alloy 20
- Hastelloy®C
Available Sizes:
- 1/2" to 4" or DN 15 to DN 100
Features & Benefits:
- High reliability at a low cost
- Anti-siphon function
- 2-port and 3-port configurations (90º and 180º)
- Solid, robust, machined construction
- Wide range of materials
- Flanged, union, threaded and socket connection options
- Molded Noryl top with integral hardware locking
- 316L metal valve and top options
- Molded PTFE/EPDM diaphragm
- Multiple diaphragm material options
- Long diaphragm life
- Adjustable up to 350 psi (24 bar)
- 4 optional pressure ratings (springs)
- Valve sizes from 1/2" to 4" or DN 15 to DN 100
- Tamper-resistant adjustment screw
- High-temperature option up to 300ºF (149ºC)
- Factory or field settable
Download Technical Data Sheet: Imperial (US) | Metric (International)
| Sizes, Flow Capacities & Pressure Ratings |
| Size |
Maximum Flow |
Maximum Pressure |
| Pulsating |
Continuous |
| Inch |
Metric |
GPH |
LPH |
GPM |
LPM |
PSI |
BAR |
| 1/2" |
DN 15 |
300 |
1,135 |
21 |
80 |
350 |
24 |
| 3/4" |
DN 20 |
300 |
1,135 |
21 |
80 |
350 |
24 |
| 1" |
DN 25 |
500 |
1,890 |
26 |
98 |
350 |
24 |
| 1-1/2" |
DN 40 |
1,200 |
4,542 |
63 |
238 |
250 |
17 |
| 2" |
DN 50 |
2,350 |
8,892 |
120 |
473 |
250 |
17 |
| 3" |
DN 80 |
5,200 |
19,600 |
270 |
1,020 |
250 |
17 |
| 4" |
DN 100 |
5,200 |
19,600 |
270 |
1,020 |
250 |
17 |
