Product details
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G-Series Pressure Relief Valves
Griffco G-Series medium-flow 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. Also called bypass pressure valves.
Features & Benefits
Valve Features
- Anti-siphon function
- 2-port and 3-port configurations (90° and 180°)
- Solid, robust, machined construction
- Flanged, union, threaded and socket connection options
- Molded Noryl top with integral hardware locking
- 316L SS metal valve and top options
- Molded PTFE/EPDM diaphragm
- 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 300°F (149°C)
Griffco Benefits
- High reliability at affordable price
- Long diaphragm life
- Wide range of valve materials
- Multiple diaphragm material options
- Factory or field settable
Additional Notes
Available Sizes
- 1/2" to 4" or DN 15 to DN 100
Wetted Materials
- PVC
- CPVC
- Polypropylene
- PVDF
- PTFE
- Halar®
- 316 SS
- Alloy 20
- Hastelloy® C
Performance
| MPN | Size (Inch) | Size (Metric) | Max Flow Pulsating (GPH) |
Max Flow Pulsating (LPH) |
Max Flow Continuous (GPM) |
Max Flow Continuous (LPM) |
Max Pressure (PSI) | Max Pressure (BAR) |
|---|---|---|---|---|---|---|---|---|
| PRG-050 | 1/2" | DN 15 | 300 | 1,135 | 21 | 80 | 350 | 24 |
| PRG-075 | 3/4" | DN 20 | 300 | 1,135 | 21 | 80 | 350 | 24 |
| PRG-100 | 1" | DN 25 | 500 | 1,890 | 26 | 98 | 350 | 24 |
| PRG-155 | 1-1/2" | DN 40 | 1,200 | 4,542 | 63 | 238 | 250 | 17 |
| PRG-200 | 2" | DN 50 | 2,350 | 8,892 | 120 | 473 | 250 | 17 |
| PRG-300 | 3" | DN 80 | 5,200 | 19,600 | 270 | 1,020 | 250 | 17 |
| PRG-400 | 4" | DN 100 | 5,200 | 19,600 | 270 | 1,020 | 250 | 17 |
Exploded view
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