Valves
Relief Valves
Our PRV-S6 series relief valves protect high-pressure gas systems from overpressure. A spring-loaded poppet opens progressively as pressure reaches the factory-set value and reseats automatically once it falls, and a lockable cap keeps the calibrated setting secure. Built in 316 stainless steel with FFKM seals for CNG dispenser service, every valve is factory set and tested before despatch.
Set pressure
Factory set, up to 6,000 psi
Max temperature
211.7 °C (413 °F)
Body
SS 316
Connections
1/4" NPT male × female
Key features
Spring-loaded poppet opens progressively at the set pressure and reseats automatically when pressure falls
Factory set to the pressure on your order, with a lockable cap that protects the setting
316 stainless steel construction with FFKM seals for high-temperature CNG service
Every valve tested with dry nitrogen for leakage, set-pressure operation and reseating
Technical specifications
| Series | PRV-S6, angle-pattern proportional relief valve |
|---|---|
| Set pressure | Factory set to order, up to 6,000 psi (414 bar) |
| Maximum temperature | 211.7 °C (413 °F) |
| Body | Stainless steel, ASTM A182 F316 |
| Bonnet, spindle and cap | Stainless steel, ASTM A479 Type 316 |
| Spring | 17-7 PH stainless steel (S17700) |
| Seat and O-rings | FFKM, high-temperature CNG grade |
| Connections | 1/4" NPT male inlet × 1/4" NPT female outlet, to ASME B1.20.1 |
| Orifice | 6.0 mm |
| Testing | Every valve tested with dry nitrogen for external leakage, set-pressure operation and resealing |
| Certificates | Material test certificates and final test certificates available with the order |
Configurations
Angle pattern, 1/4" NPT M × F
Factory set to order
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Need a custom solution?
Send us your drawing or specification. Our engineers will work out the right part with you.
