The HPRV Series High Pressure Relief Valve provides accurate crack pressure with zero leakage up to 98% of set pressure. This factory preset, tamper proof design is ideally suited for most liquid and gas applications. Encapsulating the o-ring seal within the poppet prevents seal extrusion and cold flow.
Available in brass or stainless steel, inline or discharge to atmosphere configurations, with optional manual pull ring override and oxygen service cleaning. Set pressures from 10 to 2400 PSIG across 1/8" to 3/4" NPT sizes.
- 100% Factory Preset and Tested
- Zero Leakage to 95–98% of Set Pressure
- Tamper Proof Adjustment
- Excellent Reseat Performance: 90–95% of actual crack pressure
- O-ring encapsulated in poppet — prevents seal extrusion and cold flow
- High flow design with narrow band interchangeable springs minimizes pressure rise
- Available in Brass, 303 SS, or 316 SS
- Inline (HPRV), Vent to Atmosphere (HPRVA), or Manual Override (HPRVM)
- Optional Lockwire and Oxygen Service cleaning
- Set Pressure Range: 10 to 2400 PSIG (0.7 to 166 bar)
- Set Pressure Tolerance: ±5% on increasing pressure
- Reseat: 90–95% of actual crack pressure
- Zero Leakage to 95–98% of Set Pressure
- Temperature Range: -320° to 400°F (-220° to 204°C) based on seal selection
- Inline (HPRV) Proof Pressure: 3700 PSIG | Burst: >5000 PSIG
- Note: Teflon (T) seal only available for set pressures 50 PSI and above
- Note: HPRVM (Manual Override) available for 10–1200 PSI only
- Note: 1/8" and 3/8" NPT available in Brass only; 3/4" NPT available in Brass and 316 SS only
