High Pressure Relief Valve (HPRV)

High Pressure Relief Valve (HPRV)
High Pressure Relief Valve (HPRV)
High Pressure Relief Valve (HPRV)
High Pressure Relief Valve (HPRV)

1/8” - 3/4” NPT
Set Pressure Range 10 - 2400 Psig


The HPRV Series Relief Valve provides accurate crack pressure with zero leakage up to 98% of nominal set pressure. When properly specified, this factory preset, tamper proof design, is ideally suited for most any liquid or gas application. Encapsulating the o-ring seal within the poppet eliminates seal extrusion and cold flow characteristics. By guiding the poppet into the body, a line of contact seal is ensured and at high crack pressure settings, the o-ring is protected by a metal-to-metal stop between the poppet and the body. High flow design, combined with narrow band interchangeable springs, minimizes system pressure rise as flow demand increases. Available in brass or stainless steel and inline or discharge to atmosphere. Valves can be supplied with a manual pull ring override.


  • 100% Factory Preset and Tested
  • Zero Leakage to 95 – 98% of Set Pressure
  • Tamper Proof Adjustment
  • Excellent Reseat Performance

Technical Data

  • Set Pressure Range: 10 to 2400 Psig (0.7 to 166 bar)
  • Set Pressure Tolerance: Factory Preset +/– 5% on increasing pressure
  • Reseat: Elastomer Seals 90% – 95% of Actual Crack Pressure
    • PTFE may be slightly lower
  • Inline Valves (Series HPRV):
    • Proof Pressure: 3700 Psig (225 bar)
    • Burst Pressure: >5000 Psig (345 bar)
  • Temperature Rating: -320°F to 400°F (-220°C to 205°C)
    • Based on seal selection
  • Click here to download product literature

    Click here to download user instructions