Vent Relief Valve High Pressure (VRVH)
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Catalog excerpts

VENT RELIEF VALVE Description A compact, highly accurate, direct acting pressure relief valve. Factory preset to desired crack pressure and/or flow specifications. Internal adjustment provides tamper proof safety against inadvertent pressure changes. Available in vent to atmosphere or inline configurations. Valves feature an encapsulated O-ring seal to prevent extrusion at higher differential pressures. Features and Benefits • Accurate and Repeatable Cracking Pressure • 100% Factory Preset and Tested • Zero Leakage to 95 – 98% of Set Pressure • Tamper Proof Adjustment • Excellent Reseal Performance • Compact Size VRVH Vent to Atmosphere Technical Data • Set Pressure Range: 150 to 600 Psig (10.3 to 42 bar) • Inline Valves (Series VRVHI): Proof Pressure: 750 Psig (52 bar) Burst Pressure: >1000 Psig (69 bar) • Set Pressure Tolerance: Factory preset +/- 5% on increasing pressure: • Reseal: 90% of Set Pressure • Temperature Range: -320°F to 350°F (-195°C to 177°C) based on seal selection, see ordering information Materials of Construction Component Valve Body, Stem, O-Ring Cup Spring Retainer As specified, see ordering information Lubricated with Krytox™

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SERIES VRVH VENT RELIEF VALVE Dimensional Data Pipe Size NPT 1/8” 1/4" Dimensional data is stated in inches Flow Data, Series VRVH (Vent to Atmosphere) Flow Data, Series VRVHI (Inline) Nominal Spring Set Pressure Range (Psig) Valve Size Flow (SCFM) Flow (SCFM) Nominal Spring Set Pressure Range (Psig) Flow (SCFM) Valve Size Flow (SCFM) Flow (SCFM) Flow (SCFM) Ordering Information VRVHI – 250 B – V - 450 SERIES VRVH – Vent to Atmosphere VRVHI – Inline Relief (Male x Female) NOMINAL SET PRESSURE Specify 150-600 Psig Valves that are not actuated for a period of time may exhibit higher initial...

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