Vent Relief Valve (VRV)
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VENT RELIEF VALVE 1/8" - 1" NPT .5 - 150 Psig (0.03 – 10.3 bar) 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 vent to atmosphere or inline configurations in brass, aluminum and 316 stainless steel. Valves feature a Quad ring seal which provides for extreme accuracy and repeatability with a narrow reseal band. Optional deflector cap increases flow capacity and provides for deflection of discharge. 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 Technical Data Set Pressure Range: 0.5 to 150 Psig (0.03 to 10.34 bar) Inline Valves (Series VRVI): Proof Pressure: 400 Psig (28 bar) Burst Pressure: >500 Psig (34 bar) Set Pressure Tolerance: Factory preset < 2 Psig (0.14 bar): +/-10% 2 to 150 Psig (0.14 to 10.3 bar): +/- 5% (on increasing pressure) Reseal: 80% of Set Pressure for valves specified 2-10 Psig (0.14 to 0.7 bar) 92% of Set Pressure for valves specified 10-150 Psig (0.7 to 10.3 bar) Temperature Range: -320º to 400º F (-195º C to 205º C) (based on sealing selection, see ordering information) VRVI Inline

SERIES VRV VENT RELIEF VALVE Dimensional Data VRV & VRVD 1 Available with male straight thread connections. (SAE J1926, MS33656 with cone point removed) Consult factory Materials of Construction Valve Body Material Component 1 Brass, ASTM B16 (Nickel Plated, ASTM B689) Valve Body Stem Spring Retainer Seal Stainless Steel 2024 Aluminum ASTM B211 (Clear Anodized, ASTM B580) As specified, see ordering information Spring Locknut 2024 Aluminum ASTM B211 (Clear Anodized, ASTM B580) Available in 1/8” and 1/4" valves only All 1/8” and 1/4" valves have 316 stainless steel (ASTM A479) retainers...

SERIES VRV VENT RELIEF VALVE Flow Data, Series VRV (Vent to Atmosphere) Nominal Spring Set Pressure Range Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Valve Size Consult Factory Flow Data, Series VRVD (Vent to Atmosphere, with Deflector Cap) Nominal Spring Set Pressure Range Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Valve Size Consult Factory Flow Data, Series VRVI (Inline) Nominal Spring Set Pressure Range Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Flow (SCFH) Valve Size Notes to...

SERIES VRV VENT RELIEF VALVE Ordering Information VRV – Vent to Atmosphere VRVD – Vent to Atmosphere with Deflector Cap VRVI – Inline Relief (Male x Female) (TeflonTM Seals not available below 20 Psig) Valves that are not actuated for a period of time may exhibit higher initial crack pressure (first bubble) than subsequent cycles V - VitonTM, -10°F to 375°F (-23°C to 190°C) B – Buna-N, -40° F to 250° F (-40° C to 121° C) N – Neoprene, -40° F to 250° F (-40° C to 121° C) EP – Ethylene Propylene, -65° F to 300° F (-54° C to 148° C) FS – Fluorsilicone, -80° F to 350° F (-62° C to 176° C) S -...