VRVH-125B-V-215 - Vent Relief Valve, Vent to Atmosphere, 1/8" Brass, Viton Seal, 215PSIG

Vent Relief Valve - Series VRVD (Vent to Atmosphere, with Deflector Cap)

1/8" - 1" NPT
.5 - 150 Psig

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 defector cap increases flow capacity and provides for deflection of discharge.

Features and Benefits

Accurate and Repeatable Cracking Pressure
100% Factory Present 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 (0.3 to 10.3 bar)
Inline Valves (Series VRVI)
Proof Pressure: 400 Psig (28 bar)
Burst Pressure: >500 Psig (34 bar)
Reseal:
80% of Set Pressure for valves specified 1-10 Psig (0.07 to 0.7 bar)
92% of Set Pressure for valves specified 10-150 Psig (0.7 to 10.3 bar)
Temperature Range: -320°F to 400°F (-195°C to 205°C)
(Based on seal selection, see ordering information)

Crack Pressure and Reseal Characteristics

Crack Pressure Tolerance +/- 5% of desired setting
Crack Pressure: Elastomer Seals 5cc/min Flow PTFE Seals 0.02 SCFM Flow
Leakage below Cracking Pressure: Elastomer Seals Zero to 98% of Crack
Leakage below Cracking Pressure: PTFE Seals 1cc/min to 80% of Crack
Nominal Reseal: 80% of Crack, for valves set at 1-10 PSI
Nominal Reseal: 92% of Crack, for valves set at 10-150 PSI

Materials of Construction

Valve Body: Brass, ASTM B16 (Nickel Plated, ASTM B689); 2024 Alumimum ASTM B211 (Clear Anodized, ASTM B689); 316 SS ASTM A479
Stem Spring Retainer: Brass, ASTM B16; 2024 Alumimum ASTM B211 (Clear Anodized, ASTM B689); 316 SS ASTM A479 (All 1/8" and 1/4" valves have 316 stainless steel (ASTM A479) retainers)
Seal: As specified, see ordering information (Lubricated with KrytoxTM GPL 202)
Spring: 302 SS/17-7 PH, ASTM A313
Locknut: 18-8 SS
Deflector Cap and Rivet: 2024 Aluminum ASTM B211 (Clear Anodized, ASTM B580)

Notes to Flow Data

Flow and Kd (discharge coefficent) are stated at 110% accumulation above set point with Nitrogen and Zero Downstream Pressure
Interpolate charts for set pressures between points given
Restrictions in the inlet or outlet piping may reduce flow
Exceeding 115% accumulation may result in valve failure
Generant offers complete design assistance. Consult factory for correct relief valve sizing.
Individual flow curves available on request
Orifice sizes are stated in inches

OPTIONS
Oxygen cleaning, alternative seals and other thread configurations, consult the factory

⚠	WARNING:This product can expose you to chemicals including Lead which is known to the state of California to cause cancer, birth defects or reproductive harm. For more information, go to www.p65warnings.ca.gov.

Generant Vent Relief Valves

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