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.

Features
Accurate and Repeatable Cracking Pressure
100% Factory Preset and Tested
Zero Leakage to 95 – 98% of Set Pressure
Tamper Proof Adjustment
Excellent Reseat 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%
Reseat:
50% of Set Pressure for valves specified 0.5 – 1.9 Psig (0.03 to 0.13 bar)
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 (0.70 to 10.3 bar)
Temperature Rating: -320˚F to 400˚F (-195˚C to 205˚C)
(based on sealing selection)
Materials of Construction
Available in Aluminum, Brass or 316 Stainless Steel