Specific valve types are available for gas, vapor, liquid; gas or liquid thermal relief, cryogenic and chemically active applications.
Sizes: ½” x 1” to 2” x 3” (DN 15 to 50)
Orifices: 0.049 to 1.287 in2 (0.316 to 8.303 cm2)
Connections: NPT, Flanged
Temperature range: -65°F to + 400°F (-54°C to + 205°C)
Set pressures: 50 to 6,000 psig (3.34 to 413.7 barg)
Code: ASME VIII
Type 81P spindle design balanced against the effects of back pressure without the use of a bellows, reducing both initial purchase and associated long-term maintenance costs.
Seat Tightness Performance Specifications
All pressure relief valves are checked for seat leakage per procedures outlined in API 527. The following operating pressures will allow for bubble-tight seat sealing performance.