External Hydrostatic Relief Valves 3125, 3127, 3129, SS8001, SS8002, SS8021 and SS8022 Series


Designed especially for the protection of piping and shut-off valves where there is a possibility of trapping liquid LP-Gas or anhydrous ammonia. They may be installed in pipelines and hoses located between shut-off valves or in the side boss of RegO® shut-off valves.


    • Relief valve designed to automatically reseat firmly after discharge.
    • Resilient seat disc provides a “bubble-tight” seal.
    • Available in both brass and stainless steel.
    • Available in configurations that permit direct attachment of vent piping when required.


Body (3125, 3127, 3129) Brass
Body (SS8001, SS8002, SS8021, SS8022) Stainless Steel
Spring Stainless Steel
Seat Disc Resilient Rubber