Fully Internal “Pop-Action” Pressure Relief Valves for Transports and Delivery Trucks A8434 and A8436 Series

Designed specifically for use as a primary relief valve in ASME transports and delivery trucks with 2” and 3” NPT couplings.


    • Low profile design assures maximum protection against sheering or distortion.
    • All functioning parts are located below the level of the container connection to reduce the possibility of damage or tampering.
    • Longer spring size designed to minimize stress cracking in service.
    • Use of two different materials for stem and guide minimizes the possibility of stem seizure which may occur when similar materials are used.
    • Internal octagonal wrenching broach assures easy installation and removal.
    • ASME approved for use with LP-Gas and anhydrous ammonia.


Body Stainless Steel
Spring Stainless Steel
Stem Stainless Steel
Stem Bushing 17 – 4PH Stainless Steel
Seat Disc Resilient Synthetic Rubber