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    Vapor Relief Valves

    For installation in the vapor area of Anhydrous Ammonia containers. Their function is to open and relieve the pressure when it exceeds the designed working pressure of the container. They permit a gradual opening to relieve moderately excessive pressure and accelerate to full discharge capacity when pressure increases beyond the allowable set pressure.

    All Vapor Relief Valves are permanently marked with their identifying catalog number, date of manufacture, *removal date, set pressure, and flow capacity. All ammonia tanks should have provision for vapor relief valves with adequate capacity to meet discharge requirements. These valves meet ASME standards.

    * Removal date is 5-years from date of manufacture. Set at 250 PSI (ST A1310B at 265 PSI).
    0Types Available
    Dust Cap Only For A402VA Vapor Relief Valve
    Dust Cap For A402VA, Repair Parts
    SKU: CNA402NDCC
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    $5.45 / EA
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    Picture of Vapor Relief Valve with 3/4" MPT Inlet, 1-3/4" Wrench Size, 3-1/2" Overall Height, 250 PSI, 1487 CFM/Air (ASME)
    Vapor Relief Valve with 3/4" MPT Inlet, 1-3/4" Wrench Size, 3-1/2" Overall Height, 250 PSI, 1487 CFM/Air (ASME)
    Valve, Vapor Relief With 3/4IN Mpt Inlet, Dust Cap, 250 Psi
    SKU: CNA402VA
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    Picture of Vapor Relief Valve with 1-1/4" MPT Inlet, 3" Wrench Size, 8" Overall Height, 250 PSI, 5297 CFM/Air (ASME)
    Vapor Relief Valve with 1-1/4" MPT Inlet, 3" Wrench Size, 8" Overall Height, 250 PSI, 5297 CFM/Air (ASME)
    Relief Valve, 1-1/4IN, 250PSI
    SKU: CNA417A
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    $237.00 / EA
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    Dust Cap Only For A417A Vapor Relief Valve
    Dust Cap With Chain, Repair Parts
    SKU: CNA417DCC
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    Picture of Vapor Relief Valve with 3/4" MPT Inlet
    Vapor Relief Valve with 3/4" MPT Inlet
    Vapor Relief Valve With 3/4IN Mpt Inlet, 250 Psi
    SKU: STA1301A
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    $68.50 / EA
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    Picture of Vapor Relief Valve with 1-1/4" MPT Inlet, 250 PSI
    Vapor Relief Valve with 1-1/4" MPT Inlet, 250 PSI
    Vapor Relief Valve With 1-1/4IN Mpt Inlet, 250 Psi Rating, 5112 SCFM Air ASME
    SKU: STA1310A
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    Picture of Vapor Relief Valve with 1-1/4" MPT Inlet, 265 PSI
    Vapor Relief Valve with 1-1/4" MPT Inlet, 265 PSI
    Relief Valve, 1-1/4IN, 265PSI
    SKU: STA1310B
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    $286.00 / EA
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