Parker Hannifin RL4 Series Relief Valves

Parker RL4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increases proportionately to the increase in upstream pressure.

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RL4 Series

142 items

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  • Parker 4M4F-RL4A-VT-SS-MN-KD
    4M4F-RL4A-VT-SS-MN-KD Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-VT-SS-MN-KD

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4 MNPT inlet x 1/4" FNPT outlet, 100-150 psig crack pressure, fluorocarbon rubber seal, with manual override
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  • Parker 4M4F-RL4A-VT-SS-MN-KC
    4M4F-RL4A-VT-SS-MN-KC Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-VT-SS-MN-KC

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" FNPT (outlet), 50-100 psig crack pressure, fluorocarbon rubber seal, with manual override
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  • Parker 4M4F-RL4A-VT-SS-MN-KA
    4M4F-RL4A-VT-SS-MN-KA Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-VT-SS-MN-KA

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4 MNPT inlet x 1/4" FNPT outlet, 0-25 psig crack pressure, fluorocarbon rubber seal, with manual override
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  • Parker 4M4F-RL4A-VT-SS-KD
    4M4F-RL4A-VT-SS-KD Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-VT-SS-KD

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" FNPT (outlet), 100-150 psig crack pressure, fluorocarbon rubber seal
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  • Parker 4M4F-RL4A-VT-SS-KA
    4M4F-RL4A-VT-SS-KA Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-VT-SS-KA

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4 MNPT inlet x 1/4" FNPT outlet, 0-25 psig crack pressure, fluorocarbon rubber seal
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  • Parker 4M4F-RL4A-VT-SS
    4M4F-RL4A-VT-SS Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-VT-SS

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" FNPT (outlet), crack pressure, fluorocarbon rubber seal, without spring kit
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  • Parker 4M4F-RL4A-KZT-SS-KE
    4M4F-RL4A-KZT-SS-KE Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-KZT-SS-KE

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" FNPT (outlet), 150-225 psig crack pressure, Kalrez seal
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  • Parker 4M4F-RL4A-EPRT-SS-MN-KC
    4M4F-RL4A-EPRT-SS-MN-KC Parker RL4A-Series Adjustable Relief Valve
    4M4F-RL4A-EPRT-SS-MN-KC

    Parker Hannifin

    Product Type: Relief Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RL4A-Series Adjustable Relief Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" FNPT (outlet), 50-100 psig crack pressure, EPR seal, with manual override
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