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Relief Valves

1,287 products found

Help protect pipelines against excess pressure with a relief valve from Grainger. Choose from a wide range of pressure relief valves that can release pressurized fluid through an auxiliary exhaust pathway. A relief valve is designed to open at a specific pressure to help protect pumps and other equipment from exceeding stress limits. When pressure rises above the set limit, a safety valve can divert liquids, gases or a liquid-gas mixture to a flare header to help relieve pressure and normalize. Choose from relief valves with manual levers, spring-operated types and more at Grainger.Close

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  • Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    5DLZ1
    Mfr. Model #
    1/2 LF 530-C STD
    Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet&#
    Web Price $32.60 / each
  • Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X150
    Mfr. Model #
    3/4 740-050
    Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet
    Web Price $132.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    2P074
    Mfr. Model #
    174 A-3/4"
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $72.75 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X182
    Mfr. Model #
    3/4 174A-125
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $78.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X183
    Mfr. Model #
    3/4 174A-150
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $76.75 / each
  • Iron/Bronze Combination Fill and Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    4A822
    Mfr. Model #
    1450F
    Iron/Bronze Combination Fill and Relief Valve, FNPT Inlet&#
    Web Price $94.25 / each
  • Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LD85
    Mfr. Model #
    6010EDM01-KM-125
    Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $273.00 / each
  • Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    3EEY2
    Mfr. Model #
    13211B15
    Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $57.25 / each
  • Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LH25
    Mfr. Model #
    0930-H01-GC-15
    Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT O
    Web Price $275.00 / each
  • Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    5NKY6
    Mfr. Model #
    6010FEE01-AM0150
    Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $262.00 / each
  • Lead-Free Brass Vacuum Relief Valve, MNPT Inlet Type, MNPT Outlet Type

    Brand
    WATTS
    Item #
    5DLZ3
    Mfr. Model #
    1/2 LF N36
    Lead-Free Brass Vacuum Relief Valve, MNPT Inlet Type, MNPT&
    Web Price $40.50 / each
  • Stainless Steel Purge Valve, MNPT Inlet Type, MNPT Outlet Type

    Brand
    PARKER
    Item #
    5ULR9
    Mfr. Model #
    4M-PG4L-SS
    Stainless Steel Purge Valve, MNPT Inlet Type, MNPT Outlet&#
    Web Price $39.60 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    1CKW7
    Mfr. Model #
    1060534
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $153.00 / each
  • Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X154
    Mfr. Model #
    1 1/4 740-050
    Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet
    Web Price $368.50 / each
  • Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    3ETU4
    Mfr. Model #
    55B-50
    Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outle
    Web Price $46.20 / each
  • Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    2X318
    Mfr. Model #
    530-3/4
    Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type,
    Web Price $31.30 / each
  • Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    3ETU3
    Mfr. Model #
    55A-50
    Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outle
    Web Price $43.20 / each
  • Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LH27
    Mfr. Model #
    0930-K01-GC-15
    Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT O
    Web Price $626.00 / each
  • Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    5NKY1
    Mfr. Model #
    6010EDE01-AM0150
    Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $233.00 / each
  • Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    5DLZ2
    Mfr. Model #
    3/4 LF 530-C STD
    Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet&#
    Web Price $42.40 / each
  • PVC Adjustable Back Pressure Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    PLAST-O-MATIC
    Item #
    11G098
    Mfr. Model #
    RVD050V-PV
    PVC Adjustable Back Pressure Relief Valve, FNPT Inlet Type,
    Web Price $246.50 / each
  • Brass Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    CASH ACME
    Item #
    6RKF1
    Mfr. Model #
    F-30
    Brass Safety Relief Valve, MNPT Inlet Type, FNPT Outlet
    Web Price $18.65 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, MNPT Outlet Type

    Brand
    SPENCE
    Item #
    1RYF3
    Mfr. Model #
    0031EEA-150
    Bronze Safety Relief Valve, FNPT Inlet Type, MNPT Outlet&#x
    Web Price $237.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    6KJ83
    Mfr. Model #
    1060834
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $315.50 / each
  • Brass/Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    30VZ82
    Mfr. Model #
    740FG-M1A-275
    Brass/Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $426.00 / each
  • Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    3EEX8
    Mfr. Model #
    1740203
    Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $29.70 / each
  • Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    3EEY4
    Mfr. Model #
    13213B15
    Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $153.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X179
    Mfr. Model #
    3/4 174A-050
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $76.75 / each
  • Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    3EEY5
    Mfr. Model #
    13214B15
    Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $215.00 / each
  • Lead Free Copper Silicon Alloy Vacuum Relief Valve, MNPT Inlet Type, MNPT Outlet Type

    Brand
    WATTS
    Item #
    29YL72
    Mfr. Model #
    LFN36-M1-3/4"
    Lead Free Copper Silicon Alloy Vacuum Relief Valve, MNPT&#x
    Web Price $39.80 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X181
    Mfr. Model #
    3/4 174A-100
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $78.00 / each
  • Bronze Vacuum Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    CASH ACME
    Item #
    31LC84
    Mfr. Model #
    22398-0000LF
    Bronze Vacuum Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $26.80 / each
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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More