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    8 Products

    Air Compressor Air Flow Check Valves

    Prevent air from escaping an air storage tank when the air compressor is not running. These valves install on the inlet of a tank. They open to allow airflow into the tank and close when flow stops or reverses direction. They have a 1/8 NPT tapped unloader port with removable plug for connecting to a pressure switch.
    NPT Female Inlet × NPT Male Outlet
    Image of Product. Front orientation. Contains Annotated. Air Flow Check Valves. Air Compressor Air Flow Check Valves, NPT Female Inlet × NPT Male Outlet.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
    Inlet Pipe
    Size
    Outlet
    Pipe Size
    Flow Coefficient
    (Cv)
    Min. Flow
    Rate
    Max. Flow
    Rate, scfm
    Max. Pressure,
    psi
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Overall
    Lg.
    Hex
    Size
    Each
    Brass Body
    3/8
    		1/2
    		Not RatedNot Rated204503-15 to 4002 11/16"7/8"0000000000000
    1/2
    		1/2
    		Not RatedNot Rated204503-15 to 4002 15/16"1"000000000000
    3/4
    		3/4
    		Not RatedNot Rated304503-15 to 4002 3/4"1 3/16"000000000000
    3/4
    		1
    		Not RatedNot Rated604503-15 to 4003 11/16"1 5/16"000000000000
    1
    		1
    		Not RatedNot Rated604503-15 to 4004 1/8"1 1/2"000000000000
    1 1/4
    		1 1/4
    		Not RatedNot Rated1304503-15 to 4004 7/16"1 7/8"000000000000
     
    Compression Inlet × NPT Male Outlet
    Image of Product. Front orientation. Contains Annotated. Air Flow Check Valves. Air Compressor Air Flow Check Valves, Compression Inlet × NPT Male Outlet.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
    For Inlet
    Tube OD
    Outlet
    Pipe Size
    Flow Coefficient
    (Cv)
    Min. Flow
    Rate
    Max. Flow
    Rate, scfm
    Max. Pressure,
    psi
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Overall
    Lg.
    Hex
    Size
    Each
    Brass Body
    1/2"1/2
    		Not RatedNot Rated204503-15 to 4002 7/8"7/8"0000000000000
    3/4"3/4
    		Not RatedNot Rated304503-15 to 4003 9/16"1 1/8"000000000000
     
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