McMaster-Carr logo
    Filter by
    Inlet Pipe Size
    Industrial Info Compare
    Fitting Connection
    Inlet Connection
    Outlet Pipe Size
    Industrial Info Compare
    For Inlet Tube OD
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    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"2745N11000000
    1/2
    		1/2
    		Not RatedNot Rated204503-15 to 4002 15/16"1"2745N1200000
    3/4
    		3/4
    		Not RatedNot Rated304503-15 to 4002 3/4"1 3/16"2745N1300000
    3/4
    		1
    		Not RatedNot Rated604503-15 to 4003 11/16"1 5/16"2745N1400000
    1
    		1
    		Not RatedNot Rated604503-15 to 4004 1/8"1 1/2"2745N1500000
    1 1/4
    		1 1/4
    		Not RatedNot Rated1304503-15 to 4004 7/16"1 7/8"2745N1600000
     
    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"2745N17000000
    3/4"3/4
    		Not RatedNot Rated304503-15 to 4003 9/16"1 1/8"2745N1800000
     
    back to top