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    4 Products

    Threaded Two-Stage Backflow-Prevention Valves

    Image of Product. With Unthreaded Vent, Male Inlet × Female Outlet. Front orientation. Contains Annotated. Backflow-Prevention Valves. Threaded Two-Stage Backflow-Prevention Valves, Dual Check, Male, Female.

    With Unthreaded Vent,

    Male Inlet × Female

    Outlet

    For maximum protection from system contamination, these valves have two integral check valves with a vent between them. If the primary check valve fails to close when flow stops or reverses, overflow is discharged through the vent and the secondary check valve prevents backflow.
    Chrome-Plated Brass Body—Chrome-plated brass valve is more corrosion resistant than plain brass valves.
    Unthreaded—Valve with an unthreaded vent is commonly used on laboratory faucets and other applications with intermittent flow. It discharges overflow directly and should not be installed in areas where spillage could cause water damage.
    Pipe
    Size
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Vent
    Connection
    Specs.
    Met
    Certification
    For Use
    With
    Disc
    Material
    Seal
    Material
    Each
    Chrome-Plated Brass Body—Dual Check
     
    NPT Male Inlet × NPT Female Outlet
    3/8
    		150 psi @ 140° F2535 to 1402 3/8"UnthreadedASSE 1035CSA Certified
    		Air, WaterEPDM
    		EPDM
    		4760K630000000
     

    High-Cycling Check Valves

    With internal components that resist wear from frequent operation, these valves can cycle as often as once per second. Barbed fittings and unthreaded fittings grip onto tubing, providing a secure hold. All valves open to allow flow in one direction and close when flow stops or reverses.
    Nylon Body
    Image of Product. Unthreaded Male Inlet x Unthreaded Male Outlet. Front orientation. Contains Annotated. Diaphragm Check Valve. High-Cycling Check Valves, Unthreaded Fitting Connection, Male.

    Unthreaded Male Inlet

    x Unthreaded Male

    Outlet

    Nylon valves are more impact resistant than polypropylene valves.
    For Tube
    ID
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Diaphragm
    Material
    Seal Material
    Color
    End-to-End
    Lg.
    For Use
    With
    Each
    Unthreaded Male Inlet × Unthreaded Male Outlet
    1/8" 15 psi @ 70° F0.5-20 to 250Fluorosilicone
    		Fluorosilicone
    		Black1 5/8"Air, Water47245K2500000
     
    Polypropylene Body
    Image of Product. Unthreaded Male Inlet x Unthreaded Male Outlet. Front orientation. Contains Annotated. Diaphragm Check Valve. High-Cycling Check Valves, Unthreaded Fitting Connection, Male.

    Unthreaded Male Inlet

    x Unthreaded Male

    Outlet

    Polypropylene valves are more corrosion resistant than nylon valves.
    For Tube
    ID
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Diaphragm
    Material
    Seal Material
    Color
    End-to-End
    Lg.
    For Use
    With
    Each
    Unthreaded Male Inlet × Unthreaded Male Outlet
    1/8" 15 psi @ 70° F0.5-20 to 250Fluoroelastomer
    		Fluoroelastomer
    		White1 5/8"Air, Water47245K1100000
    1/8" 15 psi @ 70° F0.5-20 to 250Fluorosilicone
    		Fluorosilicone
    		Black1 5/8"Air, Water47245K1280000
     
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