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    7 Products

    Threaded Check Valves for Vacuum

    Prevent vacuum loss with these airtight, leakproof valves. They open to allow flow in one direction and close when flow stops or reverses.
    Anodized Aluminum Body
    Image of Product. Front orientation. Check Valves. Threaded Check Valves for Vacuum.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Vacuum Rating,
    in. Hg
    For Use
    With
    Ball
    Material
    Spring
    Material
    Seal
    Material
    Each
    NPT Female Inlet × NPT Female Outlet
    1/4 1.15230 psi @ 200° F0.280 to 2001 3/8"Any Angle, Horizontal, Vertical0.58AirAcetal
    		Stainless Steel
    		Buna-N
    		1878N1000000
    3/8 4.7230 psi @ 200° F0.30 to 2002 1/8"Any Angle, Horizontal, Vertical0.6AirAcetal
    		Stainless Steel
    		Buna-N
    		1878N200000
    1/2 4.7230 psi @ 200° F0.30 to 2002 1/8"Any Angle, Horizontal, Vertical0.6AirAcetal
    		Stainless Steel
    		Buna-N
    		1878N500000
    1 1/4 28230 psi @ 200° F0.070 to 2003 3/8"Any Angle, Horizontal, Vertical0.14AirAcetal
    		Stainless Steel
    		Buna-N
    		1878N300000
    263230 psi @ 200° F0.170 to 2005"Any Angle, Horizontal, Vertical0.35AirAcetal
    		Stainless Steel
    		Buna-N
    		1878N4000000
     

    Check Valves with Barbed Fittings for Vacuum

    Image of Product. Front orientation. Check Valves. Check Valves with Barbed Fittings for Vacuum.
    Barbs grip onto tubing, providing a secure hold to prevent vacuum loss in tubing lines. These valves open to allow flow in one direction and close when flow stops or reverses.
    For Tube ID
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Vacuum Rating,
    in. Hg
    For Use
    With
    Disc
    Material
    Seal
    Material
    Each
    Polyethylene Body
     
    Barbed × Barbed
    1/4", 5/16" 20 psi @ 150° F35 to 150White2 3/4"29.9Air, WaterNeoprene
    		Polyethylene4610K1300000
    3/8", 7/16", 1/2" 20 psi @ 150° F35 to 150White3 3/16"29.9Air, WaterNeoprene
    		Polyethylene4610K170000
     
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