McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    41 Products

    Plastic Threaded Check Valves

    Plastic provides a lightweight alternative to metal. These valves open to allow flow in one direction and close when flow stops or reverses.
    Glass-Filled Polypropylene Body—Spring-Loaded Piston
    Image of Product. Female Inlet × Female Outlet. Front orientation. Contains Annotated. Check Valves. Plastic Threaded Check Valves, Glass-Filled Polypropylene Body—Spring-Loaded Piston, Female.

    Female Inlet × Female

    Outlet

    Glass-filled polypropylene valves are more corrosion resistant than PVC valves.
    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
    Color
    End-to-End
    Lg.
    Mounting Position
    For Use With
    Piston
    Material
    Spring Material
    Seal
    Material
    Each
    NPT Female Inlet × NPT Female Outlet
    1/4 3125 psi @ 70° F0.3335 to 140Black2"Any Angle, Horizontal, VerticalAir, Argon, Helium, Krypton, Neon, Water, XenonPolypropylene
    302 Stainless Steel
    Buna-N
    5492K11000000
    3/8 4.2125 psi @ 70° F0.3335 to 140Black2 1/16"Any Angle, Horizontal, VerticalAir, Argon, Helium, Krypton, Neon, Water, XenonPolypropylene
    302 Stainless Steel
    Buna-N
    5492K1200000
    1/2 8.1125 psi @ 70° F0.3335 to 140Black2 1/2"Any Angle, Horizontal, VerticalAir, Argon, Helium, Krypton, Neon, Water, XenonPolypropylene
    302 Stainless Steel
    Buna-N
    5492K1300000
    3/414.8125 psi @ 70° F0.3335 to 140Black2 3/4"Any Angle, Horizontal, VerticalAir, Argon, Helium, Krypton, Neon, Water, XenonPolypropylene
    302 Stainless Steel
    Buna-N
    5492K1400000
     

    Check Valves with Barbed Fittings

    Barbs grip onto tubing, providing a secure hold. These valves open to allow flow in one direction and close when flow stops or reverses.
    Polypropylene Body—Spring-Loaded Ball
    Image of Product. Barbed Male Inlet × NPT Male Outlet (Spring-Loaded Ball). Front orientation. Contains Annotated. Spring-Loaded Ball Check Valve. Check Valves with Barbed Fittings, Barbed Fitting Connection, Male, NPT Thread.
    Image of Product. Barbed Male Inlet × Barbed Male Outlet (Spring-Loaded Ball). Front orientation. Contains Annotated. Spring-Loaded Ball Check Valve. Check Valves with Barbed Fittings, Male, Barbed Fitting Connection.

    Barbed Male Inlet × NPT Male

    Outlet (Spring-Loaded Ball)

    Barbed Male Inlet ×

    Barbed Male Outlet

    (Spring-Loaded Ball)

    Polypropylene valves are more corrosion resistant than PVC or nylon valves.
    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.
    For Inlet
    Tube ID
    Pipe
    Size
    For Outlet
    Tube ID
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    For Use With
    Ball Material
    Spring Material
    Seal
    Material
    Each
    Barbed Male Inlet × NPT Male Outlet
    1/8"1/8
    Not Rated125 psi @ 70° F135 to 140White1 5/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K11400000
    1/8"1/4
    Not Rated125 psi @ 70° F135 to 140White1 13/16"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K1150000
    1/4"1/4
    Not Rated125 psi @ 70° F135 to 140White2 1/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K1190000
    5/16"1/4
    Not Rated125 psi @ 70° F135 to 140White3 3/16"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K12200000
     
    Barbed Male Inlet × Barbed Male Outlet
    1/8"1/8"0.1125 psi @ 70° F135 to 140White1 3/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K410000
    1/8"1/4"Not Rated125 psi @ 70° F135 to 140White1 11/16"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K520000
    3/16"3/16"0.2125 psi @ 70° F135 to 140White1 3/4"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K420000
    3/16"1/4"Not Rated125 psi @ 70° F135 to 140White1 7/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K570000
    1/4"1/4"0.3125 psi @ 70° F135 to 140White2 1/16"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K430000
    5/16"5/16"1125 psi @ 70° F135 to 140White3 1/2"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K6600000
    3/8"3/8"Not Rated125 psi @ 70° F135 to 140White3 1/2"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K7300000
    1/2"1/2"1125 psi @ 70° F135 to 140White3 1/2"Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    302 Stainless Steel
    Buna-N
    7757K7900000
     

    Easy-Install Threaded Check Valves for Harsh Chemicals

    To reduce installation time and allow for maintenance without detaching pipe connections, these valves have union fittings. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.
    Polypropylene Body—Ball
    Image of Product. Assembled View. Front orientation. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.
    Image of Product. Exploded View. Front orientation. Exploded view. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.

    Assembled View

    Exploded View

    Polypropylene valves are more corrosion resistant than PVC or CPVC valves.
    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
    Color
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    For Use With
    Ball
    Material
    Seal Material
    Each
    NPT Female × NPT Female
    1/2 4.8150 psi @ 70° F135 to 160White4 11/16"Horizontal, VerticalASTM D4101Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), WaterPolypropylene
    Fluoroelastomer
    4851K410000000
    3/47.7150 psi @ 70° F135 to 160White4 3/4"Horizontal, VerticalASTM D4101Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), WaterPolypropylene
    Fluoroelastomer
    4851K42000000
    1 11150 psi @ 70° F135 to 160White5 3/8"Horizontal, VerticalASTM D4101Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), WaterPolypropylene
    Fluoroelastomer
    4851K43000000
    1 1/2 45150 psi @ 70° F135 to 160White6 3/4"Horizontal, VerticalASTM D4101Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), WaterPolypropylene
    Fluoroelastomer
    4851K44000000
    2130150 psi @ 70° F135 to 160White8 1/8"Horizontal, VerticalASTM D4101Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), WaterPolypropylene
    Fluoroelastomer
    4851K45000000
     

    Plastic Threaded Check Valves for Oil and Fuel

    Plastic provides a lightweight alternative to metal. These valves open to allow flow in one direction and close when flow stops or reverses.
    Glass-Filled Polypropylene Body—Spring-Loaded Piston
    Image of Product. Connector, Female Inlet × Female Outlet. Front orientation. Contains Annotated. Black. Plastic Threaded Check Valves for Oil and Fuel, Glass-Filled Polypropylene Body, Connector Fitting.

    Connector, Female Inlet ×

    Female Outlet

    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
    Color
    End-to-End
    Lg.
    Fitting
    Type
    For Use With
    Piston
    Material
    Spring Material
    Seal Material
    Each
    NPT Female × NPT Female
    1/4 3125 psi @ 70° F0.3335 to 140Black2"ConnectorDiesel Fuel, Gasoline, OilPolypropylene
    302 Stainless Steel
    Fluoroelastomer
    5492K51000000
    3/8 4.2125 psi @ 70° F0.3335 to 140Black2 1/16"ConnectorDiesel Fuel, Gasoline, OilPolypropylene
    302 Stainless Steel
    Fluoroelastomer
    5492K5200000
    1/2 8.1125 psi @ 70° F0.3335 to 140Black2 1/2"ConnectorDiesel Fuel, Gasoline, OilPolypropylene
    302 Stainless Steel
    Fluoroelastomer
    5492K5300000
    3/414.8125 psi @ 70° F0.3335 to 140Black2 3/4"ConnectorDiesel Fuel, Gasoline, OilPolypropylene
    302 Stainless Steel
    Fluoroelastomer
    5492K5400000
     

    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.
    Polypropylene Body
    Image of Product. NPT Male Inlet × Barbed Male Outlet. Front orientation. Contains Annotated. Diaphragm Check Valve. High-Cycling Check Valves, NPT Thread, Barbed Fitting Connection, Male.
    Image of Product. Barbed Male Inlet × Barbed Male Outlet. Front orientation. Contains Annotated. Diaphragm Check Valve. High-Cycling Check Valves, Male, Barbed Fitting Connection.
    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.

    NPT Male Inlet ×

    Barbed Male Outlet

    Barbed Male Inlet ×

    Barbed Male Outlet

    Unthreaded Male Inlet

    x Unthreaded Male

    Outlet

    Polypropylene valves are more corrosion resistant than nylon valves.
    Pipe
    Size
    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
    Barbed Male Inlet × Barbed Male Outlet
    1/8" 50 psi @ 65° F0.532 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 1/4"Air, Water47245K11400000
    3/16"15 psi @ 70° F0.5-20 to 250Fluoroelastomer
    Fluoroelastomer
    White1 11/16"Air, Water47245K120000
    1/4" 15 psi @ 70° F0.5-40 to 150Fluorosilicone
    Fluorosilicone
    Black1 9/16"Air, Water47245K1390000
    1/4" 15 psi @ 70° F0.5-40 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 9/16"Air, Water47245K430000
    5/16" 15 psi @ 70° F0.5-20 to 250Fluoroelastomer
    Fluoroelastomer
    Black1 3/4"Air, Water47245K140000
    3/8" 50 psi @ 65° F0.532 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 7/8"Air, Water47245K1170000
    3/8" 15 psi @ 70° F0.5-20 to 250Fluorosilicone
    Fluorosilicone
    Black1 9/16"Air, Water47245K1320000
     
    Unthreaded Male Inlet × Unthreaded Male Outlet
    1/8" 15 psi @ 70° F0.5-20 to 250Fluoroelastomer
    Fluoroelastomer
    White1 5/8"Air, Water47245K110000
    1/8" 15 psi @ 70° F0.5-20 to 250Fluorosilicone
    Fluorosilicone
    Black1 5/8"Air, Water47245K1280000
     
    NPT Male Inlet × Barbed Male Outlet
    1/8
    1/8"50 psi @ 65° F0.532 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 3/8"Air, Water47245K1240000
    1/8
    3/16"50 psi @ 65° F0.532 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 1/2"Air, Water47245K1220000
    1/8
    1/4"50 psi @ 65° F0.532 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 1/2"Air, Water47245K1260000
    1/8
    3/8"50 psi @ 65° F0.532 to 250Fluoroelastomer
    Fluoroelastomer
    Off-White1 5/8"Air, Water47245K1190000
     

    Check Valves with Barbed Fittings for Harsh Chemicals

    Prevent backflow in chemical tubing lines. These valves have barbed fittings that grip onto tubing, providing a secure hold. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.
    Polypropylene Body—Spring-Loaded Ball
    Image of Product. Front orientation. Spring-Loaded Ball Check Valve. Check Valves with Barbed Fittings for Harsh Chemicals.
    Polypropylene valves are more corrosion resistant than nylon valves.
    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.
    Flow Coefficient
    (Cv)
    For Tube
    ID
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    For Use With
    Ball Material
    Spring Material
    Seal Material
    Each
    Barbed Male Inlet × Barbed Male Outlet
    0.11/8" 125 psi @ 70° F130 to 140White1 3/8"Any Angle, Horizontal, VerticalAcetone, Air, Argon, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Helium, Kerosene, Krypton, Mineral Spirits, Neon, Nitrogen, Oil, Propane, Salt Water, Soap Solutions, Toluene (Methylbenzene), Water, Xenon, Xylene316 Stainless Steel
    302 Stainless Steel
    Fluoroelastomer
    7757K4400000
    0.23/16"125 psi @ 70° F130 to 140White1 3/4"Any Angle, Horizontal, VerticalAcetone, Air, Argon, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Helium, Kerosene, Krypton, Mineral Spirits, Neon, Nitrogen, Oil, Propane, Salt Water, Soap Solutions, Toluene (Methylbenzene), Water, Xenon, Xylene316 Stainless Steel
    302 Stainless Steel
    Fluoroelastomer
    7757K450000
    0.31/4" 125 psi @ 70° F130 to 140White2 1/16"Any Angle, Horizontal, VerticalAcetone, Air, Argon, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Helium, Kerosene, Krypton, Mineral Spirits, Neon, Nitrogen, Oil, Propane, Salt Water, Soap Solutions, Toluene (Methylbenzene), Water, Xenon, Xylene316 Stainless Steel
    302 Stainless Steel
    Fluoroelastomer
    7757K460000
     
    back to top