McMaster-Carr logo
    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)
    21 Products

    Threaded Check Valves

    These valves open to allow flow in one direction and close when flow stops or reverses.
    Connectors, BSPP Female Inlet × BSPP Female Outlet
    Image of Product. Female Inlet × Female Outlet. Front orientation. Contains Annotated. Female. Threaded Check Valves, Female.
    Image of Specification. Flared Angle Connector. Front orientation. Contains Annotated. Connector Fitting. Threaded Check Valves.

    Female Inlet × Female

    Outlet

    Flared Angle Connector

    316 Stainless Steel Body—316 stainless steel valves have the best corrosion resistance.
    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.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Spring Material
    Seal Material
    End-to-End
    Lg.
    For Use With
    Each
    Brass Body—Buna-N Spring-Loaded Piston
    3/8
    		2400 psi @ 70° F—235 to 225302 Stainless Steel
    		Buna-N
    		2 5/8"Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon7746K221000000
    1/2
    		4400 psi @ 70° F—235 to 225302 Stainless Steel
    		Buna-N
    		2 11/16"Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon7746K22200000
    3/4
    		6400 psi @ 70° F—235 to 225302 Stainless Steel
    		Buna-N
    		3 5/16"Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon7746K22300000
    1
    		13400 psi @ 70° F—235 to 225302 Stainless Steel
    		Buna-N
    		3 11/16"Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon7746K22400000
     
    316 Stainless Steel Body—Fluoroelastomer Spring-Loaded Piston
    1/4
    		1.13,000 psi @ 70° F—2-5 to 350316 Stainless Steel
    		Fluoroelastomer
    		2 5/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon1874N3200000
    3/8
    		3.13,000 psi @ 70° F—2-5 to 350316 Stainless Steel
    		Fluoroelastomer
    		2 5/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon1874N3400000
    1/2
    		3.83,000 psi @ 70° F—2-5 to 350316 Stainless Steel
    		Fluoroelastomer
    		2 5/8"Air, Argon, Helium, Krypton, Neon, Water, Xenon1874N3600000
    3/4
    		7.43,000 psi @ 70° F—2-5 to 350316 Stainless Steel
    		Fluoroelastomer
    		3 5/16"Air, Argon, Helium, Krypton, Neon, Water, Xenon1874N3800000
    1
    		11.23,000 psi @ 70° F—2-5 to 350316 Stainless Steel
    		Fluoroelastomer
    		3 11/16"Air, Argon, Helium, Krypton, Neon, Water, Xenon1874N4100000
     
    316 Stainless Steel Body—316 Stainless Steel Spring-Loaded Piston
    1/8
    		1.85580 psi @ 350° F150 psi @ 212° F40 to 355302 Stainless Steel
    		Fluoroelastomer
    		2"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon1958N11000000
    1/4
    		1.954580 psi @ 350° F150 psi @ 212° F40 to 355302 Stainless Steel
    		Fluoroelastomer
    		2"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon1958N12000000
    3/8
    		3.48580 psi @ 350° F150 psi @ 212° F40 to 355302 Stainless Steel
    		Fluoroelastomer
    		2 5/8"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon1958N13000000
    1/2
    		3.584580 psi @ 350° F150 psi @ 212° F40 to 355302 Stainless Steel
    		Fluoroelastomer
    		2 13/16"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon1958N14000000
    3/4
    		6.463580 psi @ 350° F150 psi @ 212° F40 to 355302 Stainless Steel
    		Fluoroelastomer
    		3 5/16"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon1958N15000000
    1
    		9.088580 psi @ 350° F150 psi @ 212° F40 to 355302 Stainless Steel
    		Fluoroelastomer
    		3 9/16"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon1958N16000000
     

    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.
    PVC 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

    PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.
    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
    BSPP Female × BSPP Female
    1/2 6.3150 psi @ 70° F140 to 140Dark Gray4 1/4"Horizontal, VerticalASTM D1784Butane, Kerosene, Liquid Carbon Dioxide, Natural Gas, Nitric Acid, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, WaterPVC
    		Fluoroelastomer
    		7909K910000000
    1 25150 psi @ 70° F140 to 140Dark Gray5 3/16"Horizontal, VerticalASTM D1784Butane, Kerosene, Liquid Carbon Dioxide, Natural Gas, Nitric Acid, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, WaterPVC
    		Fluoroelastomer
    		7909K93000000
     

    Inline Hydraulic Check Valves

    Hydraulic check valves open to allow flow in one direction and close when flow stops or reverses.
    BSPP Female Inlet × BSPP Female Outlet—Ball Check Valve
    Image of Product. Front orientation. Hydraulic Check Valves. Inline Hydraulic Check Valves, BSPP Female Inlet × BSPP Female Outlet—Ball Check Valve.
    Inlet
    Connection
    Outlet
    Connection
    Pipe
    Size
    Dash
    Size
    Pipe
    Size
    Dash
    Size
    Max. Flow
    Rate, gpm
    Flow Coefficient
    (Cv)
    Max. Pressure,
    psi
    Min. Opening
    Pressure, psi
    Port-to-Port
    Lg.
    Hex
    Wd.
    Mounting
    Position
    Temp. Range,
    ° F
    Each
    Steel Body
    1/4
    		041/4
    		0461.475,0002.52"3/4"Any Angle-30 to 2001744N5000000
    3/8
    		063/8
    		06103.35,0002.52 1/2"1"Any Angle-30 to 2001744N600000
    1/2
    		081/2
    		08123.65,0002.52 7/8"1 1/8"Any Angle-30 to 2001744N700000
    3/4
    		123/4
    		12205.415,0002.53 1/4"1 3/8"Any Angle-30 to 2001744N800000
     
    back to top