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    44 Products

    Threaded Precision Flow-Adjustment Valves

    Also known as needle valves, these adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. Turn the handle to adjust flow. All valves have metal-to-metal seats that resist temperature fluctuations.
    NPTF Female × NPTF Female
    Image of Product. Locking T-Handle. Front orientation. Flow-Adjustment Valves. Threaded Precision Flow-Adjustment Valves, NPTF Thread, Female, 316 Stainless Steel Body with Locking T-Handle and Internal Check Valve.
    Image of Product. Front orientation. Flow-Adjustment Valves. Threaded Precision Flow-Adjustment Valves, NPTF Thread, Female, Knob Handle, Locking Handle.
    Image of Product. Front orientation. Flow-Adjustment Valves. Threaded Precision Flow-Adjustment Valves, NPTF Thread, Female, Knob Handle, Locking Handle, Internal Check Valve.

    Locking T-Handle

    Locking Handle

    Knob Handle

    Internal Check

    Valve, Locking

    Handle, Knob

    Handle

    303 Stainless Steel Body—303 stainless steel valves are more corrosion resistant than brass and steel valves.
    316 Stainless Steel Body—316 stainless steel valves have the best corrosion resistance.
    Locking Handle—Locking handles have a nut to prevent accidental flow adjustment.
    Internal Check Valve—Internal check valves actuate when the pressure changes to stop flow from the controlled direction and allow free flow in the opposite direction. Valves with an internal check valve are often used to control the speed of air cylinders and air-powered motors.
    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.
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Valve
    Type
    For Use With
    Seal Material
    Each
    Brass Body with Locking Knob Handle
    1/8 0.22,000 psi @ 400° F-15 to 4001 1/2"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    1/4 0.432,000 psi @ 400° F-15 to 4002"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/8 0.782,000 psi @ 400° F-15 to 4002 1/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/2 1.242,000 psi @ 400° F-15 to 4002 11/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/4 1.932,000 psi @ 400° F-15 to 4002 15/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
     
    Brass Body with Locking Knob Handle and Internal Check Valve
    1/8 0.232,000 psi @ 400° F-15 to 4001 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/4 0.542,000 psi @ 400° F-15 to 4002 3/8"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/8 0.832,000 psi @ 400° F-15 to 4002 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/2 1.472,000 psi @ 400° F-15 to 4003 3/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/4 1.92,000 psi @ 400° F-15 to 4003 9/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
     
    Steel Body with Locking Knob Handle
    1/8 0.25,000 psi @ 400° F-15 to 4001 1/2"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/4 0.435,000 psi @ 400° F-15 to 4002"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/8 0.785,000 psi @ 400° F-15 to 4002 1/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/2 1.245,000 psi @ 400° F-15 to 4002 11/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
     
    Steel Body with Locking Knob Handle and Internal Check Valve
    1/8 0.235,000 psi @ 400° F-15 to 4001 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/4 0.545,000 psi @ 400° F-15 to 4002 3/8"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/8 0.835,000 psi @ 400° F-15 to 4002 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    1/2 1.475,000 psi @ 400° F-15 to 4003 3/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/4 1.95,000 psi @ 400° F-15 to 4003 9/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
     
    303 Stainless Steel Body with Locking Knob Handle
    1/8 0.25,000 psi @ 400° F-15 to 4001 1/2"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    1/4 0.435,000 psi @ 400° F-15 to 4002"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    3/8 0.785,000 psi @ 400° F-15 to 4002 1/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    1/2 1.245,000 psi @ 400° F-15 to 4002 11/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
     
    303 Stainless Steel Body with Locking Knob Handle and Internal Check Valve
    1/8 0.235,000 psi @ 400° F-15 to 4001 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    1/4 0.545,000 psi @ 400° F-15 to 4002 3/8"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    3/8 0.835,000 psi @ 400° F-15 to 4002 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
     
    316 Stainless Steel Body with Locking T-Handle and Internal Check Valve
    1/2 1.475,000 psi @ 400° F-15 to 4003 3/16"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
     
    BSPT Female × BSPT Female
    Image of Product. Front orientation. Flow-Adjustment Valves. Threaded Precision Flow-Adjustment Valves, BSPT Thread, Female.
    Locking Handle—Locking handles have a nut to prevent accidental flow adjustment.
    Internal Check Valve—Internal check valves actuate when the pressure changes to stop flow from the controlled direction and allow free flow in the opposite direction. Valves with an internal check valve are often used to control the speed of air cylinders and air-powered motors.
    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.
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Valve
    Type
    For Use With
    Seal Material
    Each
    Brass Body with Locking Knob Handle
    1/8 0.22,000 psi @ 400° F-15 to 4001 1/2"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic0000000000000
    1/4 0.432,000 psi @ 400° F-15 to 4002"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/8 0.782,000 psi @ 400° F-15 to 4002 1/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
     
    Brass Body with Locking Knob Handle and Internal Check Valve
    1/4 0.542,000 psi @ 400° F-15 to 4002 3/8"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
    3/8 0.832,000 psi @ 400° F-15 to 4002 3/4"NeedleWater, Oil, Air, Argon, Helium, Krypton, Neon, XenonFluoroelastomer/PTFE Plastic000000000000
     

    Easy-Set Plastic Threaded Precision Flow-Adjustment Valves

    To ensure consistent and repeatable settings, these valves have color-coded handle threads and numerical markings. One full revolution of the handle reveals a new color to indicate the set point. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. The locking knob handle has a ring that prevents accidental adjustment.
    Black Glass-Filled Polyester Plastic Body
    Image of Product. Front orientation. Flow-Adjustment Valves. Easy-Set Plastic Threaded Precision Flow-Adjustment Valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
    Flow-Adjustment Valves
    Mounting Nuts
    Overall
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Ht.
    Lg.
    Temp. Range,
    ° F
    Seal
    Material
    Panel Cutout
    Dia.
    Seat
    Material
    Needle Material
    End-to-End
    Lg.
    For Use
    With
    Valve
    Type
    Each
    Each
    NPTF Female × NPTF Female
    1/8 0.26200 psi @ 200° F2 13/16"1 15/16"0 to 200Buna-N
    		1"PolypropyleneZinc-Plated Steel1 15/16"Air, OxygenNeedle0000000000000000000000000
    1/4 0.48200 psi @ 200° F2 13/16"1 15/16"0 to 200Buna-N
    		1"PolypropyleneZinc-Plated Steel1 15/16"Air, OxygenNeedle00000000000000000000000
    3/8 1.06200 psi @ 200° F3 7/8"2 7/8"0 to 200Buna-N
    		1 3/8"PolypropyleneZinc-Plated Steel2 7/8"Air, OxygenNeedle00000000000000000000000
    1/2 1.35200 psi @ 200° F3 7/8"2 7/8"0 to 200Buna-N
    		1 3/8"PolypropyleneZinc-Plated Steel2 7/8"Air, OxygenNeedle00000000000000000000000
    3/4 1.96200 psi @ 200° F4 3/16"3"0 to 200Buna-N
    		1 3/8"PolypropyleneZinc-Plated Steel3"Air, OxygenNeedle00000000000000000000000
     
    Black Glass-Filled Polyester Plastic Body with Internal Check Valve
    Image of Product. Front orientation. Flow-Adjustment Valves. Easy-Set Plastic Threaded Precision Flow-Adjustment Valves.
    Internal check valves actuate when the pressure changes to stop flow control from the controlled direction and allow free flow in the opposite direction. Valves with an internal check valve are often used to control the speed of air cylinders and air-powered motors.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
    Flow-Adjustment Valves
    Mounting Nuts
    Overall
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Ht.
    Lg.
    Temp. Range,
    ° F
    Seal
    Material
    Panel Cutout
    Dia.
    Seat
    Material
    Needle Material
    End-to-End
    Lg.
    For Use
    With
    Valve
    Type
    Each
    Each
    NPTF Female × NPTF Female
    1/8 0.26200 psi @ 200° F2 13/16"1 15/16"0 to 200Buna-N
    		1"PolypropyleneZinc-Plated Steel1 15/16"Air, OxygenNeedle00000000000000000000000000
    1/4 0.48200 psi @ 200° F2 13/16"1 15/16"0 to 200Buna-N
    		1"PolypropyleneZinc-Plated Steel1 15/16"Air, OxygenNeedle000000000000000000000000
    3/8 1.06200 psi @ 200° F3 7/8"2 7/8"0 to 200Buna-N
    		1 3/8"PolypropyleneZinc-Plated Steel2 7/8"Air, OxygenNeedle000000000000000000000000
    1/2 1.35200 psi @ 200° F3 7/8"2 7/8"0 to 200Buna-N
    		1 3/8"PolypropyleneZinc-Plated Steel2 7/8"Air, OxygenNeedle000000000000000000000000
    3/4 1.96200 psi @ 200° F4 3/16"3"0 to 200Buna-N
    		1 3/8"PolypropyleneZinc-Plated Steel3"Air, OxygenNeedle0000000000000000000000000
     
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