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    44 Products

    Plastic Panel-Mount Vacuum-Regulating Valves for Air and Inert Gas

    Image of Product. Front orientation. Vacuum-Regulating Valves. Plastic Panel-Mount Vacuum-Regulating Valves for Air and Inert Gas.
    A lighter and more corrosion-resistant alternative to metal valves. All valves throttle a high vacuum source to maintain a lower vacuum level in your system. Adjust the outlet vacuum level within the range. Threads below the adjustment knob and an included panel-mount nut let you add these valves to your instrument panel. All are constant-bleed style, so they continually release small amounts of process gas to improve accuracy and repeatability.
    Inlet
    Outlet
    Pipe
    Size
    Thread
    Size
    Location
    Pipe
    Size
    Thread
    Size
    Location
    Vacuum Range,
    in. Hg
    Vacuum Adjustment
    Method
    End-to-End
    Lg.
    Bleed Type
    Panel Cutout
    Dia.
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Female
     
    Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Rubber Seal
    1/8
    		—Side1/8
    		—Side0 to 30Knob1 9/16"Constant Bleed9/16"Air, Inert Gas40 to 15041585K43000000
     
    UNF Female
     
    Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Rubber Seal
    —10-32
    		Side—10-32
    		Side0 to 30Knob1 1/8"Constant Bleed9/16"Air, Inert Gas40 to 15041585K4100000
     

    Extended-Life Vacuum-Regulating Valves for Air and Inert Gas

    Image of Product. Front orientation. Vacuum-Regulating Valves. Extended-Life Vacuum-Regulating Valves for Air and Inert Gas.
    For a longer service life than brass vacuum-regulating valves, these are made of bronze for strength and durability. They throttle a high vacuum source to maintain a lower vacuum level in your system. Turning the adjustment screw will adjust the vacuum setting.
    Inlet
    Outlet
    Pipe
    Size
    Location
    Pipe
    Size
    Location
    Vacuum Range,
    in. Hg
    Vacuum Adjustment
    Method
    End-to-End
    Lg.
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Female
     
    Bronze Body—Neoprene Diaphragm and Chrome-Plated Bronze Seal
    1/2
    		Side1/2
    		Side2 to 30Screw2 7/8"Air, Inert Gas-20 to 1804710K110000000
    3/4
    		Side3/4
    		Side2 to 30Screw2 7/8"Air, Inert Gas-20 to 1804710K13000000
    1
    		Side1
    		Side2 to 30Screw4 1/2"Air, Inert Gas-20 to 1804710K1500000000
    1 1/4
    		Side1 1/4
    		Side2 to 30Screw4 1/2"Air, Inert Gas-20 to 1804710K1700000000
    1 1/2
    		Side1 1/2
    		Side8 to 30Screw5 3/4"Air, Inert Gas-20 to 1804710K1800000000
    2
    		Side2
    		Side8 to 30Screw5 3/4"Air, Inert Gas-20 to 1804710K1900000000
     

    Adjustable Vacuum-Relief Valves for Air and Inert Gas

    Image of Product. Front orientation. Vacuum-Relief Valves. Adjustable Vacuum-Relief Valves for Air and Inert Gas.
    These valves begin opening at the set vacuum level and fully open at about 10% over the set point. They begin closing as the vacuum level drops and fully close when the system is restored below the set point. Adjust the set vacuum level within the range. Valves have a vented relief port to exhaust discharge directly.
    Inlet
    Vacuum Set Point
    Pipe
    Size
    Location
    Relief Port
    Location
    Range,
    in. Hg
    Adjustment Method
    Overall
    Ht.
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Male Inlet and Vacuum Relief Vent
     
    Brass Body—440C Stainless Steel Seal
    1/4
    		BottomTop0 to 27External Adjustment Screw1 3/4"Air, Inert Gas-15 to 25048935K2500000
     
    Brass Body—Buna-N Seal
    3/8
    		BottomTop0 to 27External Adjustment Screw2 1/16"Air, Inert Gas-15 to 25048935K3500000
    3/4
    		BottomTop0 to 27External Adjustment Screw2 5/8"Air, Inert Gas-15 to 25048935K4500000
     

    Vacuum-Regulating Valves for Air and Inert Gas

    Image of Product. Front orientation. Vacuum-Regulating Valves. Vacuum-Regulating Valves for Air and Inert Gas.
    Throttle a high vacuum source to maintain a lower vacuum level in your system. Adjust the outlet vacuum level within the range. All valves have a gauge port.
    Inlet
    Outlet
    Pipe
    Size
    Location
    Pipe
    Size
    Location
    Vacuum Range,
    in. Hg
    Vacuum Adjustment
    Method
    Vacuum Gauge
    Included
    End-to-End
    Lg.
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Female
     
    Brass Body—EPM Rubber Diaphragm and Buna-N Seal
    1/4
    		Bottom1/4
    		Side0 to 15ScrewNo1 3/4"Air, Carbon Dioxide, Inert Gas, Nitrogen-20 to 1805021K140000000
    1/4
    		Bottom1/4
    		Side10 to 30ScrewNo1 3/4"Air, Carbon Dioxide, Inert Gas, Nitrogen-20 to 1805021K24000000
     

    High-Accuracy Panel-Mount Vacuum-Regulating Valves for Air and Inert Gas

    Image of Product. Front orientation. Vacuum-Regulating Valves. High-Accuracy Panel-Mount Vacuum-Regulating Valves for Air and Inert Gas.
    For precise control over your vacuum level, these valves have ±0.1% accuracy. They throttle a high vacuum source to maintain a lower vacuum level in your system. Adjust the outlet vacuum level within the range. Valves have threads below the adjustment knob and come with a panel-mount nut. All have a gauge port. They are constant-bleed style, so they continually release small amounts of process gas to improve accuracy and repeatability.
    Inlet
    Outlet
    Pipe
    Size
    Location
    Pipe
    Size
    Location
    Vacuum Range,
    in. Hg
    Vacuum Adjustment
    Method
    Vacuum Gauge
    Included
    End-to-End
    Lg.
    Bleed Type
    Panel Cutout
    Dia.
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Female
     
    Brass Body—Buna-N Diaphragm and Buna-N Seal
    1/8
    		Side1/8
    		Side0 to 25KnobNo2 1/8"Constant Bleed1 3/8"Air, Argon, Nitrogen-40 to 1654640T710000000
    1/4
    		Side1/4
    		Side0 to 25KnobNo2 1/8"Constant Bleed1 3/8"Air, Argon, Nitrogen-40 to 1654640T72000000
     

    Vacuum Breakers for Chemicals

    A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals. Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
    Diaphragm Check Valve
    Image of Product. Front orientation. Vacuum Breakers. Vacuum Breakers for Chemicals.
    Material
    CPVC Body
    PVC Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    End-to-End
    Lg.
    Seal
    DIaphragm
    For Use With
    Temp. Range,
    ° F
    Color
    Each
    Temp. Range,
    ° F
    Color
    Each
    NPT Female Inlet × NPT Female Outlet
    1/2
    		1/2
    		80
    		Not Rated100 psi @ 75° F14 5/16"Fluoroelastomer
    		Fluoroelastomer
    		Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon40 to 180Light Gray1868N13000000040 to 140Gray1868N10000000
    3/4
    		3/4
    		80
    		Not Rated100 psi @ 75° F14 5/8"Fluoroelastomer
    		Fluoroelastomer
    		Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon40 to 180Light Gray1868N1400000040 to 140Gray1868N11000000
    1
    		1
    		80
    		Not Rated100 psi @ 75° F15 1/8"Fluoroelastomer
    		Fluoroelastomer
    		Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon40 to 180Light Gray1868N1500000040 to 140Gray1868N12000000
     
    Spring-Loaded Piston Check Valve
    Image of Product. Front orientation. Vacuum Breakers. Vacuum Breakers for Chemicals.
    Material
    CPVC Body
    PVC Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    End-to-End
    Lg.
    Seal
    Piston
    Spring
    For Use With
    Temp. Range,
    ° F
    Color
    Each
    Temp. Range,
    ° F
    Color
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2
    		1 1/2
    		80
    		Not Rated100 psi @ 75° F17 15/16"Fluoroelastomer
    		CPVC
    		PolymerBeverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon40 to 180Light Gray1868N180000000—————0
    2
    		2
    		80
    		Not Rated100 psi @ 75° F18 1/2"Fluoroelastomer
    		PVC
    		PolymerBeverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon—————040 to 140Gray1868N170000000
     

    Vacuum Breakers

    Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
    Straight
    Image of Product. Front orientation. Vacuum Breakers. Vacuum Breakers, Straight.
    Straights are often used with steam coils, heat exchangers, and space heaters.
    303 Stainless Steel Body—303 stainless steel valves have the best corrosion resistance.
    Brass Body
    303 Stainless
    Steel Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Seal
    Material
    For Use With
    Each
    Each
    NPT Male Inlet × NPT Female Outlet
    1/2
    		3/8
    		300 psi @ 70° F-20 to 3651 3/4"EPM RubberAir, Argon, Helium, Krypton, Neon, Steam, Water, Xenon4817K1400000004817K240000000
    3/4
    		1/2
    		300 psi @ 70° F-20 to 3652 1/8"EPM RubberAir, Argon, Helium, Krypton, Neon, Steam, Water, Xenon4817K150000004817K25000000
    1
    		3/4
    		300 psi @ 70° F-20 to 3652 3/8"EPM RubberAir, Argon, Helium, Krypton, Neon, Steam, Water, Xenon4817K160000004817K26000000
     

    High-Pressure Vacuum Breakers

    Image of Product. Front orientation. High-Pressure Vacuum Breakers.
    Rated for 12 times the pressure of standard vacuum-breaking valves, these can handle up to 1,500 psi. Also known as vacuum-breaking valves, they have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping. Body is 316 stainless steel for excellent 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.
    316 Stainless Steel Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    End-to-End
    Lg.
    Specs. Met
    Seal Material
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Female Inlet × NPT Male Outlet
    1/2
    		3/4
    		4.61,500 psi @ 70° F1 5/16"ASME B1.20.1Fluoroelastomer
    		Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon-10 to 4008537T740000000
    3/4
    		1
    		6.61,500 psi @ 70° F1 7/8"ASME B1.20.1Fluoroelastomer
    		Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon-10 to 4008537T76000000
     

    Compact Flange-Mount Check Valves

    Less than half the end-to-end length of standard flange-mount check valves, these can be installed between ANSI flanges in pipelines with limited clearance. ANSI flanges are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. All have a 316 stainless steel body for excellent corrosion resistance.
    316 Stainless Steel Body—Spring-Loaded Piston
    Image of System. Shown with Flanges (Not Included). Front orientation. Contains MultipleImages. Check Valves. Compact Flange-Mount Check Valves.
    Image of Product. Front orientation. Check Valves. Compact Flange-Mount Check Valves.

    Shown with Flanges (Not

    Included)

    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
    For Flange
    Class
    For Use With
    Piston Material
    Spring Material
    Seal Material
    Each
    Flanged × Flanged
    1/2 2.4720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N110000000
    3/44.4720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N12000000
    1 6.1720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N13000000
    1 1/4 12.7720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N14000000
    1 1/2 18.8720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N15000000
    232720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N16000000
    3 89720 psi @ 100° F0.5-10 to 4005/16"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N18000000
    4 144720 psi @ 100° F0.5-10 to 4003/8"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N19000000
     

    Butt-Weld Check Valves

    Weld these valves to unthreaded pipe for a smooth, flush connection that provides maximum flow. All open to allow flow in one direction and close when flow stops or reverses. They have a 316 stainless steel body for excellent corrosion resistance.
    316 Stainless Steel Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Butt-Weld Check 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
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Specs. Met
    For Use With
    Piston Material
    Spring Material
    Seal Material
    Each
    Butt Weld × Butt Weld
    1/2 40
    		2.41,500 psi @ 100° F0.5-10 to 4002 3/16"Any Angle, Horizontal, VerticalASME B16.25Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1971N110000000
    3/440
    		4.41,500 psi @ 100° F0.5-10 to 4002 11/16"Any Angle, Horizontal, VerticalASME B16.25Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1971N12000000
    1 40
    		6.11,500 psi @ 100° F0.5-10 to 4002 15/16"Any Angle, Horizontal, VerticalASME B16.25Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1971N13000000
    1 1/2 40
    		18.81,500 psi @ 100° F0.5-10 to 4003 15/16"Any Angle, Horizontal, VerticalASME B16.25Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1971N15000000
    240
    		321,500 psi @ 100° F0.5-10 to 4004 3/8"Any Angle, Horizontal, VerticalASME B16.25Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1971N16000000
     
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