Connection Style Connection Style | Show |
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 | Unthreaded |
Connection Style Connection Style | Hide |
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 | Threaded |
 | Barbed |
 | Flanged |
 | Socket Connect |
 | Push to Connect |
 | Threaded Union |
 | Yor-Lok |
 | Quick Clamp |
 | Solder Connect |
 | Clamp On |
 | Quick Turn |
 | Butt Weld |
| Unthreaded |
System of Measurement System of Measurement |
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For Tube ID For Tube ID |
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Body Material Body Material |
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Minimum Opening Pressure Minimum Opening Pressure |
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Maximum Pressure Maximum Pressure |
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Check Valve Type Check Valve Type |
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Shape Shape |
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 | Straight |
Valve Type Valve Type |
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|
Minimum Temperature Minimum Temperature |
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Seal Material Seal Material |
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Valve Function Valve Function |
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Flow Coefficient (Cv) Flow Coefficient (Cv) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Mounting Orientation Mounting Orientation |
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About Backflow-Prevention Valves
More
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.
Nylon valves are more impact resistant than polypropylene valves.
Polypropylene valves are more corrosion resistant than nylon valves.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
| For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Unthreaded Male Inlet × Unthreaded Male Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Off-White | 1 5/8" | 00000000 | 00000 |
- For Use With: Air, Water
- Diaphragm Material: Fluoroelastomer Rubber
- Seal Material: Fluoroelastomer Rubber
| For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Unthreaded Male Inlet × Unthreaded Male Outlet | |||||||
|---|---|---|---|---|---|---|---|
| 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | White | 1 5/8" | 00000000 | 00000 |
Vacuum-Breaking Valves
Also known as vacuum breakers, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
303 stainless steel valves have the best corrosion resistance.
Straights are often used with steam coils, heat exchangers, and space heaters.
Unthreaded
Female Outlet
- For Use With: Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon
- Seal Material: EPR Rubber
Brass Body | 303 Stainless Steel Body | |||||||
|---|---|---|---|---|---|---|---|---|
| Inlet Pipe Size | For Outlet Tube OD | Max. Pressure | Temperature Range, °F | End-to-End Lg. | Each | Each | ||
NPT Male Inlet × Unthreaded Female Outlet | ||||||||
| 1/2 | 11/16" | 300 psi @ 70° F | -20° to 365° | 1 3/4" | 0000000 | 0000000 | 0000000 | 0000000 |
| 3/4 | 13/16" | 300 psi @ 70° F | -20° to 365° | 2 1/8" | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 1 1/16" | 300 psi @ 70° F | -20° to 365° | 2 3/8" | 0000000 | 000000 | 0000000 | 000000 |