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About Backflow-Prevention Valves
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High-Cycling Check Valves
Barbed Male Inlet × Barbed Male Outlet
Unthreaded Male Inlet x Unthreaded Male Outlet
NPT Male Inlet × Barbed Male Outlet
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.
Polycarbonate valves are clear so you can monitor your line.
Nylon Plastic Body
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
| Pipe Size  | For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Barbed Male Inlet × Barbed Male Outlet | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| __ | 1/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 1/4" | 000000000 | 00000 |
| __ | 3/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 11/16" | 00000000 | 0000 |
| __ | 3/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 11/16" | 00000000 | 0000 |
| __ | 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 00000000 | 0000 |
| __ | 5/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 00000000 | 0000 |
| __ | 3/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 9/16" | 000000000 | 0000 |
| __ | 3/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 7/8" | 000000000 | 000 |
Unthreaded Male Inlet × Unthreaded Male Outlet | ||||||||||
| __ | 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 5/8" | 00000000 | 0000 |
NPT Male Inlet × Barbed Male Outlet | ||||||||||
| 1/8 | 1/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 3/8" | 0000000 | 0000 |
| 1/8 | 3/16" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 9/16" | 0000000 | 0000 |
| 1/8 | 3/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 5/8" | 0000000 | 0000 |
Polypropylene Plastic Body
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
| Pipe Size | For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Barbed Male Inlet × Barbed Male Outlet | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| __ | 1/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 1/4" | 000000000 | 00000 |
| __ | 3/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | White | 1 11/16" | 00000000 | 0000 |
| __ | 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 9/16" | 00000000 | 0000 |
| __ | 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 000000000 | 0000 |
| __ | 5/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 3/4" | 00000000 | 0000 |
| __ | 3/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 000000000 | 0000 |
| __ | 3/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 7/8" | 000000000 | 0000 |
Unthreaded Male Inlet × Unthreaded Male Outlet | ||||||||||
| __ | 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | White | 1 5/8" | 00000000 | 0000 |
| __ | 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 5/8" | 000000000 | 0000 |
NPT Male Inlet × Barbed Male Outlet | ||||||||||
| 1/8 | 1/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 3/8" | 000000000 | 0000 |
| 1/8 | 3/16" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 1/2" | 000000000 | 0000 |
| 1/8 | 1/4" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 1/2" | 000000000 | 0000 |
| 1/8 | 3/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 5/8" | 000000000 | 0000 |
Polycarbonate Plastic Body
- For Use With: Air, Water
- Diaphragm Material: Silicone Rubber
- Seal Material: Silicone Rubber
| Pipe Size | For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Barbed Male Inlet × Barbed Male Outlet | ||||||||
|---|---|---|---|---|---|---|---|---|
| __ | 1/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/4" | 000000000 | 00000 |
| __ | 3/16" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 11/16" | 000000000 | 0000 |
| __ | 1/4" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 5/8" | 000000000 | 000 |
| __ | 3/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 15/16" | 000000000 | 0000 |
NPT Male Inlet × Barbed Male Outlet | ||||||||
| 1/8 | 1/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 3/8" | 000000000 | 0000 |
| 1/8 | 3/16" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/2" | 000000000 | 0000 |
| 1/8 | 1/4" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/2" | 000000000 | 0000 |
| 1/8 | 3/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 5/8" | 000000000 | 0000 |
Check Valves with Quick-Turn Fittings
Female Inlet × Female Outlet
Female Inlet × Male Outlet
Male Inlet × Male Outlet
Male Inlet × Female Outlet
- For Use With: Air, Water
- Diaphragm Material: Silicone Rubber
- Seal Material: Silicone Rubber
Also known as luer lock couplings, quick-turn fittings consist of a plug and a socket that connect with a half turn, so you can easily connect and disconnect your line. These valves open to allow flow in one direction and close when flow stops or reverses. The clear body allows you to visually inspect flow and debris accumulation.
| Gender | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Polycarbonate Plastic Body | |||||||
|---|---|---|---|---|---|---|---|
Quick-Turn | |||||||
| Female Inlet × Female Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1" | 000000 | 00000 |
| Female Inlet × Male Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/4" | 000000 | 0000 |
| Male Inlet × Male Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/2" | 000000 | 0000 |
| Male Inlet × Female Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/4" | 000000 | 0000 |
Check Valves with Barbed Fittings for Harsh Chemicals
Diaphragm Check Valve
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.
PVDF valve resists abrasion and UV light.
PVDF Plastic Body—Diaphragm
- For Use With: Air, Butane, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Gasoline, Hydrochloric Acid, Nitric Acid, Oil, Propane, Salt Water, Soap Solutions, Sodium Hypochlorite, Sulfuric Acid, 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 | |
Barbed × Barbed | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | White | 1 21/32" | 00000000 | 00000 |