About Backflow-Prevention Valves
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High-Pressure Threaded Check Valves
These valves are rated for up to twice the pressure of standard check valves. They open to allow flow in one direction and close when flow stops or reverses.
316 stainless steel valves are more corrosion resistant than brass valves.
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.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Ball Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Buna-N Rubber
Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
NPT Female Inlet × NPT Female Outlet | |||||||
|---|---|---|---|---|---|---|---|
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 000000 |
| 3/8 | 1.4 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 00000 |
| 1/2 | 2.1 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
NPT Female Inlet × NPT Male Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 3/8 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 1/2 | 2.4 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
NPT Male Inlet × NPT Male Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 3/8 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 1/2 | 2.4 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
NPT Male Inlet × NPT Female Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 00000 |
| 3/8 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 00000 |
| 1/2 | 2.4 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Piston Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Fluoroelastomer Rubber
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
NPT Female Inlet × NPT Female Outlet | |||||||
|---|---|---|---|---|---|---|---|
| 1/8 | 0.1 | 3,000 psi @ 70° F | 0.33 | -5° to 350° | 1 3/4" | 0000000 | 000000 |
| 1/4 | 0.47 | 3,000 psi @ 70° F | 0.33 | -5° to 350° | 2 1/8" | 0000000 | 00000 |
| 3/8 | 1.47 | 3,000 psi @ 70° F | 0.33 | -5° to 350° | 2 1/16" | 0000000 | 000000 |
| 1/2 | 1.68 | 3,000 psi @ 70° F | 0.33 | -5° to 350° | 3 1/16" | 0000000 | 000000 |
| 3/4 | 4.48 | 2,000 psi @ 70° F | 0.33 | -5° to 350° | 3 3/8" | 0000000 | 000000 |
| 1 | 4.48 | 2,000 psi @ 70° F | 0.33 | -5° to 350° | 4 1/4" | 0000000 | 000000 |
High-Pressure Threaded Check Valves for Oil and Fuel
- For Use With: Diesel Fuel, Gasoline, Oil
- Ball Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Fluoroelastomer Rubber
Rated for at least four times the pressure of standard check valves for oil and fuel, these are often used in hydraulic applications. They open to allow flow in one direction and close when flow stops or reverses.
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.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Brass Body | |||||||
|---|---|---|---|---|---|---|---|
NPT Female Inlet × NPT Female Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 000000 |
| 3/8 | 1.4 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 00000 |
| 1/2 | 2.1 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
NPT Female Inlet × NPT Male Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 3/8 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 1/2 | 2.4 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
NPT Male Inlet × NPT Male Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 3/8 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 11/16" | 0000000 | 00000 |
| 1/2 | 2.4 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |
NPT Male Inlet × NPT Female Outlet | |||||||
| 1/4 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 00000 |
| 3/8 | 1.1 | 3,000 psi @ 70° F | 1 | -20° to 180° | 2 9/16" | 0000000 | 00000 |
| 1/2 | 2.4 | 2,000 psi @ 70° F | 1 | -20° to 180° | 3 3/16" | 0000000 | 000000 |