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About Backflow-Prevention Valves
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Check Valves for Refrigerant
- Spring Material: Stainless Steel
- Seal Material: Neoprene Rubber
- Ball Material: Stainless Steel
- For Use With: Refrigerant
Use these valves in refrigeration and air-conditioning systems. All open to allow flow in one direction and close when flow stops or reverses. They solder to copper tubing for a permanent, leak-tight connection.
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 Copper Tube Size  | For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Copper Body | ||||||||
|---|---|---|---|---|---|---|---|---|
Solder Connect × Solder Connect | ||||||||
| 1/4 | 3/8" | 1.2 | 755 psi @ 300° F | 1 | -40° to 300° | 3 3/4" | 0000000 | 000000 |
| 3/8 | 1/2" | 2.2 | 755 psi @ 300° F | 1 | -40° to 300° | 3 3/4" | 0000000 | 00000 |
| 3/4 | 7/8" | 7.5 | 755 psi @ 300° F | 1 | -40° to 300° | 4 1/2" | 0000000 | 00000 |
| 1 | 1 1/8" | 12.4 | 755 psi @ 300° F | 1 | -40° to 300° | 5" | 0000000 | 000000 |