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About Backflow-Prevention Valves
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Flanged Check Valves
- For Use With: Air, Steam, Water
- Disc Material:
Pipe Size 4 and smaller: Bronze
Pipe Size 5 and larger: Iron - Seal Material: Bronze
Bolt these valves to ANSI flanges. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.
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) | Pressure Class | Max. Pressure | Max. Steam Pressure | Min. Opening Pressure | Temperature Range, °F | End-to-End Lg. | Flange OD | No. of Bolt Holes | Bolt Hole Size | Bolt Circle Dia. | Bolts Included | Includes | Each | |
Cast Iron Body | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flanged × Flanged | |||||||||||||||
| 2 | 110 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 8" | 6" | 4 | 5/8" | 4 3/4" | No | Removable Cap | 0000000 | 0000000 |
| 2 1/2 | 193 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 8 1/2" | 7" | 4 | 5/8" | 5 1/2" | No | Removable Cap | 0000000 | 000000 |
| 3 | 292 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 9 1/2" | 7 1/2" | 4 | 5/8" | 6" | No | Removable Cap | 0000000 | 000000 |
| 4 | 468 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 11 1/2" | 9" | 8 | 5/8" | 7 1/2" | No | Removable Cap | 0000000 | 000000 |
| 5 | 735 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 13" | 10" | 8 | 3/4" | 8 1/2" | No | Removable Cap | 0000000 | 00000000 |
| 6 | 1,060 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 14" | 11" | 8 | 3/4" | 9 1/2" | No | Removable Cap | 0000000 | 00000000 |
| 8 | 1,880 | 125 | 200 psi @ 70° F | 125 psi @ 353° F | 1 psi | -20° to 405° | 19 1/2" | 13 1/2" | 8 | 3/4" | 11 3/4" | No | Removable Cap | 0000000 | 00000000 |