About Backflow-Prevention Valves
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Flange-Mount Check Valves
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Disc Material: Bronze
- Seal Material: Buna-N Rubber
Sandwich these valves between two ANSI flanges for backflow prevention at a fraction of the weight of flanged check valves and a reduced pipeline footprint. ANSI flanges are sold separately. All valves 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.
| Pipe Size  | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | For Flange Class | Each | |
Cast Iron Body | ||||||||
|---|---|---|---|---|---|---|---|---|
Flanged × Flanged | ||||||||
| 10 | 2,400 | 200 psi @ 70° F | 1.25 | -20° to 250° | 4 1/4" | 125 | 0000000 | 0000000 |
Drain Valves for Thick Liquids
- Valve Type: Globe
- For Use With: Water, Thick Liquids
Empty mud, sludge, and water from tanks, reservoirs, and basins. First designed for use on settling tanks in water treatment plants, these stainless steel drain valves won't corrode from washdowns and long-term exposure to waste. They install flush with the bottom of large vessels. Lift them up for drainage using a valve wrench or position indicator.
Bolts | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pressure Class | Flange OD | Circle Dia. | No. of Holes | Hole Dia. | Included | Temp. Range, °F | Wd. | Ht. | Stem Type | Drive Style | Drive Size | Each | |
316 Stainless Steel Body and Disc | ||||||||||||||
| 10 | 125 | 16" | 14 1/4" | 12 | 1" | No | 35° to 125° | 16 1/2" | 23 7/8" | Nonrising | External Square | 2" | 0000000 | 000000000 |