About Flanged Flow-Adjustment Valves
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Flanged Flow-Adjustment Valves for Chemicals
With seats that can stand up to aggressive and corrosive solutions, these valves are often used in chemical-processing applications. They bolt to flanges for adjusting and regulating flow in flanged pipelines.
Lug valves can be sandwiched between two flanges or bolted directly to a single flange for servicing one end of the pipeline without depressurizing the other side. They have threaded flange holes with a hole pattern that matches ANSI flanges of the same pipe size.
Wheel handles open and close with multiple turns, providing fully adjustable flow.
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.

- Valve Type: Butterfly
- For Use With: See table
- Seat Material:
Ductile Iron Body: Fluoroelastomer Rubber
Cast Iron Body: PTFE-Lined Buna-N Rubber - Specifications Met:
Painted Ductile Iron Disc: MSS-SP-67
Ductile Iron Body—316 Stainless Steel Disc: API 609, MSS-SP-67
Pipe Size | For Use With | For Max. Shackle Dia. | Pressure Class | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Bolt Hole Size | Bolts Included | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Each | |
Cast Iron Body—316 Stainless Steel Disc | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2 | Water, Oil, Argon, Helium, Krypton, Neon, Xenon | 5/16" | 150, 125 | 6" | 4 3/4" | 4 | 3/4" | No | 159 | 150 psi @ 150° F | 10° to 150° | 1 13/16" | 000000000 | 0000000 |
2 1/2 | Water, Oil, Argon, Helium, Krypton, Neon, Xenon | 5/16" | 150, 125 | 7" | 5 1/2" | 4 | 3/4" | No | 266 | 150 psi @ 150° F | 10° to 150° | 1 15/16" | 000000000 | 000000 |
3 | Water, Oil, Argon, Helium, Krypton, Neon, Xenon | 5/16" | 150, 125 | 7 1/2" | 6" | 4 | 3/4" | No | 457 | 150 psi @ 150° F | 10° to 150° | 1 15/16" | 000000000 | 000000 |
4 | Water, Oil, Argon, Helium, Krypton, Neon, Xenon | 5/16" | 150, 125 | 9" | 7 1/2" | 8 | 3/4" | No | 860 | 150 psi @ 150° F | 10° to 150° | 2 3/16" | 000000000 | 00000000 |
6 | Water, Oil, Argon, Helium, Krypton, Neon, Xenon | 5/16" | 150, 125 | 11" | 9 1/2" | 8 | 7/8" | No | 2,020 | 150 psi @ 150° F | 10° to 150° | 2 5/16" | 000000000 | 00000000 |