You’ll find the valve body between the pipe flanges as it holds the valve components in place. The valve body material is metal and made from either carbon steel, stainless steel, titanium alloy, nickel alloy, or aluminum bronze. All but carbon stell are appropriate for corrosive environments.
The body for a butterfly control valve is typically either a lug type, a wafer type, or double flanged.
- Lug
- Protruding lugs that have bolt holes to match with those in the pipe flange.
- Allows dead-end service or downstream piping removal.
- Threaded bolts around the entire area make it a safer option.
- Offers end-of-line service.
- Weaker threads mean lower torque ratings
- Wafer
- Without protruding lugs and instead is sandwiched between the pipe flanges with flange bolts surrounding the body. Features two or more centering holes to help with installation.
- Does not transfer the weight of the piping system through the valve body directly.
- Lighter and cheaper.
- Wafer designs do not transfer the weight of the piping system directly through the valve body.
- Cannot be used as a pipe end.
- Double flanged
- Complete flanges on both ends to connect with the pipe flanges (flange face on both sides of the valve).
- Popular for large size valves.
Post time: Feb-14-2022