Butterfly Valve Body Construction
Butterfly valve body construction varies. The most economical is the wafer type that fits between two pipeline flanges. Another type, the lug wafer design, is held in place between two pipe flanges by bolts that join the two flanges and pass through holes in the valve's outer casing.
Butterfly valves are available with conventional flanged ends for bolting to pipe flanges, and in a threaded end construction.
