|RENCOR actuated HPBV|
There are two primary types of butterfly classifications: 1) so called "rubber lined" butterfly valves (resilient seated) which are best suited for lower pressure, lower temperature, general purpose applications, and 2) High Performance Butterfly Valves (HPBV) which are designed to ANSI pressure classifications and are suited for more robust industrial applications.
|Wafer body, rubber lined|
|Dezurik High Performance|
|Velan triple eccentric HPBV|
Butterfly valves come in three body styles; 1) wafer body, whereby the valve is "sandwiched" and held in place between two pipe flanges and are suitable for lower pressure applications; 2) lug style bodies that have threaded "lugs" cast in to the body of the valve and bolts are used to secure the valve for end of line service or keeping the valve in place when the piping is disassembled; and 3) ASME flanged butterfly valves where the valve body is in-between two ASME flanges.