VALVE

  High Performance Butterfly Valves  use a disc offset from the seat center, hence the name Double Offset. In this configuration, the disc is eccentric, or offset, from the valve seat. As the disc starts to rotate, it moves away from the seat instead of across it. This design actually uses the line pressure to help give it its seal. This feature allows the use of offset butterfly valves in high‐pressure applications such as ethanol or HVAC. It generally uses PTFE or plastic as its seat material, but metal seats are also available to meet fire‐testing specifications like API 607. Offset Disc Butterfly Valves are comprised of the following components: Body Retainer Plate Seat Disc Stem Stem Seals Standard double offset butterfly valves come with a polymer seat, usually PTFE, with a metal backup for fire safety. Metal‐to‐metal seats are also available and may provide a higher sealing quality, and allow slightly higher temperatures. FEIDA VALVE is the top ranking  China double offset butte