A triple offset butterfly disc is designed for high pressure and high temperature. This butterfly disc has a conical sealing surface that eliminates rubbing. The stack of metal and graphite layers in a butterfly disc provides a fire‑safe seal.
A butterfly disc for steam service is made from heat‑treated stainless steel. The disc geometry of a butterfly disc allows zero leakage in both directions. A butterfly disc with an Inconel overlay resists erosion from superheated steam.
The cam action of a triple offset butterfly disc reduces operating torque. A butterfly disc with a Stellite facing withstands abrasive media. The disc edge of a butterfly disc is precision machined to a 0.1 micron finish.
A butterfly disc with a titanium body is used in desalination plants. The disc shaft of a butterfly disc is isolated from the media by bushings. A fire‑tested butterfly disc maintains sealing integrity after a fire.
Butterfly discs with a metal seat handle temperatures up to 800°C. The disc‑to‑seat contact pressure of a butterfly disc is optimized for tight shutoff. A butterfly disc with a live‑loaded stem packing reduces emissions.
The disc movement of a triple offset butterfly disc is camming and rotating. Butterfly discs for power plants are often cast from WC9 or C12A steel. The leak rate of a butterfly disc is measured in bubbles per minute. A high‑performance butterfly disc meets API 607 fire safety standards.
Comments (0)