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TRIPLE OFFSET TYPE TRIPLE OFFSET DESIGN PRINCIPLES
Triple offset metal seat butterfly valve provide a bi-directional and bubble-tight shutoff which is attributed to the geometry of triple offset seat.
The valve stem is offset by seat (1st offset) and the valve seat surface center line is offset against the center line of pipe (2nd offset) and the conical axis is offset by valve center line (3rd offset: inclined cone). The 3rd offset completely eliminates rubbing. CHARACTERISTICS AND MERITS
- Excellent durability of seat part and low operating torque by non-rubbing characteristics with triple offset construction. DESIGN FEATURE
- Designed in accordance with ASME B 16.34 or other customer requirements. BODY
- The valve body shall be one piece cast or fabrication. BODY SEAT
- The valve seat shall be integrated with the body. DISC
- The valve disc shall be the same material as the valve body. It is supported by laminated seal ring, which is kept in place by seat retainer ring bolted to the disc and can be replaced easily. STEM
- The packing shall be consist of two braided rings in the top and bottom of valve and three dieformed graphite rings in the middle. ACTUATORS
- All valve shall be self-locking manual gear operation type which is served as standard. |