| 摘要 |
An improved method and apparatus for a valve assembly features a valve body, a first seat ring mounted in the valve body, a second seat ring mounted in the valve body, and a retractable blade gate slideable in between the first seat ring and the second seat ring. The gate is moveable between open and closed position. A first elastomeric ring is disposed in between the valve body and the first seal ring and projecting towards the gate blade. A second elastomeric ring is disposed in between the second seat ring and the valve body and projecting towards the gate blade.
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