发明名称 |
Fully independent, redundant fluid energized sealing solution with secondary containment |
摘要 |
A redundant sealing system with secondary containment for preventing leakage of fluid along a valve shaft is provided. The system comprises a first set of dynamic seals, a second set of dynamic seals, an auxiliary barrier fluid chamber, and a barrier fluid indicator. The first and second set of dynamic seals are in spaced relation to each other a distance equal to or further than a maximum stroke length of an actuatable valve stem. The auxiliary barrier fluid chamber is interposed between the first and second sets of dynamic seals. The barrier fluid indicator has a piston in a primary barrier fluid chamber. A first face of the piston is exposed to the auxiliary barrier fluid chamber. A second face of the piston is exposed to a barrier fluid and inhibited from fluid communication with the auxiliary barrier fluid chamber by a dynamic seal in the first set of dynamic seals.
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申请公布号 |
US7426936(B2) |
申请公布日期 |
2008.09.23 |
申请号 |
US20060366299 |
申请日期 |
2006.03.02 |
申请人 |
WOODWARD GOVERNOR COMPANY |
发明人 |
GESSAMAN JEFF A;STUMBO STEVEN CHARLES;GREEB KEVIN E.;BURDICK WADE A. |
分类号 |
F16J9/00 |
主分类号 |
F16J9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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