发明名称 |
VALVE SHAFT APPARATUS FOR USE WITH ROTARY VALVES |
摘要 |
Valve shaft apparatus are described herein. An example valve shaft apparatus includes a shaft having a stationary seal and a dynamic seal spaced from the stationary seal. The stationary seal defines a first leakage detection area adjacent the stationary seal and the dynamic seal defines a second leakage detection area adjacent the dynamic seal. A seal leakage detector is integrally formed with the shaft to provide a visual indication of process fluid leakage within the first leakage detection area or within the second leakage detection area. The seal leakage detector has a passageway in fluid communication with the first leakage detection area and the second leakage detection area. The passageway has a cross-sectional profile that changes between the first and second leakage detection areas to prevent fluid from flowing from one of the leakage detection areas into a body of the fluid valve.
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申请公布号 |
US2011260086(A1) |
申请公布日期 |
2011.10.27 |
申请号 |
US20100766556 |
申请日期 |
2010.04.23 |
申请人 |
ARNOLD DAVID ANTHONY;HALM DAVID GEORGE |
发明人 |
ARNOLD DAVID ANTHONY;HALM DAVID GEORGE |
分类号 |
F16K1/22;F16K51/00 |
主分类号 |
F16K1/22 |
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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