发明名称 |
EMERGENCY SHUTDOWN TEST SYSTEM |
摘要 |
<p>An emergency shutdown system for a process control system includes an emergency shutdown (ESD) valve and an associated valve actuator. An emergency shutdown (ESD) controller provides output signals to the ESD valve in the event of a failure in the process control system. A solenoid valve responds to the ESD controller to vent the actuator to a fail state. A digital valve controller (DVC) test strokes the ESD valve. An impedance booster device enables the dc powering of the solenoid valve and the DVC over a two wire line while still permitting digital communication over the same two wire line.</p> |
申请公布号 |
EP1161636(B1) |
申请公布日期 |
2003.08.13 |
申请号 |
EP20000913644 |
申请日期 |
2000.02.28 |
申请人 |
FISHER CONTROLS INTERNATIONAL, INC. |
发明人 |
GRUMSTRUP, BRUCE, F.;SEBERGER, STEPHEN, G. |
分类号 |
F16K17/36;F16K31/124;F16K37/00;G05B9/02;G05B23/02;(IPC1-7):F16K37/00 |
主分类号 |
F16K17/36 |
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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