发明名称 |
Emergency shutdown test system |
摘要 |
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. |
申请公布号 |
AU3505100(A) |
申请公布日期 |
2000.09.21 |
申请号 |
AU20000035051 |
申请日期 |
2000.02.28 |
申请人 |
FISHER CONTROLS INTERNATIONAL INC. |
发明人 |
BRUCE F. GRUMSTRUP;STEPHEN G. SEBERGER |
分类号 |
F16K17/36;F16K31/124;F16K37/00;G05B9/02;G05B23/02 |
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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