写实素描专利名称：Partial stroke testing system
发明人：Tareq Nasr Albuaijan
申请号：US09779661柴胡疏肝散加减
宽容英语
申请日：20010209辣椒肉馅的做法
公开号：US06435022B1
公开日：
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20020820
专利内容由知识产权出版社提供
香精怎么用专利附图：
摘要：A partial stroke testing system for online testing of emergency shut-off valve,said system is de
signed for implementation on an emergency shut-off valve with a main solenoid with manual ret, main solenoid valve, quick exhaust valve and a pneumatic回执单模板
actuator connected to a source of pressurized air supply for opening and closing the said emergency shut-off valve and the said shut-off valve normally movable between a fully open and fully clod position. The system also include control means programmed into the plant emergency shutdown system controller for initiating electrical signal for
initiating a test and for enhancing the bleed rate from the said pneumatic actuator in the event of a emergency trip signal. Test means for testing the said emergency shut-off
valve without fully closing the emergency shut-off valve in respon to signal from the said control means is included in the system. The said test means, controlled by the said control means, include a cond solenoid and a cond solenoid valve for bleeding off pressurized air to thereby move the said emergency shut-off valve from full opened position to partially clod position. Means for limiting the movement of said emergency shut-off valve to a partially clod position becau of the bleeding of pressurized air is included in the system. The system also includes an isolation valve for isolating the said test means for maintenance purpo.
申请人：ALBUAIJAN TAREQ NASSER
温暖作文代理机构：Dennison, Schultz & Dougherty
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