| 摘要 |
Apparatus for testing an emergency valve in which a valve member ( 10 ) is movable by fluid-operated actuator ( 11 ) between a normal (open or closed) position and an emergency position (closed or open respectively). The apparatus comprises partial stroking means including means ( 32, 23, 22 to 13 ) for initiating emergency movement of the valve from its normal towards its emergency position, and means ( 13, 14 ) for returning it from a predetermined position intermediate the normal and emergency positions at its normal operating speed. The apparatus includes means for detecting the loss of the controlling electrical signal to the valve and a means ( 51 ) for detecting the correct operation of the valve and its associated operating components by measuring the pressure of fluid being released from or being applied to the actuator ( 11 ).
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