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Actuator device schedules rate of valve closure

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    Publication date
    1 December 1966
    Publisher

    Abstract

    Prevalve actuator schedules the closure rate of a valve. The actuator is spring loaded to produce a normally open valve and pneumatically powered to close the valve. The closure rate is controlled by means of pneumatic snubber and booster circuitry

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      Last time updated on 31/05/2013