| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an apparatus for exercising an emergency shutoff valve of a steam turbine and methods for operating the same.SOLUTION: A cover of a valve exerciser is mounted on top of an emergency shutoff valve body and, through a stroker bolt threadingly engaged with a shutoff valve lever arm, a valve stem is moved within a passageway in the cover so that the aperture between a steam inlet and a steam outlet is not blocked, thereby permitting normal operation of the steam valve while the valve stem is exercised.</p> |
