| 摘要 |
<p>PURPOSE: To surely close a shutoff valve in spite of looseness of a check valve when a pressure to a valve inlet is removed. CONSTITUTION: A valve member 37 in a shutoff valve 24 is arranged on the side facing a valve outlet 23 so as to form a stroke catcher for a check valve 25. The valve member 37 is connected to control pistons 34, 35 via a valve rod 36 guided axially in a valve casing 21 and passed through the center of a plate spring 48. The control pistons 34, 35 are loaded by a suction pressure for opening the shutoff valve 24 and ventilated for closing the shutoff valve 24.</p> |
