| 摘要 |
<p>The valve includes a sleeve having an inlet end and an outlet end adapted for series connection of the sleeve in the operational gas line. A hole is provided through a wall of the sleeve, and a coupling is secured in the hole, having a passage in pneumatic communication between a first port in the coupling external of the sleeve and a second port in the coupling internal of the sleeve. The second port has an annular seat along a perimeter. A cage extending from the second port into the sleeve loosely contains a ball of diameter greater than the diameter of the annular seat. The cage has openings for continuous pneumatic communication between the inlet and outlet ends of the sleeve.</p> |
