| 摘要 |
<p>A fluid control valve which comprises a housing (1) having an inlet port (2), an outlet port (3) and at least one valve seat (4) therebetween. A first valve member (5) is located within said housing and is movable into and out of engagement with said valve seat (4). A second valve member (7) is operatively associated with said first valve member (5) whereby movement of said first valve member (5) to its fully disengaged position causes said second valve member (7) to close off fluid flow upstream of said first valve member (5) and allow servicing thereof.</p> |
