| 摘要 |
<p>A tapered plug valve having a sealing member (4) on the plug (3) positioned to surround the passageway (7) through the valve casing (1) on the downstream side in the valve closed position. No part of the member (4) is contacted by fluid flowing through the valve while the passageway (7) communicates with the port (6) in the plug (3). As a result the member (4) is less likely to suffer damage from moving liquid, especially if solid particles are present in the fluid. <IMAGE></p> |
