| 摘要 |
<p>A valve comprising a casing having a passageway therethrough for flow of fluid and a tapered bore intersecting the passageway, a tapered plug rotatably mounted in the tapered bore adapted to block the passageway in valve closed position of the plug and the plug having a port adapted to connect and be in communication with the passageway in valve open position, the plug and casing providing chambers at opposite ends of the tapered plug, means for connecting the chambers to the port to dynamically balance the plug within the casing when the plug is partially or fully open, a biasing means is provided in the casing to axially bias the tapered plug in the direction of the larger end of the plug.</p> |
