| 摘要 |
Anticavitation and low noise means attached to the downstream port of rotary valves, having spherical or semispherical plug means, consisting of a plate having one plane terminating surface and one opposite concave spherical indentation closely engaging the spherical plug surface and containing within its circumferential boundary line a multitude of individual flow passages, each of which has a reduced diameter discharge port within the terminating plane surface of the plate.
|
