| 摘要 |
<p>A trim means for a valve such as a choke, control and/or anti-surge control valve, comprising a plug (2) engageable with a seat (11), and including a plurality of flow control elements (8a, 8b) that are moveable along a path to control flow through the trim means, wherein: the flow control elements (8a, 8b) are spaced apart along the path, each flow control element (8a, 8b) defining a corresponding flow path, and movement of each flow control element (8a, 8b) along the path progressively varying the flow area through its corresponding flow path.</p> |
