| 摘要 |
Various control valves are provided. In one embodiment, a valve (38) includes a hollow body (40) with an inlet (74) and an outlet (76) along a common axis (72) of the hollow body. A trim (44) is disposed inside the hollow body along the common axis and includes a conduit (46) and a sleeve (48) disposed about the conduit to selectively cover fluid ports (92) in the conduit. Further, the valve includes a pressure-balanced stem (52) connected to the sleeve to enable the sleeve to be moved along the conduit via the stem. Additional systems, devices, and methods are also disclosed. |
