| 摘要 |
A gate valve (2) comprising valve body (4, 6) and a gate element (8) movable to selectively interrupt a flow passage through the valve body (4, 6). The gate element (8) is supported for rotation in a correspondingly shaped recess (14) in the valve body (4, 6). In one embodiment rotation of the gate element (8) is effected by drive means comprising a first member (10) mounted for rotation in the valve body (4, 6) and a second member (12) mounted for rotation in the gate element (8), the first and second members (10, 12) being linked such that rotational movement of the first member (10) is translated into rotational movement of the gate element (8) by the second member (12). In an alternative embodiment rotation of the gate element (8) is effected by a toothed rack (82). |
