| 摘要 |
<p>A control valve capable of preventing a valve head from biting in a valve seat, capable of being reversed satisfactorily, and capable of eliminating chattering at the time of valve closing while facilitating the overall configuration thereof, comprising a valve stem (3) moving forward and backward interlockingly with a rotating drive body (8) and seating and departing the valve head (4) on and from the valve seat (2) provided in a valve casing (1), wherein the rotatingly driving body (8) is directly coupled to the valve stem (3) through a large lead screw having a large lead relative to a screw diameter, and a rotation stop body (9) for preventing the valve stem from being rotated as the rotatingly driving body is rotated is provided between the valve casing (1) and the valve stem (3).</p> |
