| 摘要 |
<p>An actuator for controlling the rotation of a valve spindle relative to a valve body (5). The actuator is in the form of an actuator body which receives a rotatable hub (6). The actuator body (3) is secured to the valve body by for example a mounting plate (7) which is bolted to the valve body or straps which are clamped to pipework connected to the valve body. The hub is retained in a predetermined position adjacent the valve body by the actuator body such that it may rotate with the valve spindle. Jaws (15) are mounted on the hub which may be clamped into engagement with the valve spindle so that torque applied to the hub by for example an actuator bar (12) is transmitted to the valve spindle.</p> |
