VALVE ACTUATOR

摘要

A lockable valve actuator for preventing rotation of a valve stem unless the actuator has been unlocked. The actuator comprises a base (1) which is mounted on the body of a valve to be controlled, a drive member (2) which rotates relative to the base with the stem (9) of the valve, and a lock mechanism which is engaged with the drive member and incorporates a bolt (16) which can be moved to a position in which relative movement between the base and lock mechanism is prevented. A lever (5) is used to apply torque to the actuator, the lever pinning the actuator components together. In an emergency, the lever can be removed temporarily, thereby enabling removal of the lock mechanism, and then re-engaged with the drive member so as to enable actuation of the valve.