| 摘要 |
An actuator for a motorised valve is disclosed, as is a motorised valve incorporating a valve body and such an actuator. The actuator comprises an output member (32), a motor (10), and a transmission for connecting the motor to the output member. The motor can drive the output member between first and second extreme operational positions through the transmission to operate a valve body towhich it is connected. The transmission has lost motion, whereby the output member can be moved by a manual control (40) between the first and second extreme operational positions substantially without causing movement of the motor.
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