| 摘要 |
An apparatus for limiting the rotational travel of a shaft of a valve actuator. A shaft engaging element having detents disposed therewith is connected to the shaft. A stop element is coupled to the actuator. When the shaft engaging element rotates with the shaft, the detents cooperate with the stop such that after a predetermined degree of rotational travel of the shaft the detents limit the travel of the shaft such that the resultant force balance of the shaft engaging element and thus the shaft is substantially zero.
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