| 摘要 |
An electrically operated valve is provided including a motor securely and non-rotatably mounted to the valve and in communication with the valve stem. A cam also is mounted to the valve stem. A limit switch with a cam follower is mounted to the motor gear housing at a plurality of locations so as to assure non-rotatability. The cam follower is disposed to contact and follow the cam, and to provide a signal for stopping the rotation of the valve stem.
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