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hand-operated valve
Manual valve circuit;
手动阀换向回路；
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Close manual valve 5 and check if manual valve 6 over the bypass with FO50242 is closed too.
关闭手阀5，同时检查并确认FO50242的旁路上的手阀6也是关闭的。
Valves with this option have a hand wheel mounted on top of the actuator for manual valve operation.
配置这种备选件的阀门在执行器顶部安装一个手轮用于手动阀门操作。
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