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。
Valves with this option have a hand wheel mounted on top of the actuator for manual valve operation.
所有阀门都可以配置手轮、链轮和锥齿轮手轮和链轮。
All valves can be furnished with handwheels, chainwheels and bevel gear handwheels and chainwheels.
注明从阀门中心到手轮的所需加长件的长度。
Specify required extension length from centerline of valve to handwheel.
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