When the control valve handwheel is turned, does the valve position indicator change?

2011-02-16View Original

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When the control valve handwheel is turned, does the valve position indicator change?

Reply #22011-02-16

Yes, the valve position indicator moves together with the valve stem; therefore, whether it is operated manually or automatically, it is the valve stem that drives the valve core to move, and thus the valve position indicator also moves along with it.

Reply #32011-02-16

Some move, while others do not; it depends on whether the handwheel has a switching mechanism. In models equipped with a conversion device, the handwheel won’t move no matter how much it is turned when it’s not in the control position; however, when the handwheel is turned while in the conversion position, the valve position indicator changes. In those without a conversion device, rotating the handwheel changes the valve position.

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