What are the symptoms when there is a fault in the actuator of a control valve?
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If the actuator of a control valve fails, what actions will the valve exhibit?
The valve signal indicates a deviation; the actual position of the valve does not match the set position. The valve may get stuck, which prevents the signal from functioning properly
The valve sticks, and the valve positioner fluctuates back and forth, resulting in fluctuations in the flow rate of the process medium