What are the methods for checking the valve position of a control valve?
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How is the valve position of a control valve checked? Let’s discuss it
What is the purpose of the inspection? Is it to check the feedback between the DCS and the field?
Before starting the machine, supply instrument air to the control valve, release the handwheel, and then contact the control room; the control room will adjust the control valve to ensure that its position matches the one on-site. Once this is confirmed, restore the valve’s position to its normal setting!
Just compare the DCS value with the actual valve position
Compare whether the valve position at the site matches the control signal
Whether the valve opening display matches the actual condition on site