The direction of operation of the control valve controller in the new device has been reversed
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Let’s all talk about whether, when the new installation was put into operation, there were any instances of malfunctioning in regulation – situations where it closed when it should have opened, or opened when it should have closed – due to the control valve controller having its directional setting reversed
It can be said that situations where things are installed in the wrong way have indeed been seen; for example, mistakes in the settings of the valve positioner can lead to the opposite effect being produced. But this situation is rare. Furthermore, today’s valves and process control signals all come with feedback signals; making a mistake in this regard can result in the valve failing to operate properly – it won’t close when it should and won’t open when it should.
Both the valve and the process monitoring signals come with feedback signals; generally there are no major issues. However, we should contact the instrumentation team for inspection before putting them into use, as this provides a reason to address any problems that may arise
Regulation often fails due to issues with instruments or wiring, resulting in the device turning on when it should be off, and turning off when it should be on. Therefore, each control valve of the new device needs to be calibrated
There is still a chance that this situation will occur. But generally, one checks each gauge individually before driving, so there are no problems when starting the car.