The control valve positioner has frozen – what could be the reason?
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The control valve positioner has frozen – what could be the reason?
Can a locator also get damaged by freezing? There must be water in the air supply; check whether there is water in the filter regulator. If there is water in the instrument air, then it’s not just the locator that’s faulty – the entire plant needs to be inspected, and the issue must be addressed at its source by checking the air compressor.
Confirm it was damaged by freezing? Check whether water or steam has entered the locator? Or check whether the instrument air supply is qualified
Frozen to death? ? ? There must be water; electronic components generally don’t get damaged by freezing, except at temperatures below minus 40 degrees……
1. Water in the air supply； 2. There are leakage points in the pipeline or equipment, causing leakage to the valve positioner ； 3. Process operators fail to be careful not to get water or steam on it during work ；
Smart locator or mechanical locator? I think the most likely possibility is that there is water in the gas supply
There is a high possibility of water in the gas supply, especially in companies that do not control the dew point of the gas used in instruments. It is recommended to focus on the gas used for the instrument, and to check its dew point, assuming that external water ingress is not the cause. The dew point of the pressure in the air source of the gas supply system (under online operation) should be at least 10°C lower than the lowest annual (seasonal) extreme temperature in the operating environment or in the region over historical records. Reference standard
Everyone reached the same conclusion: there is water in the gas supply, so looking for the problem in the gas source is the right approach.
The baby is afraid of the cold! ! ! ! Don’t think that electrical equipment is immune to cold; in extremely cold conditions, moisture in the air inside the equipment will condense and accumulate on the circuit boards, causing short circuits and damaging the equipment. This is especially true in areas with high humidity.