e+h differential pressure level gauge
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I would like to seek advice from the seniors! Our company’s deaerator is equipped with a differential pressure level gauge, and electric heating has been installed to prevent this gauge from being damaged by freezing in winter. Recently, there have been frequent instances where the limit is exceeded instantly, triggering an alarm, only for things to return to normal again; this phenomenon occurs quite often. The instrument functions normally after the electric heating is turned off. Please, senior colleagues, help analyze it – there must be a reason! Thank you!
I’ve seen similar introductions. The temperature of the electric heating element exceeding the boiling point of the isolation fluid causes the isolation fluid to boil and vaporize, resulting in errors. The solution is to control the temperature of the electric heating.
I guess the heat tracing can be removed these days as well
Because what is measured is the pressure difference, and this pressure is very low; it is easily affected by temperature. As mentioned on the second floor, find a way to adjust the temperature to an appropriate level
I could ask how “the appropriate temperature” is defined? Additional note: By checking the previous historical data, it was found that this issue also occurs in winter. Does this indicate that the temperature set for heating is not appropriate? Our current heat tracing is around sixty to seventy degrees.
If the heating cannot be adjusted properly, the distance between the heating tube or cable and the pressure guiding tube or diaphragm can be increased to avoid direct contact; insulation should also be applied on the outside
The opponent can increase the distance between the heat tracing tube or cable and the pressure guiding tube or diaphragm