How do diaphragm pressure gauges (micro-pressure diaphragm gauges) achieve heat resistance
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How can diaphragm pressure gauges (micro-pressure diaphragm gauges) withstand high temperatures? For example, when the medium is at 400 degrees, is it effective to add a radiator between the gauge head and the diaphragm? If the diaphragm pressure gauge is of the compression type, not the type welded in place, how can its resistance to high temperatures be ensured?
I’ve also been looking for ways to achieve a temperature resistance of 400 degrees; experts, please help out!
Are there any cooling devices in place in areas where the medium is at high temperatures? For example, could a separate stainless steel tube resistant to high temperatures be used on the pipeline to extend upward for a certain distance (such as 200 mm), so that the temperature of the medium at the location of the diaphragm is reduced?
If extending the pressure tapping pipe with a U-bend doesn’t work, then use an isolation tank to separate things with isolation fluid.
I wonder how manufacturers take these factors into account; what do they do if the medium is corrosive at high temperatures?
If it is a micro pressure gauge, will the use of pressure leading or isolation cooling affect its accuracy? . After all, there is no accurate direct measurement.
Use a pressure guide tube to draw out the pressure for measurement. This is how the micro-pressure on ordinary incinerators is measured.
The temperature is really high; on one hand, this requires increasing the length of the pressure introduction section. Perhaps considering using clean nitrogen for backwashing would be a good idea, and the flow rate of nitrogen needs to be carefully controlled!
Gas media can definitely be cooled by lengthening the leads, but it’s more difficult with liquid-level media, as mentioned on floor 6
When the medium temperature is high (above 400 degrees), and there is also corrosion, viscosity, and dirt, selecting a pressure transmitter for such industrial applications can be quite challenging