For media at high temperatures of 200 degrees or even above 200 degrees, how should a pressure and vacuum transmitter be selected?
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How should a pressure and vacuum transmitter be selected for media at high temperatures of 200 degrees or even above? Which is better, the short pressure guide tube with fins, or the long capillary pressure guide tube? What is the impact of high temperatures on pressure transmitters?
There are two types in the photo above; which one is better?
I really want to know too; I’ll just wait and learn*
1. Use a gauge designed for high temperatures and high vacuum; silicone oil gauges are different from regular ones. 2. If silicone oil is to be filled in both types of gauges, the first type is recommended; during installation, it is best to place it as low as possible relative to the pressure sampling port. 3. Both types of gauges are fine at 200 degrees; the main concern is that high vacuum can cause silicon oil to vaporize
Search online for the EJA selection manual; it contains all the information. As long as it is a heat-resistant silicone oil, there is no problem. I have seen transmissions with steam pressure measurement before, but it is still better to choose EJA models as they offer greater reliability. Ordinary instrument factories probably cannot guarantee quality
If I had to choose, I’d pick the first one. Because the pipeline also needs insulation, it will almost cover the heat dissipation neck as well……
If I had to choose, I’d pick the first one. Because the pipeline also needs insulation, it will almost cover the heat dissipation neck as well……
Diaphragm-sealed types are available; for specific models, please consult the manufacturer.
Diaphragm transmitter: DC704 silicone oil is used; it works perfectly at vacuum levels up to -100 kPa and at 320°
Both those with capillaries and those with heat sinks are acceptable; the key is the temperature resistance of the silicone oil
The first one is a bit better, in my opinion