I found from replies that 9 feet of tubing is suitable to lower the temp. of fluid (500 degreeC) to pressure gauge. What about utilisation of capillary type pressure gauge?
If by capillary type you mean remote diaphragm seal, I would say NO, the temperature is too high. Also I doubt you need 9 ft. of tubing, even a few inches will be sufficient depending on what you are measuring. There will be very little fluid circulation, most of the heat transferred to the gauge will be through the metallic tubing. Give us some more details on what you propose to measure.
The rule of thumb is 100 degF per foot.
500C-0C = 932F-32F.
To drop 900 F degrees you should use 9 feet of tubing. You probably don't need to drop all the way to 0degC. 8 feet calculates to 132F (55.6C) and would likely keep the instrument cool enough.
I need to measuring pressure on ethylene process but there is a problem in temperature because we have low temp.(-110 ‘c) would you please do a favor for me and lead me how I can solve it.
