Selection and installation of pressure measuring instruments for high-temperature equipment
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How to select pressure measuring instruments for 340°C hot oil furnace equipment? Are there pressure and differential transducers that can withstand such high temperatures and pressures? How to address the high-temperature issue during installation? How can a condensation tank be used to reduce the temperature of the medium at 340°C to a usable level? Should it be indicated on the design diagram (add a condenser tank)?
It seems that there are no pressure transducers or differential pressure transducers designed to withstand such high temperatures directly; adding an isolation tank (which can also be called a condensation tank) will suffice. A pressure conduit about 0.5 meters long is sufficient as well – of course, the longer the pressure conduit, the lower the temperature of the isolation fluid.
What medium should be used as the isolation fluid? The water doesn’t seem to be suitable for a medium being tested at 340°C.
This post was last edited by HEJIYUER on 2015-12-12 00:36. If it is heat transfer oil, no isolation fluid is required; conventional differential pressure & pressure transmitters can be used for remote installation (installed at the bottom). The pressure tap drops to near room temperature after 1 meter. In low-temperature environments, the viscosity of heat transfer oil increases significantly, resulting in a slow response from the transmitter; heating may also be required. @jiaguoyun
There is a high-temperature pressure gauge with a radiator added; it seems to be capable of handling temperatures up to 400 degrees. For specific details, consult the manufacturer of the pressure gauge.