Instrument pressure tapping reverse blow
Thread Content
Some media can easily clog the pressure tapping tubes, so instrument air is required for purging. As shown in the figure below:
Isn’t this picture one from a member of the HaiChuan advisory group on the forum?
This type of back-blowing has been used extensively in conjunction with blast furnaces many years ago, but only under ideal conditions.
Alright, in this case it’s better to use a flanged diaphragm pressure transducer – it’s not as tiring to operate.
What about high-temperature gas media, such as those above 350 degrees?
Single-flange capillary pressure transmitter, equipped with high-temperature resistant silicone oil
Yes, I lack experience and have not considered all aspects; for high-temperature gas-phase media, measurement using air backflow is the optimal approach.
The devices used in the DMTO unit for measuring reverse pressure, differential pressure, density, and inventory all come equipped with backwashing functionality.