Measures to prevent clogging of pressure guide tubes
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If the medium being measured contains dust, how should the pressure guide tubes of pressure gauges and pressure transmitters be handled?
Schedule regular cleaning, or install a reverse blowing device
I have never used a backflow device before; should I install a tee valve on the pressure gauge conduit to use for backflow purposes?
Yes, you also need to control the backflow rate; search on Baidu for the specific installation requirements for backflow systems
Using a flanged diaphragm type – with a larger opening like this, isn’t it less likely to get clogged?
A remote diaphragm pressure transducer can be used instead
There are specialized anti-clogging samplers, whose structure is somewhat similar to that of an elbow fitting, and the pressure guide tube is made as short as possible while still meeting the required specifications.
Why not use a remote diaphragm pressure transmitter? It doesn’t cost much more, and it is easier to install and maintain in the future, as well as providing more accurate measurements
During the installation of the pressure guide tube, keep it as short as possible. This prevents the use of too many intermediate joints, which would make maintenance difficult. By adding a backflow system, it is necessary to include additional pressure guide tubes/backflow components (such as flow and pressure limiting orifice plates, etc.). For specific details, one can consult design firms or companies that produce pipe and valve components. Capillary diaphragm pressure transmitters can also be used.