Application scenarios of flanged pressure (differential pressure) transmitters and regular pressure (differential pressure) transmitters
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I would like to ask everyone: what are the differences in the applications of flanged pressure (differential pressure) transmitters compared to ordinary pressure (differential pressure) transmitters? Why is a flange type also used for the liquid level of some steam condensate?
I really want to know too~~~~~
The steam condensate tank is an open-container type, allowing the use of a single-flange differential level gauge； Otherwise, double flanges should be used.
Flange-type differential pressure transmitters are used in applications with dirty media; using diaphragm-type differential pressure transmitters in such situations often leads to clogging of the diaphragm tubes, making maintenance and cleaning difficult.
For some process fluids that tend to clog the pressure tap pipes, flange connections can prevent such blockages; moreover, flanges can be equipped with flushing rings for cleaning them； Furthermore, for corrosive liquids, I believe flange connections ensure that the liquid does not come into direct contact with the transmitter’s diaphragm, thereby preventing damage to the transmitter.
Double-flange differential pressure transmitters are suitable for measuring media with high viscosity, tendency to clog, tendency to crystallize, or corrosion susceptibility. However, when selecting such transmitters, attention must be paid to the pressure rating of the flanges, the material of the flange diaphragms, and the temperature range tolerance of the fluid used to fill the flanges. As for the use of double-flange transmitters for condensate water, the main advantage is the ease of maintenance; this is particularly important in northern regions, where such transmitters are a good choice to prevent freezing. Additionally, the fewer connections in the instrument piping system, the fewer static sealing points there are, which in turn leads to easier maintenance and better stability. This post was last edited by ZZD109 on 2009-4-11 10:36.]