Pressure gauge with diaphgram seal - series MSE

The diaphgram seals are used to protect the pressure gauges from crystallizing, aggressive, toxic, harmful, viscous, adhesive and dangerous fluids for environment and people.

They are composed by a welded membrane which is realised with suitable materials according to the fluids to be measured, so they satisfy even the most stringent measurement and safety requirements.

Thanks to a very wide choice of transmission fluids that hydraulically trasmit the membrane pressure to the measuring instrument, the separator has unlimited applications also because of the innumerable types of process connections and construction materials.

Among these applications we can find:

  • MSE  It is a diaphgram seal with threaded connection, used as a generic one since it allows to measure almost all pressures thanks to the possibility of using more or less wide flanges depending on the uses. It is mainly used in the process applications.
  • MSE/A  It is a diaphgram seal Tri-clamp, mainly used in sterile environments; thanks to the aid of a clamp, it allows the integration into the process in a quick and simple way. These separators are suitable for pharmaceutical and chemical applications.
  • MSE/S  It is a diaphgram seal threaded DIN11851, particularly suitable for the food industry. The assembly of this separator to the process takes place by simply screwing the separator swivel onto the threaded connection of the process. It is mainly used in different steps of the food chain, for example in filling systems, in pasteurization machineries like level meters (e.g. wine tanks) or for simple filtration and separation.


  • Food industry MSE/S (dairies, oenology, beer, soft drinks etc…)
  • Pharmaceutical / chemical industry MSE/A
  • Septic applications MSE/A
  • Corrosive fluids, high temperatures, viscous MSE
  • Chemical / petrochemical industry MSE


When the instrument is subjected to fluctuations in the ambient or process temperature, variations in the volume of the filling liquid are generated which are absorbed by the elastic parts of the instrument itself.

A part of these variations is absorbed by the diaphram seal while the remaining one is absorbed by the sensitive element of the measuring instrument. This last one gives an error in the indication of the measured pressure.

To contain this error as much as possible it is necessary:

  • To reduce the volume of the filling circuit to the minimum
  • That the membrane flame is as large as possible

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