Fully welded diaphragm seal systems

Diaphragm seals are often the best choice, if vibrations, high temperatures or aggressive media need to be kept away from pressure and DP transmitters – provided that gas cannot enter the filling oil in the diaphragm seal system. Leakages in the attachment to a pressure transmitter or at the sealing face of the diaphragm compromise any measurement.

For a high degree of application safety, the connection between KROHNE pressure transmitters and a diaphragm seal system  (e.g. via capillary tubes) is always fully welded after the system has been filled. In addition, the weld seams of the diaphragms are drawn over the sealing face. There is no contact of the process medium to the less corrosion resistant weld seam and the material transition of the membrane to the base material.