Sealing diaphragm

rubberEPDMchemical-resistant

In practice, this means that we are able to cover a comprehensive spectrum of applications with just a few diaphragm types. A change between the diaphragm types in the same diaphragm size can be carried out easily without having to replace other components. The design of the diaphragms is specially adapted to the unique SISTO sealing system. This means that the diaphragms are chambered into the valve bodies and are fully supported from the rear by a spiral spring made of stainless steel. The SISTOAseptiXX diaphragms come from our own production and are manufactured using high-quality materials. The diaphragms as a very important component of the diaphragm valves are subject to constantly being further developed by SISTO. The elastomer diaphragms bonded with TFM are made of an FDA compatible EPDM rubber which is firmly bonded to a TFM film featuring improved mechanical properties and lower permeability compared with conventional PTFE. The material quality of the EPDM and the TFM films complies with the specifications of FDA, EU1935, and USP. The TFM’s excellent chemical and thermal properties make this diaphragm type the first choice for applications with chemically aggressive and abrasive media as well as high temperatures.