Sealing diaphragm

rubberEPDM

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. SISTOAseptiXX EPDM diaphragms are made of an EPDM rubber that has been specially developed to withstand an operating temperature of up to 140°C. The diaphragm material complies with FDA requirements, EU1935 and has been tested and certified in accordance with USP guidelines. The diaphragms are ideally suited for use in “cold applications” such as WFI systems, and thanks to their high ozone resistance, they have also proven extremely successful in CIP and SIP processes. A fabric integrated into the EPDM rubber enables the diaphragm to be used under vacuum.