SISTOAseptiXX 2-pieceTFM/EPDM diaphragm

With the SISTOAseptiXX 2-piece TFM/EPDM diaphragms, diaphragms with a thicker TFM layer are available. In order to fully utilise the actuation force without affecting the plastic diaphragm’s long service life, the TFM diaphragm is backed by a second diaphragm made of EPDM.

A metal pin embedded in the TFM diaphragm is used to lift the diaphragm and thus to open the valve. In order to prevent damage to the diaphragm during valve closure, the metal pin is fitted to the bonnet assembly by means of a floating nut.

The materials comply with the specifications of FDA, EU1935 and USP. These diaphragms are perfectly suited for applications involving high chemical and thermal stress.