The diaphragm has soft artificial rubber (EPDM) and hard artificial rubber (TFM)for chosen. Rigid artificial rubber is supported by soft rubber. 2 chip design allows two pieces of artificial rubber to work independently, so that it canreduce the tension caused by different thermal properties.Each application has a different working condition, so the diaphragm also has different requirements. In order to select the most suitable for yourapplication of the diaphragm, the following factors should be considered:working pressure, application temperature, process fluid.Soft synthetic rubber (EPDM) is suitable for most applications, and it is suitable for the application of higher operating temperature. The typical characteristic of soft artificial rubber diaphragm is its applicability to mechanical pollution medium.