What materials are required for sanitary diaphragm valves?

Hygienic diaphragm valve material
Steel parts: stainless steel 304, stainless steel 316L.
Seal: EPDM + PTFE (EPDM + Teflon) This seal is made of imported sealing materials (all comply with FDA177.2600 standard).
Using Riter's unique technology, a joint bolt and EPDM/PTFE are perfectly combined into an integral sealing part. The PTFE material of the sealing part and the medium contact part has good cold resistance (-25 °C) and excellent heat resistance (+250 °C). ) Good resistance to various chemicals and excellent wear resistance to fluids!