... chemical industry,petroleum,chlorine/alkaline,metallurgy,pharmacy,dyeing,foodstuff,environmental protection and pure water etc..h.Part material sheetNo.Part NameMaterial1StudSteel ... ,PPH,CPVC,UPVC15FlimEPDM16DiaphragmFEP,PFA17PinSteel,Stainless Steel18DiscSteel,Stainless Steel Plastic PVDF Flanged Weir Type Diaphragm Valve