1. Wetted parts :cast iron ,aluminum alloy,stainless steel 304/316,PP,PVDF etc.2. Diaphragm :Teflon,Viton,Neoprene,Santoprene,Hytrel EPDM,Buna-N etc.3. Air operated diaphragm pump using compressed air as the power source. it can convey corrosive,volatile,flamma high viscosity liquid etc.