We are offering wafer type butterfly valve. features: 1:it employs excellent quality materials to suit various kinds of media with different temperature and concentration. 2:handy operating and save effort. 3:small dimensions in out-form, light in weight, reliable in seal and long in durablility. 4:it can be arranged in various working position. 5:manufacture standard: api609 6:inspection and test: api598 7:size ranging from 1.5" to 72" 8:temperature range: -40oc-250oc 9:pressure class: low pressure�2.5mpa 10:suitablemedium: freshwater, sewage, seawater, air, steam, food, medicine, oils, acids, alkslis, salts, etc. material of main parts: body: cast iron, ductile iron, stainless steel, copper alloy, alumininm alloy, etc. disc: ductile iron, stainless steel, corrosion-resisting steel, titanium steel, copper alloy, etc. seat: nbr, epdm, neoprene, hypalon, ptfe, food-rubber, fluoro-rubber, nr, etc. stem: 316ss, 410ss, 416ss. power: manual, pneumatic, electric, etc.