Sanitary Ball Valve is usually made of high-quality stainless steel materials such as 304SS, 304L or 316, 316L, which have high hygienic safety and can resist corrosive media that may exist in food or medicine. Ordinary ball valves may be made of cast iron, cast steel, ductile iron, copper, etc. These materials may corrode or rust in certain environments and are not suitable for sanitary applications.