The inner cavity and ball body of the American Standard fluorine-lined ball valve are lined with corrosion-resistant and aging-resistant polyperfluoroethylene propylene (F46) using high-pressure injection molding process, so it has reliable corrosion resistance and sealing. It is widely used in chemical, petroleum, metallurgy, medicine and other industrial sectors to realize the adjustment or cutting off of strong corrosive media such as acid and alkali in the production process, and the most obvious effect is used in the control of water treatment process.