Ball valve lined with fluorine with fluoroplastic as lining and shell made by investment casting is of high strength and clear and smooth appearance, and the part which contacts liquid is made of fluoroplastic, therefore, the valve can be applied to corrosive pipeline and tubes of any concentration for long under -20℃~180℃. As it is designed for control the automatic opening and closing of corrosive medium pipelines and is widely used in industries such as petroleum, chemical engineering, dyes and chemicals, pesticide and acid and alkali production, pneumatic ball valve lined with fluorine is one of the idealist corrosion-proof valve equipment.