Fluorine‑lined valves are internally lined with PTFE, featuring excellent resistance to strong acids, strong alkalis, oxidants and other corrosive media, with good sealing performance and aging resistance.

They are widely used in chemical, pharmaceutical, wastewater treatment, electroplating, fine chemical and mining industries for transporting corrosive fluids such as hydrochloric acid, sulfuric acid, caustic soda, chlorine and brine, to cut off, regulate and prevent backflow of media and protect valve bodies from corrosion.