Fluorine-Lined Butterfly Valve (also known as Fluoropolymer-Lined Butterfly Valve) is a specialized corrosion-resistant industrial valve, featuring a fluoropolymer (PTFE/PFA/FEP) lining on the inner valve body, butterfly disc, and sealing surfaces, complying with ANSI/ASME, ISO, or GB standards. It combines the compactness of butterfly valves with the extreme corrosion resistance of fluorine materials, ideal for harsh media control.