Fluorine-Lined Diaphragm Valve is a specialized corrosion-resistant industrial valve, featuring a fluoropolymer (PTFE/PFA/FEP) lined inner body and a flexible diaphragm that isolates the valve internals from the medium. Compliant with ANSI/ASME, ISO, or GB standards, it uses the diaphragm’s deformation to control flow or shutoff, making it ideal for corrosive, high-purity, or sterile media applications.