PTFE is probably one of the most widely used fluoropolymers within the lined industry for components. It uses include seats, packing material, and Valve. The reason it is used for these components is due to its high molecular weight, which leads to its high strength compared to other fluoropolymers, and its resistance to wear from cycling applications. PTFE provides excellent chemical resistance and also excellent mechanical strength. Fabrication of PTFE is accomplished by a press and sintering process. PTFE cannot be melt processed.