Fluorine lining in plug valves provides a chemically resistant shield, preventing harsh fluids from eroding or corroding the valve's internal components. This lining enhances durability by significantly reducing the wear and tear that typically results from exposure to aggressive chemicals, high temperatures, or abrasive materials.

Fluorine-lined plug valves often have bodies made from ductile iron, carbon steel, or stainless steel for strength, with linings made from materials such as PTFE, PFA, or FEP. These fluoropolymers provide excellent chemical resistance and thermal stability, making the valve resilient in harsh conditions.

Fluorine-lined plug valves generally have moderate pressure ratings compared to metal-seated valves. They perform well in medium-pressure environments but may not be suitable for ultra-high pressure situations due to the limitations of the lining material. However, for corrosive services, they offer better durability than unlined valves.