The industry tested NGK ceramic plug valve offers many advantages over valves manufactured with other materials. The ceramic is resistant to corrosion and is able to handle all liquids except hydrofluoric acid and hot caustics. It is impermeable, without pin-holes and resistant to erosion due to its high hardness. Solid chemical ceramic is harder and tougher than fluoroplastic materials, providing unsurpassed abrasion and corrosion resistance in the most difficult CPI applications.