Introduction to fluorine-lined valve knowledge

Fluorine-lined valve, also known as fluoroplastic-lined corrosion-resistant valve, is to place PTFE resin (or profile processed) on the inner wall of the steel or iron valve pressure part by moulding (or inlay) (the same method It is suitable for the inner lining of various pressure vessels and pipeline accessories) or the outer surface of valve inner parts. It is made into various valves and pressure vessels with its unique performance in resisting strong corrosive media.

Fluorine-lined ball valve PTFE, commonly known as "Plastic King", was first developed by DUPONT CO., LTD in the United States in 1938. It was industrialized in 1949. It has a history of 50 years from the perspective of industrial application, and it is truly widely used. The application in the valve industry is not long.

The fluorine-lined valve adopts the lining process for all the places in the valve body that the medium can reach. The lining material is generally FEP (F46) and PCTFE (F3) and other fluoroplastics, which can be applied to various concentrations of sulfuric acid, hydrochloric acid, and hydrofluoric acid. , Aqua regia and various organic acids, strong acids, strong oxidants and other corrosive media, but the fluorine-lined valve is limited by the temperature (only applicable to the medium between -50℃～150℃), Valves made of fluorine-lined plastics include: fluorine-lined butterfly valves, fluorine-lined ball valves, fluorine-lined globe valves, fluorine-lined diaphragm valves, fluorine-lined gate valves, fluorine-lined plug valves, etc.