PTFE lined bellow expansion joint is commonly used in chemical pipelines, acid and alkali pipelines,PTFE Lined Bellows expansion joint refers to a bellows expansion joint with an additional layer of PTFE material on the inner diameter. This material is a high-quality material that is resistant to acid and alkali.It has many advantages:1.High temperature resistance: working temperature up to 250℃;2.Low temperature resistance: With good mechanical toughness, it can maintain 5% elongation even when the temperature drops to -196℃;3.Corrosion resistance: inert to most chemicals and solvents, resistant to strong acid, alkali and various organic solutions;4.Weather resistance: has the best aging life among plastics;5.High lubricity: It has the lowest friction coefficient among solid materials;6.Non-adhesive: It has the smallest surface tension among solid materials and does not adhere to any substance;7.Non-toxic: It is physiologically inert and has no adverse reactions when used as artificial blood vessels and organs and implanted in the body for a long time.