PTFE expansion bellows are flexible and lightweight components that are used to absorb thermal expansion or contraction in piping systems. They are made of polytetrafluoroethylene (PTFE), a high-performance polymer with excellent chemical resistance and low coefficient of friction. PTFE expansion bellows are commonly used in chemical processing, pharmaceutical, and food processing industries, as well as in high-temperature and high-pressure environments. They can be designed to handle a wide range of temperatures, pressures, and movement, and are often used as an alternative to metal expansion joints