Perfluoroether rubber has excellent high temperature resistance, chemical resistance and radiation resistance. We have developed a series of perfluoroether rubber blends with grades FFKM-80, FFKM-90, etc., they have a long term temperature resistance level of up to 300℃ and an extreme level of up to 350℃. It has good chemical stability, media resistance, flame retardant and so on. Sealing Ring are mainly used in electromechanical equipment, instrumentation, aerospace and other fields of all kinds of fluids, such as water, oil, air, chemical solvents, chemicals, etc., static and dynamic gap and semiconductor vacuum sealing.