Chemical Resistant Envelop Flange is made using quality grade PTFE material. The Flange is suitable sealing accessories for tire repairing machinery. The Flange has good thermal resistance capacity and low flammability. The Flange has low friction co efficiency, chemical resistance capacity, high insulation level and non sticky surface. The Flange is hydraulically pressed and is light in weight. The Chemical Resistant Envelop Flange has high temperature proof design and good mechanical properties.