The packing is made of polyacrylonitrile fiber, heated into carbonized fiber, which is woven into packing after impregnation in PTFE dispersion containing graphite particles. It is used as dynamic sealing in presence of media of weak acid or alkaline, or media that contain few grains of solid particles. TEMPERATURE : -210° C to +260° C PRESSURE : 25 MPA pH : 0 to