It is a high-quality braided packing made of PTFE yarns fiber with incorporated graphite and the reinforced corner yarns of Aramid fiber. It can prevent gap from extrusions in the present of high pressure and temperature. It has good sliding velocity and thermal conductivity. It enables to seal high pressure piston pump during along running period. It can be used seal water, sewage water, hot water, oils, greases, weak acids and alkaline solutions and abrasive media.