CHYGRATM Pure PTFE fiber braided packing is a braided packing made of PTFE yarn without soaking any PTFE dispersion and lubrication but with greatly enhanced ability to seal high speed shafts with the addition of inactive and heat-resisting agents. It is recommended for chemical engineering, foodstuff, pharmaceutic where contamination is not allowed. Also it can be applied to seal all chemicals except molten alkali metals.