These packings are made from braiding of aromatic polyamide yarn (Kevlar),which is first dipped with PTFE emulsion then treated with lubricant and inhibitor of corrosion,finally braided to form square corss-section.Because Kevlar yarn has excellent properties with very hith strength and module (It is called artificial steel wire.).So compared with other kinds of braided packing ,they can restist more severe media and higher pressure.They can be installed separately form other kinds of packings as well as combing with others to form packing sets of different characteristics to be used as end rings.

This kind of packings is mailnly used as substitute of asbestos in pump system.Not only it protects environment but also its property is better than asbestos.Even if under very bad conditions where ordinary asbestos packings can'provide satisfied service effect more better and it is often used at bad conditions,such as :water pumps at mortatar site,tinmine,punmine,pulp factory and power plant.

使用条件：Applicable conditions