E-PTFE stem packing with PTFE powder as raw material, the use of layering, a new technology such as high temperature tensile processed into a soft, molded packing strong letter a new type of valve packing sealing. With a low friction coefficient, good filling, and self-lubricating, and corrosion resistance, etc.; loaded convenient and flexible opening and closing popular portable, versatile and good specifications.

      Therefore especially suitable for medicine, food, fine chemical industry.