NO. : P219

The carbonized fiber yarn is treatded with graphite particles, and then is braided to from packing .Its surface is coated with an high -temperature-proof lubricant .It is able to bear high temerature and pressure, and helps prevent abrasion and volume loss to the packing rings .It can also help to minimize the effects of electrolytic pitting of the valve stem.

NO. : P220

impregnated with PTFE dispersion .1t is inert toalmost all corrosive chemicals.When it is used for pumps,frictional heat is freely conducted to the stuffing box metal because of its excellent thermal conductivity ,and  thus no damage will be caused tothe packing 1t can replace PTFE  asbestos packing within wide service range. It can be used to seal  corrosive fluide except strong oxidizer acids, organic  solvents, fluids where contamination is not permissible for centrifugal