The packing is
made of white asbestos fiber cords impregnated with PTFE dispersion.(Addtition
of lubricant is operational.) It is soft in texture and suitable
as the sealing of pumps for liquidated chemicals. However,
packing impregnated with lubricants is reco-mended for use
with reciprocating pumps or for the sealing in places where
linear velocity is up to 10m/s.