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.