Asbestos packing is used for anti-corrosion sealing of acids and alkalis, liquid ammonia, water, oil media, valves, pumps, pistons, and rods.
Graphite packing: used for sealing valves, pumps, and reactors under high temperature, high pressure, and corrosion-resistant media; Fiber packing is a kind of thermal conductivity, acid and alkali resistance, suitable for all kinds of solvents, gasoline, water, liquid nitrogen medium pumps, valves, reactor seals (another kind of good thermal conductivity, acid and alkali resistance, high-temperature resistance, suitable for high-speed operating conditions of dynamic, static sealing). PTFE packing is made of pure PTFE dispersion resin as raw material, first made of raw film, and then twisted thread, woven into packing. This PTFE has no other additives and can be widely used in food, pharmaceuticals, papermaking chemical fibers, etc. have high cleanliness requirements, and have strong corrosive media on valves and pumps.