What kind of sealing material is packing?

Introduction to packing Packing is also called sealing packing. It is usually woven from softer threads. Usually square or rectangular or round strips with a cross-sectional area are filled in the sealed cavity to achieve sealing.

Packing seal was first used as cotton and linen and other fibers to be plugged in the leakage channel to prevent liquid flow from leaking, and was mainly used as a shaft seal for water-lifting machinery. Due to the wide sources of fillers, easy processing, low price, reliable sealing, and simple operation, it has been used today.

Packing is now widely used in the shaft seals of centrifugal pumps, compressors, vacuum pumps, mixers and ship propellers, piston pumps, reciprocating compressors, refrigerating machine reciprocating shaft seals, and rotating seals of valve stems, etc. .

Working Principle of Packing The surface of the shaft is very uneven under microscopic conditions, and it can only partially fit with the packing. So there is a tiny gap between the packing and the shaft, just like a maze. The medium is intercepted many times in the labyrinth, so as to achieve the sealing effect.