Braided Graphite Packing
This is the most common type, made from braided graphite fibers. It offers excellent flexibility and strength, allowing it to conform to various complex sealing geometries. The braided structure enables it to fill gaps effectively during sealing, thereby preventing media leakage. It is widely used for applications such as shaft seals and valve seals in general industrial equipment.
Expanded Graphite Packing
This type is produced by expanding graphite material. It possesses excellent compressibility and resilience; upon compression, it conforms tightly to the sealing surface, creating an effective seal. Its sealing performance remains stable even in high-temperature environments. It is suitable for sealing high-temperature, high-pressure equipment, such as high-temperature reactors and steam pipeline valves.
Wire-Reinforced Graphite Packing:
Incorporating a metal wire reinforcement layer into the graphite packing enhances its overall strength and wear resistance. This type of packing is suitable for applications requiring high sealing integrity and involving significant friction and vibration during equipment operation. It effectively extends the service life of the seal and reduces maintenance frequency.
Impregnated Graphite Packing:
This packing is impregnated with specific chemical substances to enhance particular performance characteristics. For instance, impregnation with polytetrafluoroethylene (PTFE) improves the packing's corrosion and chemical resistance. It is suitable for sealing pipelines and equipment in the chemical industry that handle highly corrosive media.
