The core components of the transmission shaft seal kit for Atlas Copco air compressors
Depending on the model, it usually includes:
Main oil seal (framed rubber oil seal or polytetrafluoroethylene oil seal, oil-resistant, temperature-resistant)
Dust seal (prevents external impurities from entering)
Magnetic bushing (some models are equipped, reducing direct wear between the shaft and the seal)
O-ring or sealing gasket (auxiliary sealing, suitable for the installation surface of the housing)
Installation tools (some original kits contain special disassembly and assembly sleeves)
Application features and technical requirements
Material compatibility:
Oil-lubricated models (such as GA series): The oil seals mostly use nitrile rubber (NBR) or fluororubber (FKM), capable of withstanding mineral oil and working temperatures of 100-120℃
Oil-free models (such as ZR series): Use food-grade EPDM or PTFE materials to avoid contaminating the compressed air
Large units (such as GA90 and above) may use a combined sealing structure to balance high pressure and high rotational speed scenarios
Performance parameters:
Applicable shaft diameter: Depending on the transmission shaft specification, the common range is φ25-φ60mm
Working pressure: Generally withstands 0-16bar (standard models) or higher pressure (high-pressure models)
Speed adaptation: Meets the dynamic sealing requirements under the rated rotational speed of the compressor (generally 1500-3000rpm)
Replacement and maintenance points
Model matching:
It is necessary to strictly select the air compressor model (such as GA11, GA37, GX7, etc.) and the transmission shaft specification. The sealing dimensions of different series vary greatly
It is recommended to refer to the machine serial number to query the original factory part number to ensure that the lip structure of the oil seal and the installation depth match
Installation precautions:
Before replacement, empty the lubricating oil, clean the shaft surface and the installation seat, remove wear marks or burrs
When installing, use special tools to press in, avoid deformation of the oil seal lip (strictly prohibit knocking)
The lip needs to be coated with a small amount of clean lubricating oil (oil models) or special lubricating grease (oil-free models)
