Answer: (1) Improper assembly. Install the seal ring correctly, do not install it in reverse or misalign it.
(2) Insufficient lip pressure (oil seal). Check whether the seal size is correct; The shaft is rough or has scars; Reduce the roughness of the shaft, or use a softer seal or other sealing material.
(3) Cracked seal lip. It may be caused by the rough surface of the shaft, the incorrect sealing material used, or too high temperature.
(4) Damaged or worn seal ring. Replace the seal ring.
(5) Rough shaft. Check the surface roughness and chamfering technical requirements.
(6) Wrong seal type or material selection. Use a more suitable seal type according to the working conditions.
(7) Excessive pressure. After the air compressor is shut down, there is pressure in the system, causing the shaft seal to leak. At this time, check whether the discharge valve, outlet check valve, and air compressor shuttle valve are working properly to eliminate the system pressure after shutdown. A check valve can be installed in the system pipeline to ensure that the system is pressure-free after the unit is shut down.
(8) The temperature is too high. Use a more suitable seal type according to the working conditions.
