What is the cause of air compressor oil leakage?

The gasket is damaged or displaced; Uneven tightening force or looseness and falling off of fastening nuts lead to work failure of parts; Serious wear or aging deformation of sealing materials; Unqualified gasket material is easy to crack, resulting in loose sealing; Too much lubricating oil is added or the oil product does not meet the requirements; The joint surface of accessories is deformed and damaged, resulting in oil seepage; There is a pressure difference inside and outside the tank shell, resulting in oil leakage at the weak seal.