Answer: (1) Inhaled impure air such as iron oxide, carbon dioxide, dust, etc. will accelerate the deterioration of oil.
(2) The used oil is not discharged cleanly. Mixing it with the newly filled oil will significantly reduce the service life of the new oil. When changing the oil, there is a certain oil capacity in the oil cooler. Some air compressors have a certain oil cooling capacity. The position of the separator is low, and it is difficult to drain the old oil through the oil separator. Therefore, there will be a mixture of new and old oil. In severe cases, the newly filled oil will soon turn black.
(3) The operating temperature of the air compressor is too high, which accelerates the oxidation and deterioration of the oil.
(4) When the operating temperature is lower than the dew point temperature, condensed water will enter the oil, causing emulsification during use.
