2026-04-13Views：
The main difference between oil and oil-free air compressor is reflected in the following aspects:
material differences:
oil air compressor: its own material contains oily substances, which may cause pollution to the terminal equipment connected to it.
Oil-free air compressor: Its body material does not contain oily substances, thus avoiding the problem of oil pollution.
Service life:
oil air compressor: Because there is no heat-resistant piston, the sealing grease is easy to lose, resulting in dry wear damage to the bearing, so the service life is relatively short.
Oil-free air compressor: The heat-resistant piston is used, which can effectively prevent the loss of bearing grease due to high temperature, thereby greatly extending the service life of the air compressor.
Working principle:
oil air compressor: During operation, oil will participate in the compression process, take away the high temperature generated by the air compressor during compression, and provide a cooling effect for the machine.
Oil-free air compressor: No oil is used in operation, whether it is an oil-free piston machine or an oil-free screw machine, they will generate a lot of high temperature during operation, but because there is no oil participation, other methods are needed to cool down.
Exhausting gas:
oil air compressor: oil lubrication, so the final discharge of the gas is oil-containing.
Oil-free air compressor: If the resin material is used for lubrication, the gas discharged is oil-free. However, please note that the oil-free air compressor is not completely oil-free, but the oil content is very small; the real oil-free air compressor is lubricated with resin materials.
In summary, the main difference between oil and oil-free air compressors is reflected in the material, service life, working principle and the nature of the exhaust gas. These differences make the two types of air compressors suitable for different application scenarios and needs.
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