Oil-free air compressor really oil-free?

The name of the oil-free air compressor sounds like the meaning of "completely oil-free", but in fact, the "oil-free" here mainly means that there is no oil directly involved in the compressed air process to ensure that the discharged compressed air does not contain oil. However, this does not mean that oil-free air compressors do not need to use oil at all. In actual operation, oil-free air compressors still need to use oil to cool and lubricate their operating parts to ensure the stable operation of the machine.

Therefore, although the name is oil-free air compressor, it is not really necessary to use any oil. This is like what we often call "sugar-free food". In fact, it is not that there is no sugar at all, but that the sugar content is low or sugar substitutes are used. Similarly, oil-free air compressors still need to use oil in specific links, but these oils will not be in direct contact with compressed air.

In general, oil-free air compressors perform well in providing clean, oil-free compressed air, and are widely used where high-quality compressed air is required. But if we want to be truly "oil-free", we may need to carry out more innovation and research in technology and materials.