What is the difference between oil-free air compressor and oil-containing air compressor?

From the oil content point of view, oil-free and oil-free in air compressor generally refer to the oil content of the gas discharged from the exhaust port of the air compressor. Generally, the oil content of oil-containing air compressor is larger, and the oil-free air compressor has an oil content of 0.01ppm, so this oil content is used to distinguish between oil-free and oil-free air compressors. There is also a completely oil-free air compressor, which is not lubricated with oil, but lubricated with resin materials, so the gas discharged in the end does not contain oil and is called a completely oil-free air compressor.

From a structural point of view, there is no difference between the bearings of oil-free air compressors and oil-containing air compressors. However, from the working principle point of view, there are obvious differences between the two. There is no oil involved in the operation of oil-free air compressors. Whether it is an oil-free piston machine or an oil-free screw machine, they will generate a lot of high temperature during operation. If it is an oil-free air compressor, the participation of oil will take away the high temperature generated during the compression process of the air compressor, thereby cooling the machine.

However, oil-free air compressors do not use oil, and they also generate a lot of high temperature during the compression process. How to solve the high temperature and ensure the normal operation of the machine? In fact, a special high-temperature resistant material called Teflon or molybdenum disulfide is used inside the oil-free air compressor to replace oil to solve the high temperature during the compression process of the air compressor, thereby achieving the purpose of oil-free compression.

Oil-free air compressors are cleaner and more environmentally friendly to a certain extent than oil-containing air compressors. Therefore, institutions such as hospitals, laboratories, and schools are very suitable for the use of oil-free air compressors, and these institutions also prefer to use oil-free air compressors.

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Normal service life of air compressors