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Several misunderstandings of oil-free air compressors

Apr 08, 2022

1. Is the compressed air produced by an oil-free air compressor oil-free?

Although no oil is used in the compression chamber, the oil will not come into contact with the compressed air, but the oil vapor contained in the atmosphere itself cannot be removed, which makes the compressed air still contain a small amount of oil impurities. The oil content in the compressed air produced by the oil-air compressor is closely related to the air quality, the environment of the air compressor room, and the cleanliness of the compressor.

 

2. Oil-free air compressors do not use oil?

Although oil is not used to contact the air in the process of compressing air, oil is still used to cool the compressor and lubricate the operating parts, so that the compressor can run normally and stably.

 

3. Is the compressed air produced by the oil-free air compressor pollution-free?

There are many pollutants in the atmosphere, including dust, water vapor, oil vapor, microorganisms, etc. The compressed air produced by the oil-free air compressor can only ensure that no oil is brought into the compressed air during the compression process, but it cannot remove the magazines in the air itself. This means that the compressed air produced by oil-free compressors is not necessarily free of contamination, and the need to use air treatment products can help reduce contamination to desired levels.

 

4. Oil-free air compressors do not need air treatment products?

As above, the gas quality of the compressed air produced by oil-free air compressors is largely controlled by the environment, so users need to configure corresponding post-processing equipment according to their own needs for compressed air quality to meet their own needs for compressed air quality. .

 

5. Low cost of oil-free screw air compressor

In fact, because the compression ratio is much smaller than that of oil-lubricated compressors, the energy consumption is higher. The gas production of the same power oil-free compressor is more than 40% less than that of the energy-saving screw compressor. Although the compression chamber is not lubricated by oil, other The grease and air filter in the parts still need regular maintenance.

The core rotors are generally treated with special coatings and have a long service life. They have high requirements for water and are easily damaged. The maintenance of the main engine is a must for oil-free machines. The high cost can account for 50% of the equipment cost.

 

We think, for most users, it is not necessary to really need oil-free compressed air of grade 0, but more to solve the problem caused by oil impurities. It is an option to prevent the pollution of water equipment and prevent the efficiency of post-treatment equipment from decreasing or even losing the function of water removal. For users who need true grade 0 oil-free compressed air, it is difficult to obtain oil-free compressed air stably and continuously by using an oil-free air compressor alone, and it is still necessary to configure the corresponding oil-removing post-processing equipment.


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