1, oil and oil-free air compressor generally refers to the amount of oil content of the air compressor exhaust gas discharge, generally oil machine oil content is larger.
2, oil-free machine oil content of 0.01ppm, so use this oil content to distinguish between oil and oil-free air compressor.
Second, the structure is different
1, oil compressor oil participation will take away the high temperature generated in the compressor compression process, so as to cool down the machinery.
2, oil-free air compressor in the process of operation is no oil involved, whether oil-free piston machine or oil-free screw machine, they will produce a lot of high temperature in the process of operation.
Three, different uses
1, oiled air compressor is generally used in the iron and steel industry, non-ferrous metal smelting and manufacturing industries.
2, oil-free air compressors are generally used for more compressed air quality requirements of the industry, such as food, medicine and other industries.