What does the residual oil content ppm of the air compressor mean

In the field of air compressors, "ppm" is an abbreviation of "parts per million", meaning "one part per million". When talking about the residual oil content of the air compressor, ppm is used to quantify the oil content in the compressed air. In the field of air compressors, ppm is usually used to express the weight of oil per million parts of air in compressed air.

For example, if the residual oil content of the air compressor is 2ppm, this means that there are 2 parts by weight of oil per 1 million parts by weight of compressed air. This is a very important indicator, especially in applications that require pure compressed air, such as food, medical or precision manufacturing industries. High oil content may affect the production process or product quality in these industries.

In order to reduce the oil content in the compressed air output from the air compressor, various filters and dryers are usually used for treatment. The lower the value of the residual oil content ppm, the higher the purity of the compressed air.