Oil content grade of compressed air

The oil content of compressed air can be divided according to different standards, including international standard ISO8573, European standard DINISO8573 and other application-specific standards. The following are the oil content levels of compressed air according to these standards:

according to ISO8573 standards:

grade 1: Oil content less than 0.01 mg/m & sup3;, filtration efficiency> 99.9999%.

Grade 2: Oil content less than 0.1 mg/m & sup3;, filtration efficiency> 99.999%.

Grade 3: Oil content less than 1 mg/m & sup3;, filtration efficiency> 99.99%.

Grade 4: Oil content less than 5 mg/m & sup3;, filtration efficiency> 99.9%.

Grade 5: oil content less than 25 mg/m & sup3;, filtration efficiency> 99%.

Grade 6: oil content less than 100 mg/m & sup3;, filtration efficiency> 98%.

In addition, there is a higher oil-free compressed air standard, namely Class 0, which requires an oil content of less than 0.01 mg/m & sup3;, which is usually regarded as equivalent to the oil content grade of oil-free compressed air.

According to application-specific criteria:

chinese Pharmacopoeia and GMP standard: the oil content of compressed air is required to be less than or equal to 0.1 mg/m & sup3;. This standard is drawn from the provisions of the European Pharmacopoeia, which stipulates that the oil content of medical compressed air must be less than or equal to 0.1 mg/m & sup3;.

Diving breathing compressed air standards: oil content <5 mg/m & sup3; in the United States and China, and <1 mg/m & sup3; in the United Kingdom;.

In general, the oil content of compressed air varies according to the application field and industry, and different applications require different levels of oil content standards. In order to ensure that the oil content of the compressed air meets the standard, some air compressor manufacturers will be equipped with high-efficiency oil and gas separators and air filters to further reduce the oil content in the compressed air. At the same time, regular maintenance and inspection is also an important measure to ensure the quality of compressed air.