2026-04-13Views：
The standards for water-free and oil-free compressed air mainly involve the moisture and oil content in compressed air. These standards are essential to ensure the purity and applicability of compressed air. The following is a detailed analysis of the standard:
1. oil-free standard
1. ISO 8573-1 standard
Class 0: This is the highest level of oil-free compressed air, and the oil content is required to be less than 0.01 mg/m & sup3;. This level is usually suitable for industries that are extremely sensitive to oil pollution, such as food and beverage processing, pharmaceutical manufacturing, semiconductor production and optical instrument manufacturing. The Class 0 standard exceeds the conventional oil content classification (Class 1 to Class 4), meaning that the content of oil in compressed air is almost zero (source: Baijia).
Test methods: ISO 8573 specifies a variety of test methods, including partial flow (B2) test method and full flow (B1) test method, to fully evaluate the content of oil contaminants in compressed air.
2. Industry-specific standards
in the pharmaceutical industry, GMP standards require that the oil content of compressed air does not exceed 0.1 mg/m & sup3;.
Medical compressed air in the European Pharmacopoeia also stipulates that the oil content must be ≤ 0.1 mg/m & sup3;.
The standard of diving breathing compressed air in different countries is different, such as the United States and China require oil content <5 mg/m & sup3;, while the United Kingdom is <1 mg/m & sup3;.
2. Anhydrous Standard
regarding the anhydrous standard of compressed air, the humidity of compressed air is usually required to be lower than a certain level to prevent equipment corrosion and pipeline blockage. Specific values may vary from application to application, but generally require humidity control at a low level. It should be noted that the ISO 8573-1 standard also defines the classification and level of moisture content in compressed air, but the specific value may need to be determined according to the actual application scenario and requirements.
3. comprehensive application standard
in practical applications, the water-free and oil-free standard of compressed air needs to be determined according to specific industries, equipment and process requirements. For example, in the food, pharmaceutical and other industries, the purity of compressed air is extremely high, so it is necessary to strictly abide by the relevant standards to ensure that the moisture and oil content in the compressed air is controlled at a very low level.
4. inspection and maintenance
in order to ensure that the purity of compressed air meets the standard, regular testing and maintenance are required. This includes the use of professional testing equipment to monitor the moisture and oil content of compressed air, as well as regular maintenance of air compressors and post-processing equipment to ensure their normal operation and reduce the production of pollutants.
To sum up, the standard of water-free and oil-free compressed air involves many aspects, including oil content, moisture content and industry-specific requirements. In practical applications, it is necessary to consult and follow relevant standards and regulations according to specific conditions to ensure the purity and applicability of compressed air.
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