2026-04-13Views：
The classification of compressed air water and oil free is usually based on ISO 8573-1 or other relevant industry standards. The following is a detailed analysis of the water and oil free grade of compressed air:
in the ISO 8573-1 standard, the oil-free level of compressed air is divided into several levels, of which Class 0 is the highest level of oil-free compressed air. Class 0 requires that the oil content in compressed air is less than 0.01 mg/m & sup3;, which 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. It should be noted that Class 0 is not completely oil-free, but contains very little oil to meet the strict requirements of specific industries.
for 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, pipeline blockage and other problems. Specific values may vary from application to application, but generally require humidity control at a low level. The ISO 8573-1 standard also classifies and defines the moisture content in compressed air, but the specific value needs to be determined according to the actual application scenario and requirements. In practical applications, the anhydrous standard usually evaluates the degree of dryness of compressed air by measuring its dew point temperature.
in some standards, the quality level of compressed air may be expressed by combining multiple parameters, such as solid particle size and concentration, water vapor content (expressed as pressure dew point), and total oil (including oil droplets, suspended particles, and oil vapor). These parameters correspond to different grades, and a comprehensive compressed air quality grade representation method can be formed by combining these grades. For example, in GB/T13277-1991 "General Compressed Air Quality Grade", the compressed air quality grade is represented by three Arabic numerals, which correspond to the grades of solid particles, water vapor content and oil content.
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. Different industries may have different quality requirements for compressed air, so it is necessary to select appropriate compressed air treatment equipment and process according to the actual situation to meet production needs.
In summary, the water-free and oil-free grade of compressed air is a comprehensive indicator, and specific grade requirements need to be determined according to relevant standards and actual application requirements. When selecting compressed air treatment equipment and process, factors such as production requirements, equipment performance and economic benefits should be fully considered.
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