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ISO Standard 8573-1: Compressed Air Quality
ISO 8573-1 addresses compressed air quality in nine parts. Section 8573-1 classifies compressed air quality according to the maximum permissible impurity content per cubic meter and defines quality classes based on the presence of particles, moisture and oil.
Particle size and density
This standard establishes the methodology for determining the size and concentration of solid particles present in compressed air, ensuring precise control of the purity of the system.
To ensure the quality of compressed air, contaminating particles (water, oil and particles) must be removed, therefore it is essential to:
Incorporate suitable filters to remove particles and oil.
Use air dryers to reduce humidity.
Implement automatic drains to avoid water accumulation in the network
The ISO 8573-1 standard establishes different levels of compressed air quality depending on the amount of contaminants allowed:
Particle size and density
This standard establishes the methodology for determining the size and concentration of solid particles present in compressed air, ensuring precise control of the purity of the system.
To ensure the quality of compressed air, contaminating particles (water, oil and particles) must be removed, therefore it is essential to:
Incorporate suitable filters to remove particles and oil.
Use air dryers to reduce humidity.
Implement automatic drains to avoid water accumulation in the network
The ISO 8573-1 standard establishes different levels of compressed air quality depending on the amount of contaminants allowed:
| Class | Solid particles Maximum amount of particles per m³ | Humidity Pressure dew point (°C) | Residual oil content (Oil, aerosol, oil vapor) mg/m³ | ||
|---|---|---|---|---|---|
| 0.1 μm < d ≤ 0.5 μm | 0.5 μm < d ≤ 1.0 μm | 1.0 μm < d ≤ 5.0 μm | |||
| 0 | According to the specifications of the equipment manager or supplier, requirements stricter than class 1 | ||||
| 1 | ≤ 20 000 | ≤ 400 | ≤ 10 | ≤ -70 | ≤ 0,01 |
| 2 | ≤ 400 000 | ≤ 6 000 | ≤ 100 | ≤ -40 | ≤ 0,1 |
| 3 | ≤ 90 000 | ≤ 1 000 | ≤ -20 | ≤ 1 | |
| 4 | ≤ 10 000 | ≤ +3 | ≤ 5 | ||
| 5 | ≤ 100 000 | ≤ +7 | > 5 | ||
| 6 | ≤ +10 | ||||
Depending on the industrial application a class of a specific air quality is required. For example, pharmaceutical and electronics industries need class 1 or 2 air, while general processes may use class 3 or 4.
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