Compressed Air Purity Class
Though a purity class is specified as ISO 8573-1 (1991) / JIS B 8392-1, the target is general compressed air for industrial use and it is not prescribed for directly breathing in or for medical use.
※(注記) The current revised standard is ISO 8573 (2001) / JIS B 8392-1 (2003).
ISO 8573-1 (1991) / JIS B 8392-1 (2000) Contaminants and Purity Classes
|
Purity Class |
Solid Particle Size [µm] |
Water Content Pressure Dew Point (°C) <Atmospheric Pressure Dew Point (°C)> Pressure: 0.69 MPa |
Remaining Oil Content [mg/m3] (wt ppm) |
|---|---|---|---|
| 1 | 0.1 | -70 <-83> | 0.01 (0.01) |
| 2 | 1 | -40 <-58> | 0.1 (0.08) |
| 3 | 5 | -20 <-42> | 1 (0.83) |
| 4 | 15 | +3 <-23> | 5 (4.2) |
| 5 | 40 | +7 <-19> | 25 (20.8) |
| 6 | - | +10 <-17> | - |
| 7 | - | Not Defined | - |