AIR QUALITY STANDARDS
ISO8573-1 (2001) - Compressed Air
Standards
The following table shows all of the classes
within ISO8573-1 (2001). To choose which class meets your requirements, assess what
dewpoint you need, the permissible remaining levels of oil and remaining dirt
particles.
ISO8573-1 (2001) Class 1-4-1 for example would be a refrigeration dryer with
a high quality coalescing filter.
QualityClass |
Particle Size in Microns |
Pressure Dewpoint |
Oil Content |
Recommended dryer to meet ISO Standard |
0 |
0.1 |
-70°C |
More
stringent than Class 1 |
Desiccant |
1 |
0.1 |
-70°C |
0.01 Mg/m³ |
Desiccant |
2 |
1 |
-40°C |
0.01 Mg/m³ |
Desiccant or membrane |
3 |
5 |
-20°C |
1 Mg/m³ |
Desiccant or membrane |
4 |
15 |
+ 3 °C |
5 Mg/m³ |
Refrigerated or membrane |
5 |
40 |
+ 7 °C |
25 Mg/m³ |
High Inlet Temp. Dryer |
6 |
- |
+ 10 °C |
- |
High Inlet Temp. Dryer |
|
