ISO 8573-1:2010 - Compressed air quality

ISO 8573 is an international standard for compressed air quality. Using the ISO 8573-1: 2015 table, the maximum level of the three main pollutants in the compressed air is specified. This is indicated by the following notation:

ISO 8574-1:2010 [A:B:C]

  • A: Purity classes for particles
  • B: Purity class moisture content and water
  • C: Purity class for total oil content

If one or two main pollutants are not defined, the respective value is replaced by a dash ISO 8573-1: 2010 [A: -: C]

If a required value is in class 0, the maximum permissible value must be specified as well. Class 0 defines values below class 1, for class 0 an oil-free compression is mandatory

 

ISO Table

Class Particals Moisture content and
water
Oil
0,1-0,5 µm 0,5-1 µm 1-5 µm
0          
1 ≤ 20.000 ≤ 400 ≤ 10 ≤ -70 °C ≤ 0,01 mg/m3
2 ≤ 400.000 ≤ 6.000 ≤ 100 ≤ -40 °C ≤ 0,1 mg/m3
3   ≤ 90.000 ≤ 1.000 ≤ -20 °C ≤ 1mg/m3
4     ≤ 10.000 ≤ +3 °C ≤ 5mg/m3
5     ≤ 100.000 ≤ +7 °C  
6 ≤ 5mg/m3 ≤ +10 °C  
7       ≤ 0,5 mg/m3  

Example:
ISO 8573-1:2010 : [1.2.1]

No more than 20,000 particles of size 0.1-0.5 microns.
Not more than 400 particles of size 0.5-1 microns.
Not more than 10 particles of size 1-5 microns.

Moisture content with a pressure dewpoint less than -40 ° C

Total oil content less than 0.01 mg / m3

 

Leakage in compressed air systems

Consumption and energy costs for leaks

Size mm Liter/Second kW Cost1 [EUR]
1 mm Loch 1 1 0,3 442
3 mm Loch 3 10 3,1 4.585
5 mm Loch 5 27 8,3 12.276
10 mm Loch 10 105 33,0 48.807

1: at 8700 operating hours with 0,17 EUR / kWh

Cost of compressed air

The costs for compressed air installations are distributed as a rule of thumb:

Energiekosten für Druckluft