en
Annex
Purity classes of the compressed air according to ISO 8573-1:2010
Class
Particles per m²
0.1.. – 0,5μm
[1.6, 9]
0
According to definition
and better than class 1
1
≤ 20.000
2
≤ 400.000
3
---
4
---
5
---
6
≤ 5 mg/m³
7
5 – 10 mg/m³
8
9
X
> 10 mg/m³
[1] – reference conditions 1 bar(a) and 20°C at 0% relative humidity
[2] – unless otherwise agreed or stated, reference conditions 7 bar and 20°C
[3] – measured according to ISO 8573-2 and ISO 8573-5
[4] – measured according to ISO 8573-2 ; measurement according to ISO 8573-5 optional
[5] – measured according to ISO 8573-3 and, if required, ISO 8573-9
[6] – measured according to ISO 8573-4
[7] – measured according to ISO 8573-8
[8] – measured according to ISO 8573-9
[9] – if particles greater than 5 µm have been measured, class 0-5 cannot be applied
[10] – liquid, aerosol and vapour oil content
0.5.. – 1μm
1.. – 5μm
[1.6, 9]
[1.6, 9]
≤ 400
≤ 10
≤ 6.000
≤ 100
≤ 90.000
≤ 1.000
---
≤ 10.000
---
≤ 100.000
[1,7]
[1,7]
[1,7]
Moisture content and
water
According to definition
and better than class 1
≤ -70°C
≤ -40°C
≤ -20°C
[2,5]
≤ +3°C
≤ +7°C
≤ +10°C
≤ 0,5 g/m³
0.5.. – 5 g/m³
[1,8]
5.. – 10 g/m³
> 10 g/m³
Complete oil [10]
According to definition
and better than class 1
≤ 0,01 mg/m³ [1,3]
≤ 0,1 mg/m³
≤ 1 mg/m³
[1,4]
≤ 5 mg/m³
> 5 mg/m³
[1,4]
15