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Quality of the compressed air for the pneumatic devices and circuits used in the railway rolling stock.
Norm for railway rolling stock
This norm is based on  ISO8573-1.
It defines the classes for air quality determination fro compressed air used on railway rolling stock and maintenance center.


 Table 1 sold particles classes(1)
class  
Maximum particles diameter (µm) mass (mg/m3)
1 0,1 0,1
2 1 1
3 5 5
4 15 8
5 40 10



 Table 2 humidity classes
class maximum pressurised Dew point 
 
1  -70
2 -40
3  -20
4 +3
5  +7
6 +10


 Table 3 Oil total classes (1)
class content in mg/m3
 
1 0,01
2 0,1
3  1
4  5
X 25
 (1): All values refer to :
  • Air temperature 20°C
  • Air absolute pressure 100 kPa = [1bar] (a)
The designation of the purity class of compressed air at the specified measuring point shall include the information in the order given :

                                                                                                         Point _(point ID)____ Air of quality class A B C     Where A = particles class, B = water class and  C = total oil class


If one pollutant is not expressed, it must be replaced by hyphen.

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