IFM Electronic AC5270 Notice D'utilisation page 14

Specification of the compressed air purity
According to ISO 8573-1: 2001 the air purity is divided into three classes:
1. The purity class of the solid particle content
2. The purity class for the humidity content
3. The purity class for the total oil content
The AirBoxes are suitable for non-lubricated compressed air of the
purity classes 6- 3- 1 and for lubricated compressed air of the purity
classes 6-3-4.
Meaning:
1. Solid particle contamination according to class 6:
Max. particle size 5 µm, max. particle density 5 mg / m
2. Maximum water content according to class 3:
Pressure dew point -20°C
3. Maximum total oil content according to class 1:
for non-lubricated compressed air 0.01 mg / m
Maximum total oil content according to class 4:
for lubricated compressed air < 5 mg / m
to approx. 1 oil drop / 4000 litres of air
Once the AirBox has been operated with lubricated air, it always has to
be operated with lubricated air as the oil removes the initial lubrica-
tion.
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