Tables - ISO 4406 / SAE AS 4059 / NAS 1638
HYDAC Filtersysteme GmbH
en
Page 89
BeWa CS1000 3247149l en.doc
2007-02-01
17.2.2 The SAE cleanliness classes can be represented as follows:
17.2.2.1 Absolute particle count larger than a defined particle size
Example: Cleanliness class according to AS 4059: 6
The maximum permissible particle count in the individual size ranges is shown in the table in boldface.
Cleanliness class according to AS 4059: 6 B
Size B particles may not exceed the maximum number indicated for class 6
6 B = max. 19,500 particles > 5 µm in size
17.2.2.2 Specifying a cleanliness class for each particle size
Example: Cleanliness class according to AS 4059: 7 B / 6 C / 5 D
Contamination level
Particle count / 100 ml
Size B ( >5 µm / > 6 µm(c))
38,900
Size C ( >15 µm / > 14 µm(c))
3460
Size B ( >25 µm / > 21 µm (c))
306
17.2.2.3 Specifying the highest cleanliness class measured
Example: Cleanliness class according to AS 4059: 6 B – F
The 6 B – F specification requires a particle count in size ranges B – F.
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