Appendix
Cleanliness codes according to SAE
Absolute particle count larger than a defined particle size
Example: cleanliness class to AS 4059:6
The maximum permissible particle count in the individual size ranges is bold-
faced in the above table.
Cleanliness class to AS 4059:6B
Size B particles may not exceed the maximum number indicated for code 6
6 B = max. 19,500 particles > 5 µm in size
Specifying a cleanliness code for each particle size
Example: cleanliness class to AS 4059:
7 A / 7 B / 6 C / 5 D
Cleanliness class
Particle count / 100 ml
Size A ( > 1 µm / > 4 µm
(c)
)
100,000
Size B ( > 5 µm / > 6 µm
(c)
)
38,900
Size C ( > 15 µm / > 14 µm
(c)
)
3460
Size D ( > 25 µm / > 21 µm
(c)
)
306
Specifying the highest cleanliness code measured
Example: Cleanliness code according to AS 4059 6 A – F
The 6 A – F specification requires a particle count in size ranges A – F.
The respective particle concentration of cleanliness code 6 may not be
exceeded in any of these ranges.
FCU 8111 /-Aviation
en(us)
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BEWA FCU8111 3690427a en-us 2017-01-23.doc
2017-01-23
