Appendix D
44
SAE AS4059 REV.E Cleanliness Classification For . . .
SAE AS4059 REV.E Cleanliness
Classification For Hydraulic Fluids
This SAE Aerospace Standard (AS) defines cleanliness levels for particulate cont-
amination of hydraulic fluids and includes methods of reporting data relating to the
contamination levels. Tables 1 and 2 below provide the Maximum Contamination
Limits (Particles/100ml) of differential and cumulative particle counts respectively
for counts obtained by an automatic particle counter, e.g. PML².
Size range μm(c):
6 - 14
14 - 21 21 - 38 38 - 70
>70
Class
00
125
22
4
1
0
0
250
44
8
2
0
1
500
89
16
3
1
2
1,000
178
32
6
1
3
2,000
356
63
11
2
4
4,000
712
126
22
4
5
8,000
1,425
253
45
8
6
16,000
2,850
506
90
16
7
32,000
5.700
1,012
180
32
8
64,000
11,400
2,025
360
64
9
128,000
22,800
4,050
720
128
10
256,000
45,600
8,100
1,440
256
11
512,000
91,200
16,200
2,880
512
12 1,024,000 182,400
32,400
5,760 1,024
Table I
AS4059E Table 1
- Cleanliness Classes for Differen-
tial Particle Counts
The information reproduced on this and the previous page is a brief extract from SAE AS4059 Rev.E,
revised in May 2005. For further details and explanations refer to the full Standard.
Summary of Contents for PML2
Page 1: ...PML Analyser UserGuide 200 052 EN www mpfiltri co uk ...
Page 6: ...6 Introduction Figure 1 ...
Page 38: ...38 Warranty ...
Page 62: ...Appendix K 62 Fault Finding ...
