The Ultimate Hydraulic Oil Cleanliness Standard Table | MachineMFG

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The Ultimate Hydraulic Oil Cleanliness Standard Table

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Hydraulic Oil Cleanliness: A Comparison Table of ISO Standards and NAS 1638 Standards

ISO CodeNAS 1638
19/1610
18/159
17/148
16/137
15/126
14/12 
14/115
13/104
12/93
11/82
10/8 
10/71
10/6 
9/60

ISO 4406 Cleanliness Standard

Particles > 5 μm, Particles > 15 μmISO Grade
100 CC Hydraulic Oil
 8,000,000 16,000,00024
 4,000,000 8,000,000 23
 2,000,0004,000,000 22
 1,000,0002,000,00021
500,000 1,000,000 20
 250,000 500,000 19
 130,000250,000 18
 64,000 130,000 17
 32,00064,000  16
 16,00032,000 15
 8,00016,00014
 4,0008,00013
 2,0004,000 12
 1,0002,000 11
 5001,000 10
 2505009
 1302508
641307
32646
16325
8164
483
242
121

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