Iso 4406 And Sae As 4059 Classes; Iso 4406:1999; Iso 4406 Table - HYDAC International ContaminationSensor CS 1000 Serie Betriebs- Und Wartungsanleitung

14

ISO 4406 and SAE AS 4059 Classes

14.1

ISO 4406:1999

In ISO 4406 particle counts are determined cumulatively, i.e. > 4 µm(c), >6 µm(c) and
>14 µm (c) (manually by filtering the fluid trough an automatically using particle counters)
and allocated to measurement references.
The goal of allocating particle counts to references is to facilitate the assessment of fluid
cleanliness ratings.
In 1999 the "old" ISO 4406 was revised and the size ranges of the particle sizes undergoing
analysis redefined. The counting method and calibration were also changed.
This is important for the user in his everyday work:
Even thought the measurement references of the particles undergoing analysis have
changed, the cleanliness code will change only in individual cases. When drafting the "new"
ISO 4406 it was ensured that not all the existing cleanliness provisions for systems had to be
changed.

ISO 4406 table

14.1.1
Allocation of particle counts to cleanliness classes:
Particle count /
100 ml
Class More than Up to (and including)
0 0
1 1
2 2
4
3
4 8
5 16
6 32
64
7
8 130
9 250
10 500
11 1,000
12 2,000
13 4,000
14 8,000
HYDAC Filtertechnik GmbH
BeWa CS1000 3247149-02j en.doc
All manuals and user guides at all-guides.com
Class
1
2
4
8
16
32
64
130
250
500
1,000
2,000
4,000
8,000
16,000
en
Tables - ISO 4406 / SAE AS 4059
Particle count /
100 ml
More than Up to (and including)
15 16,000
16 32,000
17 64,000
130,000
18
19 250,000
20 500,000
21 1,000,000
2,000,000
22
23 4,000,000
24 8,000,000
25 16,000,000
26 32,000,000
27 64,000,000
28 130,000,000
32,000
64,000
130,000
250,000
500,000
1,000,000
2,000,000
4,000,000
8,000,000
16,000,000
32,000,000
64,000,000
130,000,000
250,000,000
Page 127
2005-10-12