COMO Industrial - Solution Process

Filter Media Vs. Depth Efficiency
ISO Range Number Chart
Safety Data

ISO-4406:1987
Range Number Chart

Particles Concentration
(particles per milliliter)

Range Number

Example:

4550
180
15

Particles <2um
Particles <5um>2um
Particles >15um

Gives you an ISO cleanliness Level of 10/14/11

10,000,000
5,000,000
2,500,000
1,300,000
640,000
320,000
160,000
80,000
40,000
20,000
10,000
5,000
2,500
1,300
640
320
160
80
40
20
10
5
2.50
1.30
0.64
0.32
0.16
0.08
0.04
0.02
0.01
0.0050
0.0025

30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0.9
0.8
0.7

NOTE
If a cumulative particle count falls between two particles concentrations, the proper Range Number needed to formulate that portion of the ISO Contaminate Code is found opposite the higher particle concentration. For Example, if the number of particles per milliliter greater than 5 microns is 3000, the appropriate Range Number is 19; and similarly, if the particle concentration at 15 microns is 90, the corresponding Range Number is 14. Therefore, the ISO Solid Contaminate Code is 19/14.

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