ISO Codes
- and Standards
ISO Solid Contamination Code
Session Objectives

Understanding the Need for a Rating System

Understanding ISO Ratings

Determination of a System’s Cleanliness Level

Recommending Cleanliness Levels
Cl
Cleanliness
li
L
Levell R
Rating
ti

Needed to be Established to Better Satisfy
Industry Needs
–
–

To Accurately Determine How Much Particulate is in
a System
To Provide a Basis for Selecting Optimum
Contamination Control for any System
Was Established by the International
Standards Organization (ISO)
–
Identified
Id
tifi d as the
th ISO Solid
S lid C
Contamination
t i ti C
Code
d
(ISO Standard No. 4406:1999)
ISO 4406: Allocation of Scale
Numbers
ISO Cleanliness Standard 4406
No. of Particles per 100 ml of Fluid
More than Up to and Including
8,000,000
16,000,000
4,000,000
8,000,000
2,000,000
4,000,000
1,000,000
2,000,000
500,000
1,000,000
250,000
500,000
130,000
250,000
64 000
64,000
130 000
130,000
32,000
64,000
16,000
32,000
8 000
8,000
16 000
16,000
4,000
8,000
ISO
Range
Number
24
23
22
21
20
19
18
17
16
15
14
13
No. of Particles per 100 ml of Fluid
More than
2,000
1,000
500
250
130
64
32
16
8
4
2
1
Up to and Including
4,000
2,000
1,000
500
250
130
64
32
16
8
4
2
ISO
Range
Number
12
11
10
9
8
7
6
5
4
3
2
1
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ISO Contamination
C t i ti Level
L
l Code
C d
Based on Amount of Contaminant in 100 ml of Fluid Sample
in Three Size Ranges
Number of Particles  4(c) Microns in Size
Number of Particles  6(c) Microns in Size
Number of Particles  14(c) Microns in Size
ISO 4406 – Graph of Code Number
Source:
Figure A.1
ISO 4406: 1999
Sample Size
Sample Size = 100
Milliliters of Fluid
Determining the ISO Rating
Example:
p
If a Fluid Having:
Particles  4(c) Microns
–22,000
22 000 Particles  6(c) Microns
– 3,000 Particles  14(c) Microns
–70,000
The Corresponding ISO Rating is 17/15/12
Determining the ISO Rating of a Fluid
Sample Fluid
(100 ml)
Particle Size No. of Particles
>4 µ
70,000
>6 µ
22,000
>14 µ
3 000
3,000
>20 µ
600
>30 µ
130
If Particle Count
Falls Between:
Range
No. is:*
64,000 - 130,000
17
16,000
,
-32,000
,
15
2,000 - 4,000
12
*S
*Source:
ISO/DIS 4406
The Sample Fluid is
This presentation is property of Schroeder Industries LLC and can not be used without express permission.
ISO 17/15/12
How do we measure fluid
contamination?
Structure of ISO
ISO-Code:
Code:
amount of dirt particles
in a 100 ml sample
larger than these specified sizes:
4µm / 6µm / 14µm
22
E
Example:
l
larger than 4µm = 2,234,000
This
presentation
Industries
LLC and can not be used without express permission.
22 / of Schroeder
ISO
Code is= property
/
/
How do we measure fluid
contamination?
Structure of ISO
ISO-Code:
Code:
amount of dirt particles
in a 100 ml sample
larger than these specified sizes:
4µm / 6µm / 14µm
22
18
E
Example:
l
larger than 4µm = 2,234,000
larger than 6µm = 172
172,000
000
This
presentation
Schroeder
Industries LLC and can not be used without express permission.
22 / of18
ISO
Code is= property
/
How do we measure fluid
contamination?
Structure of ISO
ISO-Code:
Code:
amount of dirt particles
in a 100 ml sample
larger than these specified sizes:
4µm / 6µm / 14µm
E
Example:
l
22
18
13
larger than 4µm = 2,234,000
larger than 6µm = 172
172,000
000
larger than 14µm = 4,250
This
presentation
Schroeder
22 / of18
ISO
Code is= property
/ 13 Industries LLC and can not be used without express permission.
How do we measure fluid contamination?
Structure of ISO
ISO-Code:
Code:
amount of dirt particles
in a 100 ml sample
larger than these specified sizes:
4µm / 6µm / 14µm
E
Example:
l
22
18
13
larger than 4µm = 2,234,000
larger than 6µm = 172
172,000
000
larger than 14µm = 4,250
This
presentation
Schroeder
22 / of18
ISO
Code is= property
/ 13 Industries LLC and can not be used without express permission.
How Do We Measure Fluid Contamination?
Structure of NAS 1638
Class
5-15
5
15 µm
15-25
15
25 µm
25-50
25
50 µm
50-100
50
100 µm
> µm
00
125
22
4
1
0
0
250
44
8
2
0
1
500
89
16
3
1
2
1000
178
32
6
1
3
2000
356
63
11
2
4
4000
712
126
22
4
5
8000
1425
253
45
8
6
16000
2850
506
90
16
7
32000
5700
1012
180
32
8
64000
11400
2025
360
64
9
128000
22800
4050
720
128
10
256000
45600
8100
1440
256
11
51200
91200
16200
2880
512
12
1024000
182400
32400
5760
1024
max. amount of dirt particles in 100ml at given size
New Oil Classifications
ISO 16/14/11
ISO 17/15/13
Demanded by
y
Modern Hydraulic
Systems
New Oil as
Delivered in Minicontainer
ISO 20/18/15
ISO 23/21/18
New Oil as
D li
Delivered
d iin
Tanker
New Oil as
Delivered in
Barrels
Controlling Water Content Saves Money!
120
Be
earing Life
100
80
60
40
20
0
Source: Machine Design, “How dirt and
water effect bearing life“, July 1996
ppm of water in oil
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Required New Machine Cleanliness
Fluid Cleanliness
C
& Service
S
Life
f
Current
Target
Target
Target
Target
22/19
19/16
18/15
17/14
16/13
21/18
18/15
17/14
16/13
15/12
20/17
17/14
16/13
15/12
14/11
19/16
16/13
15/12
14/11
13/10
18/15
15/12
14/11
13/10
12/9
17/14
14/11
13/10
12/9
12/8
2X
3X
4X
5X
Cleanliness
Life Ext.
Factor
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ISO Cleanliness Level Correlation Table
ISO
Code
Mil Std
1638
(1967)
Mil Std
1246A
(1967)
ACFTD
Gravimetric
Level –
mg/L
Disavowed
SAE
Level
21/19/16
10
20/18/15
9
6
19/17/14
8
300
5
18/16/13
7
1
4
17/15/12
6
3
16/14/12
200
16/14/11
5
2
15/13/10
4
.1
1
14/12/9
3
0
13/11/8
2
12/10/8
100
12/10/7
1
12/10/6
.01
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11/9/6
0
Recommended Cleanliness Levels
ISO Codes for Fluid Power Components
Component
Gear Pump
Piston Pump/Motor
Vane Pump
Directional Control Valve
Proportional Control Valve
Journal Bearings
Servo Valve
New/Unused Oil
Cleanliness Level (ISO Code)
19/17/14
18/16/13
19/17/14
19/17/14
18/16/13
17/15/13
16/14/11
20/18/15
Cleanliness Levels Based on Pressure
System Type
Recommended
Cleanliness Levels
(ISO Code)
Low Pressure – manual
control
20/18/15 or better
Low to Medium Pressure –
electro-hydraulic controls
19/17/14 or better
High pressure - servocontrolled
16/14/111 or better
Recommended
R
d d Media
M di to
t Achieve
A hi
Desired
D i d
Cleanliness Based on Rate of Ingression
g
Desired ISO Level
Ingression Rate
Element Medium
20/18/15
High
Z25
19/17/14
Low
Z25
19/17/14
High
Z10
18/16/13
Low
Z10
18/16/13
High
Z5
15/13/10
Low
Z5
18/16/13
g
High
Z3
15/13/10
Low
Z3
15/13/10
g
High
Z1
14/12/9
Low
Z1
This presentation is property of Schroeder Industries LLC and can not be used without express permission.
Series “Z” Media Elements
ISO
Cleanliness
L
Level
l
Schroeder
Element
M di
Media
20/18/15 – 19/17/14
Z25
19/17/14 – 18/16/13
Z10
18/16/13 – 15/13/10
Z5
15/13/10 – 14/12/9
Z3
14/12/9 – 13/11/8
Z1
ISO Cleanliness Levels
Cleanliness Code Chart
25
160000
24
80000
23
40000
22
20000
21
10000
20
5000
19
2500
18
1300
17
640
16
320
15
160
14
80
13
40
12
20
11
10
10
5
9
2.5
8
1.3
7
.60
6
.30
5
.15
4
.08
3
.04
2
.02
1
Cleanliness Code
20,000
15,000
10,000
5,000
4,000
3,000
2,000
1,500
1000
500
400
300
200
150
100
50
40
30
20
15
10
5
4
3
2
1.5
1
.5
.4
.3
.2
.15
.1
.01
1
2
4
5
6
10
15
14
20
25
Particle Size in Micrometers
NEW SCALE
OLD SCALE
30 35
40
45
50
Number of Partiicles Greater Th
han Size Per Milliliter
20 14 12
100,000
50,000
40,000
30,000
Catalog Data
Our current catalog shows Beta Ratios using
b th the
both
th old
ld and
d the
th new information.
i f
ti
This allows direct comparisons with
competitors whether they are showing
efficiency based on new or old standards.
See catalog for example.