Filtration

in compliance with Purity Class acc. to DIN ISO 4406

Impurities in oil is one of the biggest risk factors.
The general assessment of the whole plant – with regard to efficiency, reliability, low maintenance costs and high machine availability – is mainly influenced by having high-quality components, including lubricants and hydraulic media.

If these, usually highly priced, components are damaged by solid contaminants in the hydraulic and lubricating media, this can cause plant disturbance even as far as undesired, sudden and unforeseeable plant standstill.

If the concentration of solid contaminants in lubrication and hydraulic media is noticeably reduced, it can prevent premature component failure.

A low solid concentration in the individual particle sizes for lubrication and hydraulic media ensures that the system works in an economically reliable manner  for a long time. The purity of lubrication and hydraulic media is determined according to DIN ISO 4406 (1999). 

Examples of standard purity classes are:

  • Gear oil  16-14-11
  • Hydraulic oil    15-13-10

If desired, all lubricants can be pre-filtered in accordance with DIN ISO 4406 prior to delivery.

  • Purity Classes acc. to ISO 4406

    Number of particles per 100 ml

    Ordinal number

    More than

    Up to and including

    250.000.000

     

    > 28

    130.000.000

    250.000.000

    28

    64.000.000

    130.000.000

    27

    32.000.000

    64.000.000

    26

    16.000.000

    32.000.000

    25

    8.000.000

    16.000.000

    24

    4.000.000

    8.000.000

    23

    2.000.000

    4.000.000

    22

    1.000.000

    2.000.000

    21

    500.000

    1.000.000

    20

    250.000

    500.000

    19

    130.000

    250.000

    18

    64.000

    130.000

    17

    32.000

    64.000

    16

    16.000

    32.000

    15

    8.000

    16.000

    14

    4.000

    8.000

    13

    2.000

    4.000

    12

    1.000

    2.000

    11

    500

    1.000

    10

    250

    500

    9

    130

    250

    8

    64

    130

    7

    32

    64

    6

    16

    32

    5

    8

    16

    4

    4

    8

    3

    2

    4

    2

    1

    2

    1

    0

    1

    0

  • Example

    16 - 14 - 11

     

    Particle >4μ

     

    More than

    Up to and including

     

    32.000

    64.000

    16

     

     

    Particle >6μ

     

    More than

    Up to and including

     

    8.000

    16.000

    14

     

     

    Particle >14μ

     

    More than

    Up to and including

     

    1.000

    2.000

    11