Functions and purpose of oil. Contaminations and consequences. Contaminations ISO code 4406. Criteria for Oil sampling reports.

1. Cleanliness of oil and Filtration
Contamination classes ISO 4406
Function and purpose of oil
Contaminations and consequences
Gears and rollers
Off-line filter systems

2. Contamination classes ISO 4406
Remark: each class doubles/halves the amount of particles.

3. Function and purpose of oil
•Transmitter (hydraulic pressure=energy)
• Lubrication (countering friction)
• Cooling (heat conveyor)
• Dispersion
(carrier of contaminations)
• Conservation
(preventing corrosion)

4. Contaminations and consequences
Contaminations: Consequences:
• Water (ingress, condensation, leakage) • Loss of lubricating ability
• Dirt (ingress, aeration) • Diminished dispersion
• Metals (wear and tear) • Isolation and sticking of
• Resin (thermal load) components
• Oxidation • Corrosion
(catalytic results of contaminations)

5. Criteria for oil sampling reports
•Viscosity (cSt = centiStoke)
• Water content (ppm: parts per million)
• T.A.N. (Total Acid Number)
• Contamination class acc. to ISO 4406:99
(particle counting of 4, 6 and 14 micron)
• Spectral analysis (e.g. additives in oil)
• Particle identification

6. Test membranes
Test membranes and
ISO code 4406.

7. Basic principle of gears
ExxonMobil: Mr. Per Holm> Gear seminar, Svendborg, May’02
high degree of sliding
at mesh exit
pure rolling only
on the pitch line
high degree of sliding
at start of mesh

8. Example of gear abrasion
Crest
Root
Abrasion of gear at the initial phase.

9. Bearings and rollers
Particles (2-5 micron) within
dynamic tolerance of a
mechanical part.
“Grinding” of particles on the
surfaces creating
micro-cracks and pitting,
which are then prone to
erosion.

10. Example of bearing abrasion(1)
Grinding of particles between components.

11. Example of bearing abrasion(2)

12. Filter fundamentals
‘In-line’: using the pressure or
flow of the system such as
suction-, pressure-, return- and
bypass filters.
‘Off-line’: from the tank through
the filter and back in the tank by
means of separate pump with
constant flow.

13. CJC Filter systems
TM
Specifications and strong points:
1. Filter pore size of 0.85 micron.
2. Large contaminations holding capacity, for example B 27/27 holds
upto 2 litres of water and 4 litres of particles.
3. The cellulose material adsorbs resins.
4. Several separation technologies: Absorption, Separator-coalescing,
Vacuum and Desorption (extraction).
5. World wide service, establishment and distributors (www.cjc.dk).
6. Established goodwill, knowledge and experience in oil filtration.
7. Specialized in ‘off-line’ systems.
8. Reliable and users friendly.

14. CJC Filter units
CJC FineFilter HDU 27/54 GP-EPT
CJC FineFilter
HDU 27/27 P-EM
CJC FineFilter HDU 27/27 P
CJC FilterSeparator PTU2 27/27 PV-EPW
CJC VacuumFilter V30 CJC Desorber D38
CJC FineFilter HDU 15/25 PV