Oil cleanliness

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Contaminated Oil is the Cause Of 90% of all
Hydraulic Faults and Downtime.

Oil is at the heart of most manufacturing equipment. This oil needs to be kept in good condition free from the contamination of solid particles and water. Maintaining the oil in healthy condition is something that is often overlooked but will prevent costly downtime and the replacements of pumps, valves, cylinders and seals.

Good Filtration Reduces Bearing Wear

The wear of a bearing is related to the size of filtration as demonstrated in the graph above provided by SKF.

This is because the clearance protection filtration has a significant effect on bearing life. A study directed by Dr. P.B. Macpherson, United Kingdom, demonstrated the relationship between the control of clearance size particles and the relative fatigue life of rolling contact bearings. Tests on roller bearings showed that as the filter rating decreases from 40 Clm down to 3 Clm, bearing fatigue life increases exponentially.

Low Moisture levels Reduce Bearing Wear

The wear of a bearing is also related to the amount of moisture in the oil as demonstrated in the graph above provided by SKF.

One of the problems is that it is possible to lose up to 75 percent of their potential service life before the visible signs of water contamination cause the oil to become cloudy in appearance.

Free and emulsified water can cause contamination in critical fluids, resulting in additive depletion, oxidisation, bacterial growth, component wear and corrosion.

Contamination is an Integral Part of Every Hydraulic System.

Although new hydraulic oil looks clean it often contains more than 75,000 solid particles > 5 per 100ml. Moreover, new Pumps, valves, pipes, hoses, heat exchangers and oil tanks all bring dirt from the manufacturer. Added to this are the dirt particles from the surrounding air, entering through reservoir breathers and cylinders rod seals, add to the system's contamination load.

Condensation caused by changes in temperature and leaking oil cooling systems often contaminate the oil with water.

Reducing the Oxidation

A combination of relatively high temperatures, metal particles (which act as catalysts), water and oxygen will result in increased and accelerated oxidation of the oil.

During this complex process of oxidation, polymerisation causes sticky molecular structures, which we normally call "sludge". These resinous substances are dark in colour (one of the reasons why oil darkens after a period of time) and leave deposits on many parts of the hydraulic system, directly affecting the efficiency and the reliability of the system. Special filters as used by Oil Solutions in their service work are needed to remove these oxidised products.

Contact Oil solutions they have a solution for all your oil contamination problems