Micron Eagle  

Your Fluid Power Provider
Because we Care

FILTRATION TECHNOLOGY

Upon entering the Micron Finer system, oil will initially pass through a filter consisting of long strand, unprocessed cotton.

 

Why Cotton:

  • Unprocessed cotton provides an excellent filtration material and is the basis for the ability of the Micron Finer Systems to provide an absolute filtration capability of 1 micron.

Why 1 micron filtration:

  • Particulate size of less than one micron will not have an abrasive effect in oils.

  • Most quality engine oils will keep solid contaminants, such as sludge, in suspension to a particle size of 3-4 microns. When the particle size agglomerates to greater than this, the contaminant will fall out of suspension to be deposited in the sump or other areas of the equipment, which results in a detrimental effect on the quality of oil and performance of equipment.

Cotton - Background Information

 

Cotton is a from of natural fiber made predominantly from cellulose (approximately 90%). However, constituents are also present, which are critical to the function of the Micron Finer system. Cellulose itself is a polysaccharide consisting of long chains of carbohydrate repeat units.
Cotton is made up of the following constituents:

 
Constituent Proportion
Cellulose 85-90%
Water (absorbed) 6-8%
Protein, wax 2-8%
Other minerals (calcium, magnesium, etc..) 1%

 

Cellulose is the chief structural material of the vegetable world. The purest forms occur naturally in a fibrous state. The simplest fundamental cellulose repeat unit is:

 
Cellulose Molecule
 

 

Contaminants

 

Sulphur compounds typically occur in oil as a by-product of combustion in the form of sulphur dioxide (SO2) and sulphur trioxide (SO3). This is absorbed into the oil in gaseous form and is then converted to acid by reacting with water due to the heat and pressure of the equipment. Acids can then trigger polymerization of the oil or other forms of degradation. The polymerization will cause the oil to become much more viscous and thus its ability to shear and instantly flow will greatly diminish.

 

The Micron Finer systems can obviate this effect because:

 

  • Due to the heat and pressure generated by the equipment, sulphur dioxide will react with water contaminant in the oil to form sulphuric acid. Sulphuric acid in the oil will enter the Micron Finer filter and react with the protein and cellulose, causing protein and cellulose degradation by attacking the linkages, which in-turn retains the acid through the formation of the chemical bonds.

Cellulose Chain Breakdown


 
  • The acid can also cross-link the protein and cellulose chain.

 
Acid Triggered Crosslink

 

The presence of the water in the oil will convert virtually all sulphur dioxide/trioxide present into a chemically reactive entity (i.e. the acid), which will in turn react with the protein in the ways described above, thereby removing it from the oil and permanently holding it within the cotton. With the Micron Finer system the acid is retained in the filter chamber, thereby avoiding subsequent acid induced degradation of the oil in the equipment and damage to equipment components.