April 2012

Fact:    Lubricating oil does not wear out and if kept clean will almost indefinitely maintain lubricating qualities intact. 

Fact:    High-efficiency, micro-fine oil filtration is essential for extending equipment life and oil change intervals.

Over the past decade the quality of filtration and oil additives have improved significantly; however, oil changes are still necessary because available full flow oil filters alone still cannot remove the fine contaminant.

A high-efficiency bypass oil filtration unit with replaceable filter element, like the one produced by Puradyn Filtration Technologies, can effectively address all forms of contaminant that occur in lubricating oils utilized in engines and/or hydraulic systems: 

Solid contaminants                  Wear metals, soot (carbon), dirt (silicon), sludge (glycol), etc.

Liquid contaminants               Water, etc.

Gaseous contaminants             Sulfur dioxide, sulfur trioxide, nitrous oxide, fuel vapors, etc.

Acidic contaminants                Sulfuric acid, nitric acid. (Typically present as a result of reaction between liquid and gaseous contaminants).

Most full flow filters filter out particles in the 20-40 micron range and most bypass filters, in the 1-3 micron range.  Unfortunately, this level of filtration will not significantly reduce wear. 

spec_TF240The best filters are designed to achieve needed ultrafine filtration down to below one micron. The combination of both types of filtration gives the maximum equipment protection.

What’s needed is a high-efficiency, bypass oil filtration system that addresses major issues that cause oil to lose its inherent characteristics to cool, lubricate and seal.  

Following is how these issues are solved:

Filtering solid contaminants to below one micron, incorporating a patented process for enhanced soot retention

Unprocessed cotton provides an excellent filtration material and is the basis for providing an absolute filtration capability of below 1 micron.  Particulate size of less than one micron will not have an abrasive effect on an engine or hydraulic oil.

According to SAE paper #660081, “Filtration of previously used oil to five microns had no significant effect on wear, but filtration to one micron had a substantial effect on wear.”

Using a specific kind of cotton media in the replacement filter, one that has traces of protein (?) as opposed to pure cellulose will react more readily with, acid contaminant described below.

Effectively removing sulfur oil impurities and acidic contaminant:

Sulfur compounds, in the form of sulfur dioxide (SO2) and sulfur trioxide (SO3), typically occur in oil as a by-product of combustion.  Sulfur dioxide, caused by heat and pressure generated by an internal combustion engine will react with water contaminant in oil to form sulfuric acid, which can then trigger various forms of oil degradation including polymerization, causing oil to become much more viscous, subsequently diminishing its ability to shear and instantly flow.

As noted, acid component contaminants are retained in the replaceable filter chamber, reacting with the protein and cellulose cotton media, avoiding acid-induced degradation of engine oil and damage to engine components. 

While this presents a solution to acid contamination in terms of maintaining alkali additive - calcium and magnesium - levels and the fundamental ability of the oil to flow and shear, it would be of even greater benefit if acid build up was prevented in the first place.

Effectively removing harmful gaseous and liquid contaminants through a heated evaporation chamber:

Water is often present in oil due to condensation or as a byproduct of combustion.  While it is logical to assume that the heat of a running engine will evaporate water, the evaporative process takes time when there is a large volume of oil relative to surface area.

With an effective filtration system, the opposite effect is achieved; i.e., a small volume of oil relative to surface area.  Known as the thin film evaporation effect, this process is critical to the performance of removing and preventing the formation of harmful contaminants.

In the system’s evaporation chamber, water and sulfur dioxide / trioxide will pass through the filter and flow over a heated diffuser plate.  This is where the thin film evaporation effect allows the release of both liquid (water) and gaseous (SO2 & SO3) contaminant.  Liquids and gases are evaporated by this process, thereby preventing the formation of sulfuric acid; the same will also apply to nitric or other acids that might be formed.  Additionally, alkali additives in engine oil will not be depleted and the condition of the oil will remain stable. 

Replenishing base additives using a time-released additive package to maintain oil’s proper viscosity and TBN (engines only).

Specifically formulated to maintain the oil’s total base number (TBN), this patented and proprietary package thoroughly blends oil additives with a low molecular weight polymer. The polymer, incorporated into the filter element, simply holds the additives until they are released.

The porous polymer is designed to expand and contract as the oil’s temperature rises, allowing additives to migrate to the surface where they are released into the oil.

Advanced Chemical Grafting Filtration Process

Filter elements contain media treated with an advanced process for chemical grafting (CGP™) designed to remove solid contaminants to less than one micron by chemically attracting and bonding them to the filter media. This advanced patent-pending filtration method was developed by Puradyn engineers as an effective way to remove the higher volumes and smaller particles of soot being generated by newer engines. These particles are too small to be adequately removed by traditional filtration media or centrifuge devices.

A Step-by-Step Illustration of the Process:

For more information, visit our website at www.puradyn.com

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