Full flow filter rates can range between 60 to 1,000 gallons per hour, which is more like screening than filtering. The purdyn eystem has an ultra-fine filtration filter that filters oil at between 6 to 8 gallons per hour. In order to achieve ultra-fine filtration it is necessary to pass the oil through the filter slowly. Full flow filters strain out mostly large solid particles (15 microns or larger), leaving many smaller highly abrasive particles in the oil. The Puradyn system filters solid contaminants down to 1 micron in size while evaporating liquid contaminants such as fuel, water and engine coolant in the electrically heated evaporation chamber.

Yes! Most full flow and bypass filters use paper filter cartridges, and of those, only premium quality filters remove solid contaminants down to about 15 microns in size. Most full flow filters can capture particulates in the range of 25 to 40 microns. Commonly, paper is used as a full flow filter medium but it can quickly coat with particles, dirt, sludge and varnish. There is far less filtering surface area in a full flow paper filter than in the purdyn system and as such, they have a definite tendency to clog and lose their efficiency quickly. In the event that a full flow paper filter is heavily clogged, the filter's bypass valve should open, allowing unfiltered oil to flow through the engine. Thus, the full flow oil filter can become ineffective in a relatively short period.

Oil would not become contaminated with acids (generally caused by water joining with sulfur oxides) or have its viscosity altered by fuel dilution if engine heat alone could do the job of removing unwanted liquids. The purdyn system's evaporation chamber provides the necessary combination of controlled heat, low humidity, lack of pressure, and thin filming of oil to allow water, engine coolant and fuel to vaporize quickly and efficiently directly into the atmosphere before these liquids can re-condense, as would normally occur within an engine not equipped with the purdyn system.

Yes! This can best be described with the example of sulfuric acid. Sulfur oxide is produced in the engine as a by-product of combustion. Water is also formed as a by-product of combustion and occurs in the engine as condensation. If these two substances react in the heat and pressure of the engine, sulfuric acid will form. Cotton in the purdyn system filter element acts to neutralize this acid by removing the sulfur oxide from the oil. The purdyn system removes water and vents it to atmosphere as the oil passes through the heated evaporation chamber. Prevention of sulfuric acid also contributes to longer oil additive life.

Any high quality oil, including synthetic, with a Total Base Number (TBN) that meets or exceeds the specifications established or recommended by the engine manufacturer.

Yes! The purdyn system is completely compatible with synthetic oils. Although these oils provide superior lubrication versus mineral oils, they are still susceptible to solid contaminant buildup and liquid contamination, such as water and engine coolant from leaking gaskets or water from crankcase condensation, as well as fuel dilution and other foreign matter entering the oil. The purdyn system allows for the use of expensive synthetic oil in a more cost-effective manner through greatly extended oil drain intervals.

No! Detergent oil will turn very dark, almost black in color after it is heated. Non-detergent oil will turn a reddish brown after it is heated. Most diesel engine lubrication oil will turn black in the first few minutes of operation due to the additive package in the oil and minute carbon particles. The only accurate way to determine the oil's lubricating value or contamination level is through spectrographic oil analysis..

No! It should only take a few minutes. On the TF models, loosen four nuts and swing studs down. Move the head casting aside and remove the diffuser plate. Remove and discard head casting rubber gasket. Remove and discard the old filter and rubber o-ring. Install the new filter. Install the new rubber o-ring on top of the new filter. Install the diffuser plate. Install the new head gasket into the head casting. Place the head casting over the diffuser plate, move swing studs up and equally tighten four nuts.

On PFT models, using a 1/2" flex drive handle, loosen the lid by turning counterclockwise and remove. Remove and discard the old filter. Install new filter. Install the lid and using a 1/2" flex drive handle, tighten lid turning clockwise.

The purdyn system heating element is constructed of non-corroding stainless steel. The heating element is isolated in a sealed compartment and never comes in contact with the oil or potentially volatile fumes within the evaporation chamber. The heating element is sealed to prevent fire, explosion and to keep out moisture. This quality component should operate more than 10 years.

Yes! purdyn systems are solidly designed, constructed of quality components, virtually indestructible, trouble-free, have no moving parts and require no servicing or adjusting.

Yes! The purdyn system has a two-year, unlimited mileage/unlimited hours warranty.

• Reduced volumes of purchased and stored new oil.

• Reduced waste oil disposal costs and associated impacts to the environment.

Pollution is one of the most serious problems facing the world today with further governmental regulatory rules expected to increase oil change costs in the future. By using the purdyn system, your problems of used oil storage, disposal and related costs are significantly reduced. Also, the purdyn system filter can be disposed of as would your OEM full flow filters, according to your State guidelines.