AirDog® Diesel – We Know Diesel Engines

In 1990, Charles “Charlie” Ekstam began research to solve a problem that has plagued diesel engines since their inception: the introduction of air and vapor into fuel, most typically caused by fuel sloshing in the tank during normal vehicle operations. When air bubbles and vapor are present in the fuel, the injection is delayed until the air and vapor are compressed to the required pressure. The result is delayed injection timing, which causes increased fuel consumption, lower power output, increased exhaust emissions, and can also lead to premature failure of the fuel injectors.

By 1993, Charlie solved the problem of entrained air in fuel with the development of the world’s first fuel air separation system for diesel engines, trademarked as the Fuel Preporator®. From that invention, he and his wife, Dora Serrano, co-founded the business known today as PureFlow™ Technologies Inc., a woman-owned, minority-owned, company that now offers a full array of fuel air separation systems for most makes and models of commercial, industrial, and heavy duty diesel engines.

Today, PureFlow™ Technologies Inc. has a complete line of diesel fuel systems, manufactured in the United States, that are specifically engineered for most popular diesel engines. Our products are designed to reduce the infusion of air and vapor into the engine, increase performance by optimizing injection timing, improve fuel mileage, as well as protect the life and integrity of fuel injectors.

Dora and Charlie - AirDog History

What makes us the top dog?

PureFlow Technologies began developing the world’s first diesel fuel air separation system in 1990.
For the past 30+ years, we have focused on research and development of our product, to ensure that we are delivering the most reliable and effective fuel systems available on the market today for heavy duty diesel engines.

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US

Our system returns just enough fuel to remove the air from the engine supply line. This is key for ease of installation. Our return line routed through the existing engine return line, before the splitter valve, eliminating the need for a return line ran back to both fuel tanks. The remaining fuel is recirculated through the particulate filter until needed by the engine.

THEM

Large volume return requires a separate return line to be ran back to the fuel tank/tanks, making installation more difficult and time consuming. This technology was used in our first generation system. My how times have changed!

US

We balance the Gerotor by feeding both sides of the Gerotor with fuel, and we ensure a long lasting pump with a bearing on each side of the Gerotor to greatly reduce wear.

THEM

Fuel is only fed into one side of the Gerotor, thus pushing the Gerotor against the outside of the Gerotor housing, causing excess wear and pump drag, resulting in premature pump failure.

US

We incorporate a Lovejoy Fitting between the electric motor and the Gerotor pump, thus ensuring proper alignment of the pump and electric motor shafts. This feature greatly increases the life expectancy of the electric motor.

THEM

No Lovejoy Fitting, creating issues with shaft alignment. This results in premature electric motor failure.

US

All of our AirDog fuel systems come standard with an adjustable pressure regulator.

THEM

Check ball and spring. We used this 20+ years ago on our first systems.

US

Our AirDog system has a second phase of air separation that is lacking in our competitor’s product. Any air that is not diverted out of the fuel by the flow dividers is caught and removed through our primary air/vapor discharge port.

THEM

Single stage of air separation requires the bubbles to rise to the top and exit before being flushed through with the fuel to the injectors, resulting in incomplete air/fuel separation. Similar to our first generation technology… 20+ years ago.

US

We have eliminated the need for an electric motor and Gerotor pump. Diesel engines that have adequate transfer pumps do not need the additional electric motor and pump to achieve air separation. Super quick installation and half the expense, with no moving parts.

THEM

Oh come on, man…This just isn’t fair!