For Your Commercial, Industrial, Agricultural, and Marine Gasoline and Diesel Engines.

The AMSOIL / Dahl Fuel Filter / Water Separator Removes Fuel System Contaminants Along with Water

ATER and solid contaminants displace the fuel's lubricative coating on the high precision injection components. The loss of this protection results in wear, erosion, surface pitting, and eventual pressure loss.

Many existing fuel filters aren't designed to remove significant amounts of water. They are designed to do their job in a single step. This means they must be porous enough to allow sufficient flow volume, which limits filtering ability to between 10 and 30 microns. Any tighter filter media would plug too quickly and result in frequent element changes.

This system takes care of those shortcomings. AMSOIL/DAHL's functional dual chamber 3-stage fuel filter/water separators provide efficient suction side water separation and contaminant filtration. The key is the unique AMSOIL/DAHL patented depressurizer cone which spreads the flow of the fuel. With more area to flow over, greater separation of water and dirt from the fuel is achieved.

AMSOIL/DAHL fuel filter/water separators have less mechanical floe resistance than other separators, because the fuel changes direction only twice. The AMSOIL/DAHL unit removes virtually 100% of the water and contaminants.

1. The AMSOIL/DAHL system eliminates water from fuel before reaching the fuel pump and injectors. This prevents the major cause of fuel injection system failure.
   • It prolongs system life by eliminating pump and injector overhauls caused by water contaminated fuel. The cost of shop labor alone, just to repair the injection system on a six-cylinder rig, exceeds the cost of the AMSOIL/DAHL fuel filter/water separator.
   • It reduces the need to repair the fuel pump and/or injectors that could tie up equipment for one-to-two days. The loss of income in just a few hours of equipment downtime again would pay for an AMSOIL/DAHL fuel filter/water separator.
2. The AMSOIL/DAHL system separates solid contaminants from the fuel before reaching the fuel pump and injectors.
3. The AMSOIL/DAHL system is easily installed.
   • Install it at any location before the fuel pump. Complete installation instructions are included with each AMSOIL/DAHL unit.
   • This system can replace all other primary filters and water separators. It both filters and separates.
   • It takes minimal space to install. Clearance space for element removal is between 1 1/2 and 3 1/2 inches. Some models are installed with as few two easily accessed bolts.
4. The AMSOIL/DAHL system is easily serviced.
   • One model, the ADF20, is serviced by loosening the T-bolt handle. It also features a self-ejecting element.
   • The transparent bowl (up to 24 ounces water capacity) makes constant draining unnecessary. The draincock is easy to use.
5. Most of the solid contaminants are separated by the patented depressurizer cone in the bowl BEFORE reaching the filter element. Another factor in less frequent changes is the extra paper in the filter element. Under normal conditions, the element can last up to 40,000 miles.
6. The AMSOIL/DAHL system includes a reverse flow valve. This holds the prime in the fuel system by not allowing flow back to the tank during shut- down. A removable primer plug at the top assists where complete priming is required.
7. The AMSOIL/DAHL system helps eliminate air entrapment because the inlet and outlet ports are at the top of the unit. The fuel changes direction only twice, and so offers less mechanical resistance. Less resistance means longer pump and element life.

PROVEN PERFORMANCE in the laboratory and in millions of miles/hours of commercial and industrial operation. You can be sure that each AMSOIL/DAHL unit is designed right, built right, and does its job right.

MARINE DURABILITY is assured. Marine units ADF75, ADF11, and ADF21 have passed severe UL testing and are US Coast Guard accepted for Marine Applications.

CLEAN FUEL provided by an AMSOIL/DAHL fuel filter/water separator eliminates engine problems caused by water and solid contaminants in fuel. In addition, you can expect:

• Longer Injection System Component Life
• Full Power Performance
• Lower Element Replacement Cost

SUPERIOR ENGINEERING

• Die-cast aluminum
• Impact resistant large transparent bowl
• Element service life is several times longer than conventional filters
• Easy to install, service, and clean
• Positive air elimination
• Advanced spring design assures positive element seal
• Less mechanical resistance because of streamlined flow path
• Baffle system is designed to stop emulsification and disperse trapped air
• Ball check valve to stop reverse flow
• Five models specifically designed to fit engines of various capacities

• For Gasoline and Diesel Engines Up to 80HP (ADF-75)
• For Diesel and Marine Diesel Engines Up to 200HP (ADF-10, ADF-11)
• For Diesel and Marine Diesel Engines Up to 800HP (ADF-20, ADF-21)

How the AMSOIL Dahl System Works Contaminated fuel enters the inlet port. The T-Bolt redirects the fuel downward through the centerpipe. The fuel is directed down through the centertube. Fuel flows through the reverse flow valve As fuel is discharged from the depressurizer cone, 80 percent of the contaminants are separated from the fuel. Fuel rises upward and most of the solid contaminants and water settle into the bowl's quiet zone. As the fuel rises upward, any remaining small water droplets collect on cone, baffle and bowl surfaces. The size and weight of the droplets gradually increase causing the droplets to flow downward into the sump. Fuel is then filtered completely by the filter element. The clean fuel then continues up through the outlet port to the pump and injection system.