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The
AMSOIL Dahl Fuel Filter/Water Separator removes water and solid contaminants from
fuel before it reaches the fuel pump and injection system. Water
and solid contaminants reduce the effectiveness of fuel's lubricative coating
on high precision injection components. If this protection continues to decrease,
the results can include wear, erosion, surface pitting and eventual ly loss of
pressure. Many existing fuel filters are not designed to remove
significant amounts of water. They are designed to simply filter in only one step.
To accomplish this, they must be porous enough to allow a sufficient volume of
flow. This limits its filtering ability to between only 10 and 30 microns. Using
a tighter media would plug up too quickly and the filter would need frequent element
changes. The AMSOIL Dahl system has none of these shortcomings.
Its dual chamber 3-stage fuel filter/water separators provide efficient water
separation and contaminant filtration. The unique patented depressurizer cone
spreads the flow of the fuel. With more area to flow over, there is greater separation
of water and dirt from the fuel. The AMSOIL Dahl system has less
mechanical flow resistance than other separators, because the fuel only changes
direction twice. The AMSOIL Dahl system removes virtually 100 percent of the water
and most of the solid contaminants in the fuel. The AMSOIL Dahl
system prolongs system life by eliminating pump and injector overhauls caused
by water-contaminated fuel. It also reduces downtime spent repairing the fuel
pump and injection system. The loss of income from only a few hours of downtime
is greater than the cost of an AMSOIL Dahl system. The AMSOIL Dahl
system includes a reverse flow valve that holds the prime in the fuel system by
not allowing flow back to the tank during shut down. It also helps eliminate air
entrapment because the inlet and outlet ports are at the top of the unit. The
fuel changes direction only twice, creating less flow resistance and allowing
longer pump and element life. Most solid contaminants are removed
by the depressurizer cone in the bowl before reaching the filter element, which
has extra media. These characteristics allow the element to last up to 40,000
miles under normal conditions.
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| How the AMSOIL Dahl System
Works | | 1. | Contaminated
fuel enters the inlet port. | | 2. | The
fuel is directed down through the centertube. |
| 3. | Fuel flows through the reverse flow valve. |
| 4. | 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. |
| 5. | 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. |
| 6. | 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. |
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