|From the inlet port, fuel flows through the interior vane system which imparts
a circular motion to the fuel.
|Still in the circular motion fuel reaches the bowl section, where, due
to this centrifugal motion water droplets and heavier particles (down to
30 microns in size) are forced to the wall of the bowl, eventually
settling in the bottom of the bowl.
||In this stage the fuel has to pass the vane system positioned on the “outside” of
the central housing. Due to the differing length of the vanes and the twofold
rapid change of fuel flow direction, smaller water droplets and finer particles
will settle on the vanes. These settlements will agglomerate and when heavy
enough fall to the bottom of the bowl. Already at this point the major
portion of any contaminates in the fuel have been separated.
||Just below the filter element the flow area of the filter is increased
significantly thus reducing the fuel flow rate. This calming effect allows
even smaller water droplets and particulate to fall out settling on the
inner surfaces of the housing, forming larger droplets which eventually
fall into the bottom of the bowl by gravity. Due to the before described
pre-separation process, the major portion of water and particulate present
in the fuel will be in the bowl or on the inner surfaces of the filter,
thus greatly extending the filter element life.
|The final filtration of the remaining water and particulate still contained
in the fuel will be effected by a replaceable filter element. These filter
elements are produced from a special filter media and are available in
diffrent pore sizes.