More than one kind of filter is used on turbine engines. A
paper cartridge filter is usually used on the lowpressure side of
the pump. It uses a replaceable paper element, shown in figure 2.9,
capable of filtering out particles larger than 100 microns, or about
the diameter of human hair.
A cylindrical screen
filter is generally used where
the fuel pressure is low. The
filter is constructed of
stainless steel wire mesh cloth
and is capable of filtering out
particles larger than 40 microns.
Such a filter, shown in figure
2.10, may be cleaned, preferably
ultrasonically, and reused.
In addition to the main
line filters, other filtering
elements may be located in the
fuel tanks, fuel control, fuel
nozzles, and just about any other
place fuel is routed.