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Fuel Filtration
Overview
Trends Driving Fuel System Technology Changes FUEL FILTRATION
Higher injection Fuel temperature Fuel recirculated with New Fuel
pressures management high return flows
Filtration
Systems
Lower sulfur & Fuels used as coolant Fuel storage
biodiesel fuels and lubricant
Harmful Contaminants How Particulate and Water Are Removed
Found in Fuel Systems
Particulate & Debris
Enters when fuel is Clean fuel enters the
transferred between storage filter through holes in
tanks. Particulate in the the baffle/thread plate.
fuel can disrupt engine
combustion and cause wear on
injectors. Contaminants and
debris are removed
Water from the fuel as they
Water in the fuel causes pass through the
filter.
corrosion and reduces
the lubricity of fuel. It
can negatively affect the
combustion process and Specialized filter media
consequently damage in the cartridge removes
system components. Water water from the fuel.
enters the fuel from storage tanks.
Wax/Paraffin Water coalesces into
Drop out of fuel in cold weather large drops that drain into
conditions. a lower cavity of the spin-
on unit or drain bowl.
Microbes (Bacteria)
Can grow in the water at the fuel
interface.
Water requires
daily draining by the
Fuel Degradation Products (FDP) operator. Choice of
Fuel by-products result from the manual or water-in-
thermal and oxidative instability of fuel (WIF) sensors.
fuel prior to combustion.
Asphaltenes
Found naturally in crude oil and can
be found in refined fuel.
Air
Enters the system from leaks in the
fuel line or system connections. What is a Standpipe?
Found in some applications, a standpipe
is built in to the filter to prevent loss of
system prime to reduce or eliminate air
from reaching the fuel injection system.
www.donaldson.com Engine Liquid Filtration • 25
