Page 26 - ingenioren

Fuel Filtration

Overview
FUEL FILTRATION Diesel Engine Fuel Filtration Requirements

Fuel filtration today is an integral part of the complete fuel
Diesel fuel and diesel fuel systems have proven to be
ever-changing technologies and no more so than today.
control into account from the beginning. Water separation,
Over the past decade, numerous emission standards and
particulate and non-traditional contaminants need to be
engineering achievements have come together to provide system. A well designed fuel system takes contamination
some of the most advanced, clean, and yet flexible engine controlled. Engineers must be conscious of the relationship
designs. The changes have also included the acceptance between the fuel circuit design and overall system
of alternative forms of fuels such as biodiesels. The next cleanliness.
decade is likely to see more change and improvements
as diesel engines remain the work horse behind today’s Finally, global companies must understand global fuel
industrialized world. quality concerns and end user needs. Documentation
such as the World Wide Fuel Charter exists to promote
Fuel filter performance and technology have also been convergence of various regional practices. Auxiliary
challenged by these rapid advancements. Today it is user needs such as design type, preferred alternate fuel
common to demand secondary filtration of 3-5 µm absolute base stocks, and maintenance practices must also enter
efficiency, while matching with an upstream primary filter the design process. Understanding your customer and
of 7-25 µm. These changes come with the expectation that delivering fuel filtration solutions is our commitment to you.
water separation, filtration life, and packaging space remain
constant or are improved upon. Donaldson engineers have
proven to be up to this challenge through the advancement
of media technologies.

Designed to protect the injection pump. Filter
Typical Diesel withstands higher pressures than the primary
Engine Fuel Circuit filter. Can be a fuel filter water separator.
Secondary Fuel Filter
High Pressure New Requirements (3-5 µm)
Injection Pump Historical Requirements (2-15 micron)

High Pressure
Clean Fuel Pressurized
Fuel

Check Valve
Fuel Injectors

Hot Fuel Transfer Pump

Fuel, Free Water & Air

Primary Fuel Filter
Air New Requirements (7-25 micron)
Historical Requirements (10-50 micron)
Fuel A large capacity filter (fuel filter with water
µm = micron separation) on the suction side of the transfer
Water pump, it’s primary purpose is to filter out
contaminant and water from fuel before
Fuel Tank reaching the transfer pump.
Water in fuel storage tanks is a contaminant to
the engine fuel system. Adding filtration to bulk
fuel storage results in a cleaner fuel system.

24 • Engine Liquid Filtration www.donaldson.com