Page 107 - ingenioren

Technical Reference

Donaldson provides this technical reference as a short course in Technical Reference
“Engine Liquid Filtration 101”—for those who want to gain a better
understanding of fluid filtration for engines.

In engine applications all over the world, we too often see engine
systems that don’t include proper fluid filtration (especially fuel), or
include it as an afterthought. Good filtration needs to be an integral
part of the circuit to ensure the long life and proper operation of
the pumps, turbos, injectors and bearings. Today diesel engines
are very sophisticated with many precision systems working
together. These systems require optimum filtration to ensure their
performance.

This guide is offered to aid in choosing the filter that will help you
achieve the ideal cleanliness levels and longest life for your critical
components.

Material in this section is in the public domain, not confidential,
and may be copied for educational purposes at any time.
Information was collected from many sources, both public
and private, including Donaldson Company, Inc. Engineering
Departments, Society of Automotive Engineering (SAE), ISO, and
various industry authorities.

Engine Components Need Protection ............................................................. 106
How Contamination Damages Precision Parts ................................................ 106
Where Contamination Comes From ................................................................ 107
Basic Filtration Principles .................................................................................. 108
Liquid Filtration Pressure Drop ..........................................................................110 ENGINE LIQUID FILTRATION - TECHNICAL REFERENCE
Combining the ISO Rating and Filter Performance Ratings ............................112
ISO Rating System ..............................................................................................113
Filter Efficiency Ratings ......................................................................................113
Fuel Filtration - Biodiesel Fuels..........................................................................114
Filtration for Alternative Fuels: CNG, LPG & LNG Systems ............................117
Oil Analysis..........................................................................................................118
Frequently Asked Questions (index of questions) ...........................................119
Fuel .......................................................................................................................120
Lube .......................................................................................................................121
Coolant ..................................................................................................................123
Fuel Filtration Application Design Worksheet .................................................. 125
Lube Filtration Application Design Worksheet ................................................ 127

Symbols Used
ß Beta Ratio
cSt Centistokes
DP Pressure Drop or Differential Pressure
ISO International Standards Organization
µm Micron or micrometer
ppm Parts per million
SSU Saybolt Seconds Universal
SUS

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