Efficient Plant April 2022 - 18

feature | lubrication solutions
Used oil fi lters
can play a major
role in your
Find Answers in
Oil Filters
Mark Barnes, PhD CMRP
Des-Case Corp.
TOOLS SUCH AS vibration analysis,
ultrasound, oil analysis, and thermography
are mainstays of a condition-based
maintenance strategy. Each provides a
unique perspective on the health of critical
rotating and non-rotating assets. Vibration
and oil analysis are particularly useful
when assessing rotating equipment such as
pumps, gearboxes, and circulating bearing-lubrication
systems, while oil analysis is
critical when monitoring hydraulic fl uids.
In the world of condition monitoring, the
complementary data provided by these two
techniques is a case of one and one equals
18 | EFFICIENTPLANTMAG.COM
three. Filter analysis (monitoring circulating
lube oils and hydraulic fl uids) is the third
leg to the stool.
Because of the impact that contamination
has on equipment life, any circulating
system needs an oil fi lter. Th e fi lter traps any
particle in the system larger than the fi lter's
micron rating. It's that basic function that
makes fi lter analysis so valuable as a condition-monitoring
tool.
Unlike oil or vibration analysis, which are
snapshots of what's happening within the
system at the instant a sample is extracted
or the vibration signature recorded, fi lter
analysis provides an historical record of
everything that has happened in the system
since the last time the fi lter was changed.
Since some fi lters don't need to be changed
more than once a year, that's a lot of historical
evidence.
In general, fi lter analysis can identify
three types of problems:
S large wear debris caused by active machine
wear
S ingressed particles from poor sealing,
intrusive maintenance, or ineff ective
breathers
S solid and semi-solid particles created by
APRIL 2022
condition-based
maintenance
strategy.
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Efficient Plant April 2022

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