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In This Issue
| - How a Low Cloud Point Affects Filters
- 3 Reasons Why Lube Oils Fail
- How Viscosity Changes When Oil Oxidizes
- Effects of Filtration on Oil Analysis
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| How a Low Cloud Point Affects Filters |
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| Viscosity is not the only issue associated with a high-pressure drop across filters on start-up. It might also have to do with the oil not having a high enough cloud point. For indoor equipment where filter elements are involved, this can be much more important than the pour point. The cloud point is the point when you can first see wax coming out of solution. If you can see the wax, then you know that the filter will also see it. In most cases, the wax goes back into solution as the oil warms up. There is generally not a good correlation between cloud point and pour point because pour point depressants (additives to lower the pour point) enter into the picture. (Ken Brown, Utility Service Associates)
Join us in Las Vegas, Nev., on September 20-22 for
Machinery Lubrication training.
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| These three factors are why we change oil. No matter what you do, eventually you will have to change it. However, the cleaner, cooler and drier it is kept, the longer you will be able to go between those changes. |
FULL STORY
Test your knowledge and prepare for ICML lubrication and oil analysis certification.
Question: When an oil oxidizes, how does its viscosity typically change?
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From “Machinery Oil Analysis”:
Most industrial machines utilize filtration or are periodically serviced with filter carts. Changing internal filters almost always causes a significant loss of oil that must be made up. Dilution by new oil artificially lowers test results. This effect is proportional to the amount of oil added in relation to the capacity of the system. Small machines tend to lose a higher proportion of total volume during filter changes than large machines. In some cases, a developing problem such as abnormal wear can be completely masked by a filter change and top-up. In addition, the new filter may exhibit different characteristics, skewing test results even further. When sampling, top-up and/or filter change occurs at the same point in the maintenance schedule, take the sample first.
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Read more about “Machinery Oil Analysis”:
SEPTEMBER 2011
Machinery Lubrication I
September 14-15 - Cartagena, Colombia
Machinery Lubrication I
September 14-15 - Santa Cruz, Bolivia
Oil Analysis I
September 14-15 - Buenos Aires, Argentina
Fundamentals of Machinery Lubrication
September 20-22 - Las Vegas, NV
Practical Oil Analysis
September 20-22 - Las Vegas, NV
OCTOBER 2011
Oil Analysis II
October 3-4 - Buenos Aires, Argentina
Fundamentals of Machinery Lubrication
October 4-6 - Branson, MO
Machinery Lubrication I
October 4-5 - Venezuela
Machinery Lubrication II
October 6-7 - Venezuela
Oil Analysis II
October 10-12 - Quito, Ecuador
Oil Analysis II
October 10-13 - South Korea
Oil Analysis I
October 12-13 - Panama
Congreso Mexicano de Confiabilidad y Mantenimiento
October 17-19 - León, Guanajuato, México
Oil Analysis I & II
October 17-20 - Kuala Lumpur, Malaysia
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