This fragment shows in detail how oil mist is applied to the different bearings of centrifugal pumps. The mist that is transported by the main header reaches a manifold, from where different tubings can be derived with application to different points. In these derivations, reclassifiers are installed, which are devices specially designed to significantly increase the particle size of the mist; from about 3 microns up to 10 microns; and also to dose the appropriate amount of oil mist, according to the type of bearing; in order to provide the right amount of lubricant.

In the lower part of the graph, you can see how the mist is collected after having been lubricated, and it can be collected and recirculated again.

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In this video we can see in a summarized way what a mist lubrication system is like. We see the Oil Mist Generator Console, which is a cabinet with an oil tank, and two mist generators, one main and one auxiliary. This console has no moving parts to generate the mist; and it only works with instrument air and lubricating oil, generating a mixture of 200,000 parts of air to one of oil, which is then conducted through a pipe to the different application points.

Oil mist is transported through a main header, and in each equipment, it is applied by special dosing devices to each bearing of the pumps. After the mist is applied, it is collected by a system that condenses the oil again and it is returned to the console to be reused, forming a completely closed system.

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In this video we will see what the root causes of failures in centrifugal pumps are.

Failures due to bearings and mechanical seals are the most important as contributors to negatively impacting the reliability of centrifugal pumps. Within the failures due to bearings, the greatest impact is the presence of particles in the lubrication. Throughout the next videos, we will see how oil mist lubrication manages to solve the problem of the presence of particles in the lubricant, which causes the greatest number of failures due to bearings. We will also see that failures classified as caused by “mechanical seals” are also reduced.

In summary, and as we mentioned in the previous post, the MTBF of centrifugal pumps is greatly improved when oil mist lubrication is applied.

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