What does the term "continuous lube oil purification by centrifugal force" refer to?

The term "continuous lube oil purification by centrifugal force" specifically refers to the operation of lube oil purifiers utilizing centrifugal principles to separate impurities from lube oil. This process involves spinning the lube oil at high speeds within a centrifuge, which creates a force that separates contaminants based on their density differences. The heavier impurities are thrown outward and collected, while the cleaner oil is drawn towards the center and returned for use.

This method is crucial in maintaining the quality and integrity of lube oil, as it continuously removes contaminants without the need for a batch process. The ongoing purification helps extend the life of the oil and keeps machinery running efficiently.

In contrast, the other options do not define this specific process accurately. For instance, batch purification implies a non-continuous method that is not what is being described here. Likewise, heating lube oil or storing it refers to processes unrelated to purification and centrifugal force.