Filtration of lubricants is certainly not a new concept. However, with greater emphasis now being placed on increasing sustainability profiles while also decreasing operating costs, researchers and developers have been diligently working to come up with new and improved filtration technology. Cue the emergence of double separation technology, which has the ability to remove contaminants that are smaller than a single micron, a feat that has not been possible until recently.
Offline filtration, often called kidney loop filtration, works by drawing a lubricant from a reservoir using a pump, circulating it through a short filtration circuit, and returning the now-clean fluid to the reservoir.
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There are significant challenges involved with “benchmarking technologies for offline filtration against each other,” said Kim Kjaer, global segment manager for CC Jensen A/S, in an August 30 webinar hosted by Riviera Maritime Media. “An off-line filter is basically a filter with its own pump or a different technology—like a purifier or anything else that is circulating the oil in the tank … The situation is that there are no standards for benchmarking or improving your products for offline methods.”