The circulating lubrication oil system is essential for cooling and lubricating all kinds of rotating machinery. In typical train steams or gas turbines, diesel engines, reduction or step-up gears, compressors, generators, pumps or expanders could be included. The oil system includes a number of components for which the pumps provide adequate flow and pressure—such as the gears, journal and thrust bearings in the machinery. The cooling and filtering of the oil are equally dependent on pump flow and pressure to function properly.
