FILTRERINGSSYSTEM, BRÆNDSTOFSYSTEM OG FREMGANGSMÅDE TIL DRIFT AF ET FILTRERINGSSYSTEM

Disclosed is a filtration system (120) for a fuel system for an engine (4) of a marine vessel (1), the filtration system (120) comprising: an inlet (124a) for fluid connection to a settling tank (110), the settling tank (110) being for cleaning fuel for the engine (4); an outlet (124b) for fluid connection to a service tank (130), the service tank (130) being for storing fuel for the engine (4); and an arrangement of plural primary filtration devices (122a-d), wherein the arrangement is fluidly connected between the inlet (124a) and the outlet (124b) so that fuel flowing in use from the settling tank (110) via the inlet (124a) to the service tank (130) via the outlet (124b) passes through at least one of the primary filtration devices (122a-d). The filtration system (120) is configured to cause each respective primary filtration device (122a-d) of the arrangement to operate, independently of each other primary filtration device (122a-d) in the arrangement, selectively in either: a first mode, in which the filtration system (120) causes fuel to flow, in use, in a first fluid direction (188) through a filter (180a) of the respective primary filtration device (122a-d), the filter (180a) being configured to remove contaminants from the fuel, or a second mode, in which the filtration system (120) causes a fluid to flow, in use, through the filter (180a) in a second fluid direction (189), opposite to the first fluid direction (188), to dislodge the contaminants from the filter (180a).