The invention relates to a filling system for filling a reservoir (6) arranged in a submarine (1) with a grainy granular material (5), wherein the filling system comprises a pumping element (22) for producing a granular material flow in the direction of the reservoir, wherein the filling system comprises a separating element (14) for removing a dust content from the granular material flow, wherein the separating element has a perforated plate (31) having holes, through which holes the dust content can be sucked out of the granular material flow.
