Valve assembly for a fuel supply system and fuel supply system

Valve arrangement (10) for a fuel supply system, in particular for a common-rail fuel supply system of an internal combustion engine designed as a marine diesel engine, with a pilot control valve (11), a main valve (12) and a pressure control valve (13), wherein the main valve (12) can be connected with pressure connections (16, 17) to a high-pressure region (15) of the fuel supply system, and wherein both the pilot control valve (11) as well as the pressure control valve (13) can be connected with pressure connections (20, 21) to a low-pressure region (4) of the fuel supply system, namely such that the pilot control valve (11), the main valve (12) and the pressure control valve (13) can be automatically controlled depending on the pressure in the low-pressure region (14) and/or depending on the pressure in the high-pressure region (15).