A large two-stroke turbocharged compression-ignited internal combustion crosshead engine comprising: a plurality of cylinders, a source of pressurized ignition liquid (Pi), a source of pressurized sealing oil (Ps), and two or more fuel valves arranged in each cylinder, said fuel valve being configured for injecting low flashpoint liquid fuel into the combustion chamber of said engine, said fuel valve comprising: an elongated valve housing with a rear end and a front end, a nozzle with a plurality of nozzle holes, said nozzle being disposed at the front end of said elongated valve housing, a fuel inlet port in said elongated valve housing for connection to a source of pressurized low flashpoint fuel, an actuation fluid port in said elongated valve housing for connection to a source of actuation fluid, an axially displaceable valve needle slidably received in a longitudinal bore in said fuel valve, said valve needle having a closed position and an open position and said valve needle being biased towards said closed position, said valve needle allowing flow of fuel from said fuel cavity to said plurality of nozzle holes when the valve needle is in its open position and said valve needle preventing flow of fuel from said fuel cavity to said plurality of nozzle holes when the valve needle is in its closed position, a pump piston received in a first bore in said valve housing with a pump chamber in said first bore on one side of said pump piston, said pump piston is slidably received in said first bore with a clearance between said pump piston and said first bore, an actuation piston received in a second bore in said valve housing with an actuation chamber in said second bore on one side of said actuation piston, said pump piston being operably connected to said actuation piston, said actuation chamber being fluidically connected to said actuation fluid port, said pump chamber having an outlet fluidically connected to said fuel cavity and an inlet fluidically connected to said fuel inlet port, a sealing liquid inlet port connected to said source of pressurized sealing liquid (Ps), a sealing oil flow path (93,96,97,99) connecting said sealing liquid inlet port to said longitudinal bore for sealing said valve needle in said longitudinal bore, characterized by an ignition liquid inlet port connected to said source of pressurized ignition liquid (Pi), an ignition liquid conduit extending from said ignition liquid inlet port to said clearance for sealing said pump piston in said first bore and for delivering ignition liquid to said pump chamber. a plurality of cylinders, a source of pressurized ignition liquid (Pi), a source of pressurized sealing oil (Ps), and two or more fuel valves arranged in each cylinder, said fuel valve being configured for injecting low flashpoint liquid fuel into the combustion chamber of said engine, said fuel valve comprising: an elongated valve housing with a rear end and a front end, a nozzle with a plurality of nozzle holes, said nozzle being disposed at the front end of said elongated valve housing, a fuel inlet port in said elongated valve housing for connection to a source of pressurized low flashpoint fuel, an actuation fluid port in said elongated valve housing for connection to a source of actuation fluid, an axially displaceable valve needle slidably received in a longitudinal bore in said fuel valve, said valve needle having a closed position and an open position and said valve needle being biased towards said closed position, an elongated valve housing with a rear end and a front end, a nozzle with a plurality of nozzle holes, said nozzle being disposed at the front end of said elongated valve housing, a fuel inlet port in said elongated valve housing for connection to a source of pressurized low flashpoint fuel, an actuation fluid port in said elongated valve housing for connection to a source of actuation fluid, an axially displaceable valve needle slidably received in a longitudinal bore in said fuel valve, said valve needle having a closed position and an open position and said valve needle being biased towards said closed position, said valve needle allowing flow of fuel from said fuel cavity to said plurality of nozzle holes when the valve needle is in its open position and said valve needle preventing flow of fuel from said fuel cavity to said plurality of nozzle holes when the valve needle is in its closed position, a pump piston received in a first bore in said valve housing with a pump chamber in said first bore on one side of said pump piston, said pump piston is slidably received in said first bore with a clearance between said pump piston and said first bore, an actuation piston received in a second bore in said valve housing with an actuation chamber in said second bore on one side of said actuation piston, said pump piston being operably connected to said actuation piston, said actuation chamber being fluidically connected to said actuation fluid port, said pump chamber having an outlet fluidically connected to said fuel cavity and an inlet fluidically connected to said fuel inlet port, a sealing liquid inlet port connected to said source of pressurized sealing liquid (Ps), a sealing oil flow path (93,96,97,99) connecting said sealing liquid inlet port to said longitudinal bore for sealing said valve needle in said longitudinal bore, characterized by an ignition liquid inlet port connected to said source of pressurized ignition liquid (Pi), an ignition liquid conduit extending from said ignition liquid inlet port to said clearance for sealing said pump piston in said first bore and for delivering ignition liquid to said pump chamber.