A fuel valve (50) for injecting e.g. a low flashpoint liquid fuel into the combustion chamber of a large slow running two-stroke turbocharged self-igniting internal combustion engine. The fuel valve (50) comprises an elongated fuel valve housing (52), a nozzle (54) with a closed tip (59) and a hollow interior that forms a chamber (55) connected to nozzle holes (56), a fuel inlet port (53) for connection to a source (60) of pressurized liquid fuel, an actuation liquid port (92), a pump piston (80) received in a first bore (81) with a pump chamber (82) in the first bore (81) on one side of the pump piston (80), an actuation piston (83) received in a second bore (84) in the valve housing (52) with an actuation chamber (85) in the second bore (84) on one side of the actuation piston (83), the pump piston (80) being connected to the actuation piston (83) to move in unison therewith, the actuation chamber (85) being connected to the actuation liquid port (92), a valve member with an axially displaceable shaft (67)
