A fuel valve for injecting gaseous fuel into the combustion chamber of a large two-stroke low-speed turbocharged compression-igniting internal combustion engine, said fuel valve comprising: an elongated valve housing with a rear end and a front end, a nozzle comprising an elongated nozzle body extending from a base to a closed tip, a main bore extending from said base to said closed tip and a plurality of nozzle holes connected to said main bore, said nozzle being disposed at said front end of said elongated valve housing with said base connected to said front end, a fuel inlet port in said elongated valve housing for connection to a source of pressurized gaseous fuel, an axially displaceable valve needle slidably received in a longitudinal bore in said elongated valve housing with a clearance between said valve needle and said longitudinal bore, said axially displaceable valve needle having a closed position and an open position, with axially displaceable valve needle resting on a seat in said closed position and said axially displaceable valve needle having lift from said seat in said open position, an actuator system for controllably moving said axially displaceable valve needle between said closed position and said open position, said seat being disposed in said elongated valve housing between a fuel chamber in said valve housing and an outlet port in said front end of said elongated valve housing, said outlet port connecting directly to said main bore in said nozzle, said fuel chamber being connected to said fuel inlet port, said clearance opening at one end of said longitudinal bore to said fuel chamber, a sealing oil inlet port for connection to a source of pressurized sealing oil, a sealing oil supply conduit connecting said sealing oil inlet port to said clearance at a first position along the length of the longitudinal bore, and an ignition liquid inlet port for connection to a source of pressurized ignition liquid, characterized by an ignition liquid conduit extending from said ignition liquid inlet port through said elongated valve housing to said clearance at a second position along the length of said axial bore that is closer to said fuel chamber than said first position. an elongated valve housing with a rear end and a front end, a nozzle comprising an elongated nozzle body extending from a base to a closed tip, a main bore extending from said base to said closed tip and a plurality of nozzle holes connected to said main bore, said nozzle being disposed at said front end of said elongated valve housing with said base connected to said front end, a fuel inlet port in said elongated valve housing for connection to a source of pressurized gaseous fuel, an axially displaceable valve needle slidably received in a longitudinal bore in said elongated valve housing with a clearance between said valve needle and said longitudinal bore, said axially displaceable valve needle having a closed position and an open position, with axially displaceable valve needle resting on a seat in said closed position and said axially displaceable valve needle having lift from said seat in said open position, an actuator system for controllably moving said axially displaceable valve needle between said closed position and said open position, said seat being disposed in said elongated valve housing between a fuel chamber in said valve housing and an outlet port in said front end of said elongated valve housing, said outlet port connecting directly to said main bore in said nozzle, said fuel chamber being connected to said fuel inlet port, said clearance opening at one end of said longitudinal bore to said fuel chamber, a sealing oil inlet port for connection to a source of pressurized sealing oil, a sealing oil supply conduit connecting said sealing oil inlet port to said clearance at a first position along the length of the longitudinal bore, and an ignition liquid inlet port for connection to a source of pressurized ignition liquid, characterized by an ignition liquid conduit extending from said ignition liquid inlet port through said elongated valve housing to said clearance at a second position along the length of said axial bore that is closer to said fuel chamber than said first position.