Deposit control in fuel injector nozzles

An injector nozzle for a fuel injected internal combustion engine, said injector nozzle including a port (5) having an internal valve seat surface (15) and a valve member (3) having an external seating surface (17), said valve member (3) being movable relative to the port (5) to respectively provide a passage between the valve seat surface (15) and the external seat surface (17) for the delivery of fuel therethrough or sealed contact therebetween to prevent said delivery of fuel, the port further including an outer port surface (16) surrounding and located adjacent the valve seat surface (15) and external to the port (5), wherein the angle between the valve seat surface (15) and the outer port surface (16) of the port (5) is less than 90 degrees.