Metering device with dynamic sealing

A metering device for dosing pressurized fluids, in particular an injection valve for a fuel injection system in an internal combustion engine, is disclosed in which a metal bellows (10a) as the hermetic sealing between the fluid chamber (2) for the pressurized fluid to be dosed and the actuator chamber (9) is provided hermetically fastened to an abutting washer (13) that is attached to the valve needle (4) and to a spring seat (14) of the valve body (1), between which elements the helical spring (12) is arranged that biases the valve needle (4) to close the metering opening (3).