Electromagnetic actuator (10) of a valve device (130), in particular in a common rail system of a motor vehicle, comprising an armature (50) for actuating a valve element (200) located in a duct, saidarmature (50) being arranged in a housing (12) and being movable axially along a longitudinal axis (X) of the actuator (10) when an excitation coil (30) is energized, further comprising a pole core (20), characterized in that the electromagnetic actuator (10) is designed as an electromagnetic adhesive system that comprises a plate-typ armature (50) which entirely covers planar end faces (22) of the pole core (20) that extend orthogonally to the longitudinal axis (X).