The invention is a guide tube arranged in an outer housing (10) and comprising lateral outer walls (44), the interior (16) of said guide tube being delimited at its end face by a base portion (18) At least one magnet coil (22) including a guide tube and disposed between the outer housing (10) and the guide tube (12) and within the guide tube (12) along the operating axis (4) A guided electromagnetic armature (14), an exterior (34) surrounding the exterior housing (10), and an interior (16) connected to the exterior (24), and a base portion (18) and the exterior housing (10) And a vent borehole (30) guided therethrough. The vent borehole (30) has two interconnected section sections (36, 38). The first section (36) is guided through the base portion (18). The first sectioning section (36) has a first opening (40) arranged on the inner side of the base portion (18) and a second opening (42) arranged on the lateral outer wall (44) . The second section (38) is guided through the outer housing (10). The vent borehole (30) is sealed by a perimeter seal (32) between the guide tube (12) and the outer housing (10).
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