Electromagnet for a hydraulic system

An electromagnetic valve for a hydraulic system, comprising:

• an armature chamber filled with a hydraulic medium and fluidically connected to hydraulic lines of the hydraulic system;
• an armature mounted in the armature chamber such that its stroke is adjustable, the armature having a shut-off body and dividing the armature chamber into an opening-side chamber facing a flow opening and an inner chamber facing away from the flow opening,
• wherein during a stroke movement of the armature, an oil exchange occurs, during which a displacement volume of the hydraulic medium overflows from the opening-side chamber into the inner chamber, wherein a hydraulic line leading to the opening-side chamber or to the inner chamber of the armature chamber has at least one dirt collecting element that is designed as a permanent magnet and that retains contaminations in the hydraulic medium that flows through the hydraulic line during an oil exchange, wherein the dirt collecting element is a dirt collecting contour that is formed on an inner wall of the hydraulic line and has elevations and depressions.