Electromagnetic actuation equipment for switching and proportional valves, has central guide tube made of magnetically conducting material permeability of which is lower than permeability of yoke and central stationary and moving parts

摘要

The equipment has an electrical coil (2), a yoke (3), a central stationary part (4), a central movable part (5), an air gap (6) and a central guide tube (7). The tube is formed from a magnetically conducting material whose permeability is lower than the permeability of the yoke and the central movable and stationary parts. The permeability is however larger than that of non-magnetic steel. An independent claim is also included for the method for the production of electromagnetic actuation equipment.