Abstract: A valve having a valve piston (13) which can be moved linearly in a valve housing (10) and a linear drive (20) which comprises a stator (21) which is connected immovably to the valve housing (10) and a rotor (22) which can be moved therein and loads the valve piston (13), is characterized in that, if a coil (23) is embedded in the stator housing, in each case one outer web (25) is arranged on the outer sides thereof or, if a plurality of coils (23) are embedded in the stator housing, in each case one inner web (24) is arranged between the coils (23) and in each case one associated outer web (25) is arranged on the outer sides of the outermost coils (23), wherein the axial extents of inner webs (24) and outer webs (25), permanent magnets (26) and pole pieces (27) are adapted to one another in such a way that, in order to configure a force increase which is active when the at least one pole (23) is energized, at least one corner (A, B) (C, D) of a pole piece (27) on one side and at least one corner (A?, B?) (C?

Abstract: The invention relates to an actuator for actuating a valve installed in a hydraulic or compressed air system comprising a coil support which can be displaced by means of air space induction in a magnetically conducting housing on a magnetic cylinder composed of a permanent magnet and a cylinder pole disk. The invention is characterized in that the dimensions of the permanent magnet and the pole disk correspond to each other in such a way that the diameter of the front surface of the permanent magnet is at least the same size as the circumferential surface of a neighboring pole disk and that the width of the coil associated with the pole disk exceeds the width of the pole disk by the lift amplitude of the coil support.

Abstract: The invention relates to an actuator for actuating a valve installed in a hydraulic or compressed air system, comprising a coil support which can be displaced by means of air space induction in a magnetically conducting housing on a magnetic cylinder composed of a permanent magnet and a cylinder pole disk. The invention is characterised in that the dimensions of the permanent magnet (16) and the pole disk (17) correspond to each other in such a way that the diameter of the front surface of the permanent magnet (16) is at least the same size as the circumferential surface of a neighbouring pole disk (17) and that the width of the coil (23) associated with the pole disk (17) exceeds the width of the pole disk (17) by the lift amplitude of the coil support (19).

Abstract: The invention relates to an actuator for actuating a valve installed in a hydraulic or compressed air system, comprising a coil support which can be displaced by means of air space induction in a magnetically conducting housing on a magnetic cylinder composed of a permanent magnet and a cylinder pole disk. The invention is characterised in that the dimensions of the permanent magnet (16) and the pole disk (17) correspond to each other in such a way that the diameter of the front surface of the permanent magnet (16) is at least the same size as the circumferential surface of a neighbouring pole disk (17) and that the width of the coil (23) associated with the pole disk (17) exceeds the width of the pole disk (17) by the lift amplitude of the coil support (19).

Abstract: The invention relates to an actuator for actuating a valve installed in a hydraulic or compressed air system comprising a coil support which can be displaced by means of air space induction in a magnetically conducting housing on a magnetic cylinder composed of a permanent magnet and a cylinder pole disk. The invention is characterized in that the dimensions of the permanent magnet and the pole disk correspond to each other in such a way that the diameter of the front surface of the permanent magnet is at least the same size as the circumferential surface of a neighboring pole disk and that the width of the coil associated with the pole disk exceeds the width of the pole disk by the lift amplitude of the coil support.

Abstract: A cooled electric motor comprising a releasable sealing cover element for protecting electrical components, in particular, coil winding heads located in end spaces between opposite end faces of a stator plate pack and respective bearing shields. The cover can be removed for service in cleaner environments.