Magnet system for a valve

A magnet system for an outwardly opening magnet valve having an outward axially extending jacket (5) connected with an outer pole (3') and surrounding a core winding (17), an inner axially extending pole (3) arranged inwardly in said core winding (17) and formed by a central tube, an armature (2), a valve body carried by said armature, a permanent magnet (1) disposed symmetrically with respect to the winding (17), wherein the closed magnet circuit of the electromagnet and the permanent magnet (1) partly overlap, a ring (21) of ferromagnetic material in the magnet circuit of the electromagnet, said ring (21) is associated with the permanent magnet (1) and magnetically connects said jacket (5) with said inner and outer poles, said ring (21) reduces a flux (I) of the permanent magnet (1) to one-half of its total flux output, and the magnet circuit for the electromagnet is reduced to one-half of the permanent flux of sad permanent magnet.