Patent ID: 8854164

Claim:
A pressure-regulating valve, comprising: a housing; and a magnetic actuator located within the housing, the magnetic actuator including a pole tube, a magnetic coil encompassing the pole tube, and an armature configured to travel within the pole tube, wherein the armature is supported in the pole tube in a film structure, wherein the film structure has a sleeve form and a butt joint, wherein inner and outer surface areas of the film structure are coated with friction-reducing PTFE material, wherein the film structure is glass-fiber fabric providing mechanical stability to the PTFE material, wherein the pole tube has a partial recess disposed within the pole tube toward a closing cover, wherein a pole tube width at the partial recess is less than a width elsewhere along the pole tube, the partial recess representing a narrow spot with respect to the magnetic separation, wherein the partial recess enters a state of saturation at low coil currents of the magnetic coil.