Two coil electromagnetic valve driver having spring return mechanism with two coils/permanent magnet and having center section defining magnetic flux path skirting round outside permanent magnet.

摘要

The drive unit moves between two end positions using a spring. There are two coils (21) and a permanent magnet (25). A center section (18,22) defines a magnetic flux path (29) from the coil. The magnetic path passes near to the outside of the permanent magnet.