Double safety solenoid valve assembly - has two independently operating valves in one housing with common solenoid and nested armatures, allowing relative axial movement

摘要

The assembly has two independent valves in the same housing, switched in series. Each has a valve head with a magnetic armature positively locked to it and the valve heads lift up against spring force to allow fluid to flow past. Both valve heads have the same axis, and are one above the other. The armature of one 912) is hollow and inside slides the armature(15) of the other. Only a single solenoid winding (21) is used for both armatures. The former for the solenoid has a magnetic upper part (26), a non-magnetic middle part (25) and another magnetic lower part (24).