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The three way valve has a chamber in the body which is adapted to provide a connection from an outlet passage to both inlet passages. One inlet passage is closed by a valve lid which bears on a valve seat and which functions as an automatic outlet valve when the armatures moves into a top position. The other valve lid moves independently in dependence on the inlet pressure of the second inlet passage and the pressure in the outlet passage. In the illustrated rest position, the armature acts by way of a convex closure member to press the lower valve lid onto a valve seat about the second inlet passage. Various types of three way valve have been known for controlling the flow of a medium through three passages. Generally, such valves are constructed with a body having three passages extending to a common chamber with communication from two passages to the chamber being controlled by two valve lids, each of which cooperates with a valve seat. In such constructions, various means have been provided for controlling the movement of the lids. Generally, each lid is moved in a positive manner by an actuating element in order to control a flow through a respective passage.