when the force of spring 58 is overcome and the shaft is move downwardly into the second position the poppet valve 72 unseals the spool valve seals against the wall of the manifold surrounding the exhaust path 28 and the shaft seal 74 still is sealed against the wall section 75 thus fluids are able to flow along a path from the pressure port 26 of the manifold through the inlet 22 the flow path 21 and the outlet 24 of the housing and out the port path 30 of the manifold the shaft seal 74 prevents flow into other portions of the housing and the spool valve 70 prevents flow out the exhaust port 28 of course some mechanism must be provided to overcome the force of spring 58 a to move the shaft 52 from its first elevated position to its second position seen in fig4 and b then hold the shaft 52 in its second position in the embodiment illustrated in the drawings this mechanism comprises the electromagnet 32 working in conjunction with a lever 80 the lever 80 illustrated in fig5 is made of a material which is the same or similar to the soft magnetic material of the core the material must be physically durable to prevent flaking and erosion of the lever 80 and core 32 the lever 80 has a receiver 82 the receiver 82 has a recess 84 which receives and mates with the first end 54 of the shaft 52 the lever also includes a plate 86 extending from the receiver 82 the plate 86 has an engagement surface 88 which faces the electromagnet 32 the engagement surface 88 has two end portions 90 and.