Patent ID: 7647940

Claim:
An apparatus for controlling a valve, the apparatus comprising: an enclosure; an operating media distribution system disposed in the enclosure, the operating media distribution system including: a manifold block having a plurality of holes; an operating media supply passage extending from each of the plurality of holes to an exterior surface of said manifold block; an operating media exhaust passage extending from each of the plurality of holes to said exterior surface of said manifold block; an operating media distribution cartridge including: a cylinder disposed in a respective one of the plurality of holes and being exchangeable with respect to the manifold block, said cylinder having an outer surface extending along an axis associated with said cartridge, said cylinder having a plurality of recesses defined by a plane lying along the cartridge axis, at least one circumferential groove circumscribing the cartridge axis; and at least one longitudinal groove extending parallel to the cartridge axis; and a spool assembly disposed in the cylinder and being displaceable between a first and a second configuration relative to the cylinder; and an electronic control unit disposed in the enclosure, the electronic control unit operates a valve to control operating media flow in the operating media distribution system.