Ross Operating Valve Company

Mark Entwistle

Richard Schnell

Eric Oden Cummings

The redundant valve systemof the preferred embodiments includes a first valve unit, a second valve unit, a third valve unit, a first diagnostic device, a second diagnostic device, and a control unit. The third valve unit has a first position that allows fluid flow toward the first valve unit and a second position that allows fluid flow toward the second valve unit. The first diagnostic device and the second diagnostic device are adapted to detect the presence of a fault in the first valve unit and the second valve unit, respectively. The control unit is coupled to the third valve unit and adapted to cycle between a first operation mode that requests the first position for the third valve unit and a second operation mode that requests the second position for the third valve unit.

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Burnley, United Kingdom

Mark Entwistle