Patent ID: 7565918

Claim:
A rotary control valve system, comprising: a housing; a valve body enclosed within the housing, wherein the valve body further comprises: a first valve member having a first volute formed therein, wherein the first volute further includes a plurality of flow channels of varying dimensions; a second valve member in close proximity to the first valve member having a second volute formed therein, wherein the second volute further includes a plurality of flow channels of varying dimensions; and wherein the first and second volutes cooperate with one another to form a continuously variable concentric, tapered circular orifice between the first and second valve members, wherein the continuously variable concentric, tapered circular orifice is configured to predictably regulate a flow of fluid therethrough, and wherein the dimensions of the continuously variable concentric, tapered circular orifice are continuously variable based on the positions of the individual flow channels relative to one another; and a drive mechanism for axially rotating the first and second valve members in opposite directions relative to one another for varying the dimensions of the orifice formed between the valve members; a source of power in communication with the drive mechanism; and a system controller for controlling the drive mechanism.