A control valve includes a valve body having a main valve passageway. A flow control assembly is positioned in the main valve passageway and includes a first control element, and a second control element rotatable relative to the first control element between a closed position, a first position, and a second position. In the closed position, the first and second control elements form a plug which prevents fluid flow through the main valve passageway. In the first position, the first and second control elements collectively define a first control passageway therethrough, and in the second position, the first and second control elements collectively define the first control passageway and a second control passageway therethrough.