Control valves are valves that typically utilize a globe-shaped body and a movable plug or disc to regulate fluid flow, offering precise control and versatility. They come in two-way designs for flow control and pressure regulation in single pipelines, and three-way designs for diverting or mixing services. These valves can be actuated using pneumatic or electric options, allowing for automated control and integration with various systems. Pneumatic actuators use compressed air to operate the valve, while electric actuators use electric motors, providing flexibility and precision in controlling fluid flow.