Control motors are classified primarily into which two categories?

Control motors are indeed classified primarily into valve actuators and damper actuators because these categories specifically reflect the primary functions these motors are designed to fulfill in HVAC and refrigeration systems.

Valve actuators are responsible for controlling the motion of valves to regulate the flow of refrigerants or fluids within a system. They efficiently operate based on temperature, pressure, or manual controls and are critical in managing system efficiency and response times.

Damper actuators, on the other hand, are used to adjust air flow in duct systems. These actuators control the position of dampers to optimize air distribution, maintaining desired system performance and energy efficiency.

Both types of actuators are essential for seamless system operation, ensuring that HVAC and refrigeration systems respond effectively to changes in demand or operational conditions. This classification emphasizes the function and control aspect of motors used in these applications rather than electrical characteristics or torque ratings, making it the most relevant answer for the question.