What are the three primary functions of a control valve?

The primary functions of a control valve are to start, stop, and control the flow of fluids within a system. These functions are essential in managing the process variables such as flow rate, pressure, and temperature.

Starting and stopping the flow is crucial for operational safety and efficiency, allowing operators to manage system processes effectively. Control involves adjusting the flow rate to achieve desired process conditions. By enabling precise control over the amount of fluid passing through, control valves can maintain the desired operating conditions in various applications.

In contrast, other options do not comprehensively cover the main roles of a control valve. While regulating, isolating, and discharging may relate to different aspects of valve types or systems, they do not encapsulate the foundational control functions. Additionally, terms like "accelerate," "deactivate," and "channel" are more general and not specifically applicable to the functionalities of control valves in the manner required to accurately describe their primary role.