Control Valves

A control valve is a throttling valve with an actuator that functions as a final control element in a control loop. Actuators allow control valves to be repositioned remotely from a central location, such as a control room. A typical control system has a sensor that measures the actual flow rate and a controller that compares the actual flow rate to the flow rate setpoint and adjusts the valve opening percentage to keep it as close as possible to the setpoint. This course will focus on control valve bodies and trim.