Control Valves

 Control Valve:

The control valve is an automated valve that can make precise adjustments to regualate and monitor any commodity flowing through a piping system.

The most common valve body used as a control valve is the globe valve. Because globe valve provides the most effective means to regulate and control flow.

Control valves use signal received from instruments positioned throughout the piping system to automatically make adjustments that regulate the commodity within the pipe.

Control valves are typically used to control the flow of a commodity within a pipe or to limit its pressure.

Working Principle:

The process plant comprises of numerous control loops in order to deliver consistent quality products. These control loops have a set pressure, temperature, flow, level in order to maintain the required operating range. Each of these control loops experience internal disturbance and these disturbances are measured by sensors and transmitters. The information collected is then processed by the controllers to decide what should be done to rectify these load disturbances. Once the data collected is analyzed, measured, compared and calculated then a controlling element is implemented. This is where the control valve comes into the picture and work to reduce these disturbances.

Thus, the control valve working principle revolves around the manipulation of the flowing fluids such as water, gas, steam or chemical compounds to ensure minimizing the load disturbance and regulating the process variable to the closest value of the desired set point.