Control valves are used extensively throughout industry as final control elements to manipulate the process by varying a restriction in a flowing fluid, thereby throttling fluid flow. In essence, a control valve is a device that dissipates hydraulic energy in a controlled manner. The control valve is dominant among final controlling elements and, barring unforeseen technological advances, is expected to maintain its prominent position for many years to come.
The following discussion represents an insight into the application of control valves and an appreciation of control valve sizing, selection, and installation considerations.
CONTROL VALVE COMPONENTS
Control valves generally consist of a valve body and a valve ...