Control valves regulate the flow of liquids, gases, or a mixture of both as required. In its most basic form, a control valve has an adjustable aperture which is opened and closed manually as necessary—opening to increase the flow and closing to decrease the flow. Why do we need control valves? In many cases, the piping system requires a precise amount of constant flow to properly determine the size of the pump, piping and other accessories. If there is no proper flow control valve, the fluctuating system pressure will deviate from the design flow. The flow control valve should be constant. All valves in the system can be added together to help…