Cooling Tower Flow Control Valve. A flow control valve regulates the flow or pressure of a fluid. Control valves normally respond to signals generated by independent devices such asflow meters or temperature gauges.Control valves are normally fitted with actuators and positioners. Pneumatically-actuated Cylinder Operated control valves are widely used for control purposes in many industries. The most common final control element in the process control industries is the control valve. The control valve manipulates a flowing fluid, such as gas, steam, water, or chemical compounds, to compensate for the load disturbance and keep the regulated process variable as close as possible to the desired set point. #Cooling-Tower-Flow-Control-Valve-in-Rajkot-Vapi-Vadodara-Gujarat-India.