When it comes to flow control valves, valve types range from simple to sophisticated. Some valves are complex enough to adjust automatically to pressure variations. No matter their construction, flow control valves are designed to regulate the flow or pressure of fluids, and they typically react to signals generated by flow meter.
Flow control valves can serve a number of different functions within a hydraulic flow system depending on the specific type that is used. Flow control valves are also known for their reliability and typically have a long operating lifetime.
PLUNGER FLOW CONTROL VALVE
The plunger flow control valve is mainly designed for the water flow regulation in a pipeline. The flow regulation happens through the axial movement of a piston, operated by a rod and crank mechanism. The piston is positioned in the centre of the body valve and steers in a chamber properly shaped in order to avoid noises and cavitation damages. This characteristic confers to the valve regular operation free from vibrations. The water flow is guided in an annular chamber around the streamlined central body. The cross section of this chamber is continuously reducing from inlet to the throttle. This causes continuous rise of flow speed and fall of the pressure. The geometrically ideal design, confines the cavitation bubbles in the centre of the outlet mouth, avoiding damages to the valve.
AUTOMATIC CONTROL VALVE DIAPHRAGM ACTUATED
Automatic control valves have the integral capability to control the function using energy from the conveyed water by adjusting the position of the obturator. They can be directly operated, i.e. the force is applied (via a spring or diaphragm) directly to the obturator. They can be pilot operated, i.e. the force is applied through an adjustable pilot valve.