NEEDLE VALE

The needle-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 center of the body valve and steers in a chamber properly shaped in order to avoid noises and cavitations damages. This characteristic confers to the valve regular operation free from vibrations.The water flow is guided in a annular chamber around the streamlined central body. The cross section of this chamber is continuously reducing from inlet to the throttle. This causes continuous rises of flow speed and fall of the pressure. The geometrically ideal design, confines the cavitations bubbles in the center of the outlet mouth, avoiding damages to the valve.The regulation happens with high head loss, when the valve is open less than 40%, and very low head loss, when the valve is open more than 50%.