FLOW REGULATING VALVE

PURPOSE:To prevent the dispersion of flow rates caused by the accuracy of manufacturing, and as well to prevent dead water in its closed condition of a flow regulating valve, by forming two kinds of switching passages in a pin and as well by the valve so arranged that a slight flow may be obtained even in its closed condition. CONSTITUTION:A pin 6 is formed in a part opposing the liquid passage 3 with two kinds of switching passages 7A, 7B having different diameters with suitable spaces therebetween in the vertical and horizontal directions, respectively. By rotating the pin 6 to communicate either one of the switching passages 7A, 7B with the liquid passage 3, two kinds of flow rates may be selected. When the pin 6 is rotated by an angle of 45 deg., both switching passages 7A, 7B are opposed to the inner wall of a hole 4 so that the valve becomes its closed condition. Even in this closed condition a slight fluid may flow through a gap 8. With this arrangement no dead water is left in the valve which is closed.