Patent attributes
A flow rate control valve comprising a valve body having an input port, an output port and an exhaust port, a valve means that is arranged in the valve body and controls the communication of the ports, and an electromagnetic operation means for driving the valve means. The valve means has a first valve body having a first valve portion that is seated on a partitioning plate disposed in a communication chamber formed between the input port and the output port and a first valve portion provided at one end portion, and a second valve body having a valve portion that comes in contact with the second valve portion. Diameters of the slide surfaces at which the slide portions of the first valve body and the second valve body come in slide contact with seals, a diameter of a contact portion at which the first valve portion of the first valve body comes in contact with the partitioning plate, and a diameter of the contact portion at which the valve portion of the second valve body comes in contact with the second valve portion of the first valve body, are set to be equal to each other.
