| 摘要 |
A proportional control valve has a main fluid passage, a valve portion having a flap, a magnetic element disposed in proximity to the valve portion and mounted integrally in the main passage, a movable body disposed inside the magnetic element and actuated by the magnetic element to directly or indirectly displace the flap of the valve portion and an electric control unit connected to a detector for detecting a characteristic parameter to be controlled, and controlling the movable body in accordance with the detected parameter. This proportional control valve allows a precise and easy fluid flow rate control, as the fluid flow rate can be continuously and precisely varied in proportion to variations in the parameter detected by the detector.
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