| 摘要 |
PROBLEM TO BE SOLVED: To lower a height of an electropneumatic conversion-type air regulator having: a main valve for opening and closing between a primary pressure introduction port and a secondary pressure taking-out port; a floating piston moved in accordance with pressure difference between the secondary pressure taking-out port and a pilot pressure chamber, for opening and closing the main valve; a nozzle body having a nozzle passage for communicating the pilot pressure chamber to the atmospheric air; a flapper composed of an elastically deformable leaf spring opposite to an opening end of the nozzle passage of the nozzle body; and an electromagnetic driving device for changing a position of the flatter to the nozzle body in accordance with the strength of an analogue input signal. SOLUTION: At least a part of the nozzle body is composed of a permanent magnet assembly having a permanent magnet, the nozzle passage is formed on a shaft part of the permanent magnet assembly, and the flapper is composed of a coil bobbin part positioned around the permanent magnet assembly and having a coil wound on its outer peripheral part, and the leaf spring connected to the coil bobbin part, and the electromagnetic driving device is composed of the permanent magnetic assembly and the coil of the flapper. COPYRIGHT: (C)2003,JPO
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