SOLENOID VALVE

PURPOSE:To reduce the number of necessary parts and the working cost of a solenoid valve in which an armature is driven under electromagnetic force to change over communication passages, by making the lower end part of the armature thin and as well by forming a valve section at the front end of the armature. CONSTITUTION:A solenoid valve body 11 is formed therein with a plurality of ports A through C to which pipes 12 through 14 are connected, respectively. The lower end part of an armature 15 slidably fitted in the solenoid valve body 11 is made thin, as well the frontmost end thereof is formed with a conical valve part 15a, and the top end part thereof is also made thin to obtain an introducing part 15b. Further, an attracting element 15 is closely fitted into the top end of the solenoid valve body 11, and a compression spring 17 is disposed between the attracting element 16 and the armature 15. Further, a solenoid coil 18 is inserted in the top section of the solenoid valve body 11, and is secured to the attracting element 16 with bolts 19. With this arrangement, no ball valve may be required so that even the port sections of the solenoid valve 11 may have a uniform thickness.