ELECTROMAGNETIC VALVE DEVICE.

摘要

The device (1) comprises: - a body (2, 7) with an inlet (3) and an outlet (4) for the fluid, and with a main valve seat (6) through which the fluid can flow from the inlet (3) to the outlet (4), - a main plug (8, 9) associated with this main seat (6), - a control chamber (11) partially delimited by the main plug (8); - a first passage (8d, 9b, 9c) for communication between the inlet (3) and the control chamber (11); - a second passage (12, 13) for putting the control chamber (11) into communication with the outlet (4); and - a control solenoid valve (14) including a control solenoid (15) which controls a movable unit (17) comprising a first core (18) which can interact as a movable plug with the second passage (12, 13). The movable unit (17) comprises a second movable ferromagnetic core (21), adjacent to the first core (18). A spacer element (19) extends between the main plug (8, 9) and the second core (21). One or more springs (20, 22) push the second core (21) towards the main plug (8, 9). The second core (21) is permanently fixed to the main plug (8, 9) and, when the solenoid (15) is inactive, the first core (18) is kept in the closed position of the second passage (12, 13), and the second core (21) is in a predetermined position with respect to the first core (18) such that the cores (18, 21) are separated by a gap (24). The activation of the solenoid (15) causes an attraction of the first core (18) towards the second core (21) and the opening of the second passage (12, 13).