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Normally closed solenoid valve includes a fixed core, a valve portion including a valve seat and a valve body, a movable core disposed between the fixed core and the valve seat, a resilient biasing member for biasing the movable core in a valve-closing direction and a coil.
Conventionally, there are two types of solenoid valves for opening and closing a flow path of a hydraulic fluid, one of which is a normally closed solenoid valve that is normally closed and is opened by excitation of a fixed core and a movable core when a current is rendered to flow into a coil, and the other of which is a normally open valve that is normally opened and is closed by excitation of a fixed core and a movable core when a current is rendered to flow into a coil.
It is therefore an object of the present invention to provide a normally closed solenoid valve in which the thrust force of a movable core working against a resilient biasing member in the initial position or assembling allowance range is fixed.