Abstract: An electromagnetic control device for controlling a flush valve of a flush tank includes a housing, a lever pivotally coupled to the housing to actuate the flush valve. A casing is secured in the housing for slidably receiving an armature which is coupled to the lever with a spring member. An electromagnetic device may actuate the armature to operate the lever via the spring member. A number of plates and one or more magnets are disposed in the casing for maintaining the electromagnetic field generated by the electromagnetic device.