Double solenoid valve actuator
Apparatus for moving a reciprocating object, such as a spring biased poppet valve, between a rest and a second position. The apparatus includes two solenoids,Forged Steel Valves each of which has a core, with one of the solenoids having a larger core and imparting greater force than the other. The solenoids are mounted in line with one another so that the core of one solenoid is adapted to contract the core of the other, with the latter being adapted to contact the object. Bellow Seal ValveA first solenoid provides a driving force to the object to move it in opposition to a biasing force and the second solenoid holds the object in its moved position when the first solenoid is de-energized. When the core of the first solenoid is in its rest position, WATER POWER CONTROL VALVEit is out of contact with the core of the second solenoid and this enables the biasing force of the object to rapidly move to its rest position upon de-energization of the second solenoid. A method of controlling the movement of a control valve means between closed and open positions with first and second solenoid means respectively having first and second moveable core means that are operatively coupled to one another and with the control valve means, with the first core means having a greater mass than the second, there being a second biasing means biasing the first core means away from the second core means, the control valve means being biased by a first biasing means with a predetermined force toward said closed position, said method quickly moving the control valve means from said open to said closed position, said method comprising the steps of: energizing the first solenoid means to move the first core means into contact with and moving said second core means and also covering the predetermined biasing force of the first biasing means to thereby move the control valve means to the open position; energizing the second solenoid means to hold said second core means so that the control valve means is in the open position; de-energizing the first solenoid means so that the second biasing means moves the first core means out of contact with the second core means; and, de-energizing the second solenoid means so that the first biasing means moves the control valve means rapidly toward the closed position and simultaneously moving the second core means towards the first core means.
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