ES257583U - Antirrebose valve (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Anti-drift valve, which being of the type comprising a displaceable obturator of its seat to open the valve, putting in communication the area thereof corresponding to the input conduit with the corresponding to the outlet conduit, said shutter being associated with a diaphragm provided with a restricted bleed hole and counting the obturator with an axial hole less restricted than the previous one, which respectively communicate the entrance area of the valve and the exit area of the same with a pilot chamber, whose shutter orifice when it is in the non-obstructed situation by means of a displaceable core causes the displacement of the obturator itself by action of the pressure difference in the fluid with the consequent opening of the valve, essentially characterized in that the core is constituted by two pieces of which one of them constitutes the proper closure for the axial hole of the shutter and is related to on the second through a spring, there is a permanent magnetic field capable of exerting an attraction that is normally sufficient to keep the two parts of the nucleus together, overcoming the force of the spring placed between them and tending to separate them with what is it would close the mouth of the obturator orifice corresponding to the outlet of the pilot chamber, so that when said valve control device acts, a permanent magnet, creator of said permanent magnetic field, moves from its normal position to a position in the said permanent magnetic field of attraction, and the resulting separation of the two parts of the core, by the intermediate spring, causes the end piece to obstruct the pilot's mouth, causing the closing of the valve. (Machine-translation by Google Translate, not legally binding)