Automatic drain valve

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 17/04 (2006.01) F16K 51/00 (2006.01) F16T 1/14 (2006.01)

Patent

CA 2334742

A drain valve {38) removes liquid from a compressed air system (20) whenever cycling pressure of the system (20) reaches either a preselected high drain pressure or a preselected low drain pressure at an inlet port (39) of the valve (38). An inlet face (79) of a piston (78) of an adjustable pressure valve assembly within a valve body normally seals the inlet port (39) when there is no pressure. The piston (78) is located within a portion of a central cavity of the valve (38). The piston's inlet face (79) is of a sine which allows the force of the adjustable pressure valve assembly to be overcome by a pre-selected high drain pressure at the inlet port (39).

La présente invention concerne un valve de purge (38) destinée à éliminer du liquide d'un système d'air comprimé (20) lorsque la pression cyclique du système (20) atteint, à un orifice d'admission (39) de la valve (38), ou bien une pression élevée, prédéterminée, de purge ou bien une pression basse, prédéterminée, de purge. Une face d'admission (79) d'un piston (78) d'un assemblage de valve à pression réglable, placé dans un corps de valve, ferme normalement de manière étanche l'orifice d'admission (39) lorsqu'il n'y a pas de pression. Le piston (78) est placé dans une partie de la cavité centrale de la valve (38). La face d'admission du piston (79) est d'une taille telle que la force de l'assemblage de la valve à pression réglable soit surpassée par une pression de purge élevée, prédéterminée, à l'orifice d'admission (39).

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