Pressure actuator diaphragm casing with air passages

F - Mech Eng,Light,Heat,Weapons – 15 – B

Patent

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Details

F15B 15/10 (2006.01) F16K 31/126 (2006.01)

Patent

CA 2507231

A control valve pressure actuator (10) of the pressure-to-close type is provided with a housing in which an upper diaphragm casing (14) thereof includes one or more air passage channels (34, 36). Each of the air passage channels facilitates circulation of air above a diaphragm (20) within the pressure actuator (10) at all times, including when the diaphragm (20) is in a fully open position. By permitting the circulation of air above the diaphragm (20) even when in a fully open position, adjacent an inside surface to the top of the upper diaphragm casing (14), there is not a tendency for the diaphragm (20), biased toward the open position by springs (26), to stick to the inside surface of the top of the upper diaphragm casing (14).

L'invention concerne un actionneur (10) à pression à vanne de régulation de type à fermer par pression comprenant un logement, dans lequel un logement (14) supérieur pour diaphragme comprend un ou plusieurs canaux de passage (34, 36) pour l'air. Chaque canal de passage pour l'air facilite la circulation de l'air au-dessus du diaphragme (20) à l'intérieur de l'actionneur (10) à pression à chaque fois, notamment lorsque le diaphragme (20) est en position complètement ouverte. En permettant la circulation d'air au-dessus du diaphragme (20), même en position complètement ouverte, de manière adjacente à une surface intérieure de la partie supérieure du logement (14) supérieur pour diaphragme, le diaphragme (20), orienté en position ouverte par des ressorts (26), n'a pas tendance à coller à la surface intérieure de la partie supérieure du logement (14) supérieur pour diaphragme.

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