Fluid flow control valve assembly with independent feedback...

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

Patent

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Details

F15B 11/00 (2006.01)

Patent

CA 2524468

A fluid flow control valve assembly (10) that can be actuated using an electrically operated or pneumatically operated flow control valve (26) includes a valve body having a fluid supply passageway (44), a fluid exhaust passageway (52), and a fluid bypass passageway (54). A pilot operated relief valve (16) is disposed in the fluid bypass passageway, wherein the pilot operated relief valve blocks the fluid bypass passageway to create a pressure upstream of the pilot operated relief valve to actuate a different pilot operated device (40) having a pilot line (42) in fluid communication with the fluid bypass passageway upstream of the pilot operated relief valve. Fluid flowing through a venturi nozzle (24) in the fluid bypass passageway that intersects the fluid exhaust passageway lowers the pressure in the fluid exhaust passageway.

Un ensemble soupape de réglage du débit d'un fluide pouvant être actionné au moyen d'une soupape de réglage du débit à commande électrique ou pneumatique comprend un corps de soupape qui comporte un passage d'alimentation en fluide, un passage de sortie de fluide et un passage de dérivation du fluide. Une soupape de sûreté commandée par pilote est placée dans le passage de dérivation du fluide, ladite soupape de sûreté commandée par pilote bloquant le passage de dérivation du fluide pour créer une pression en amont de la soupape de sûreté commandée par pilote afin d'actionner un autre dispositif commandé par pilote ayant une ligne de pilote qui communique par le fluide avec le passage de dérivation du fluide en amont de la soupape de sûreté commandée par pilote. Le fluide s'écoulant par un dispositif venturi dans le passage de dérivation du fluide qui croise le passage de sortie du fluide diminue la pression dans le passage de sortie du fluide.

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