Low noise ball valve assembly with downstream airfoil insert

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

Patent

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Details

F16K 47/08 (2006.01) F16K 5/06 (2006.01) F16K 5/08 (2006.01)

Patent

CA 2233535

A valve assembly and method for controlling the flow of fluid through a conduit in which a ball valve is disposed in the conduit and is provided with a through bore for receiving the fluid. An insert is also disposed in the conduit downstream of the ball valve and has a plurality of relatively small flow passages. A relatively large flow passage is defined by that portion of the conduit not occupied by the insert. The valve is rotatable in the conduit to direct the fluid from its bore through one or more of the flow passages and a portion of the insert forms an airfoil surface to prevent separation of the fluid as it passes through the relatively large flow passage.

Ensemble de robinet et méthode pour contrôler le débit d'un fluide dans un conduit où est placé un robinet à boisseau sphérique comportant un trou de passage pour recevoir le fluide. Une pièce rapportée est également placée dans le conduit en aval du robinet à boisseau sphérique et a une pluralité de passages d'écoulement relativement petits. Un passage d'écoulement relativement gros est défini par la portion du conduit qui n'est pas occupée par la pièce rapportée. Le robinet peut tourner dans le conduit pour diriger le fluide de son trou de passage vers un ou plusieurs passages d'écoulement, et une partie de la pièce rapportée forme une surface portante pour prévenir la séparation du fluide quand il traverse le passage d'écoulement relativement gros.

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