초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [8.] A method of controlling the flow of fluid through a conduit, comprising the steps of providing a ball valve in the conduit having a through bore formed therein for receiving the fluid, defining a plurality of relatively small flow passages and at least one relatively larg

[ What is claimed is:] [8.] A method of controlling the flow of fluid through a conduit, comprising the steps of providing a ball valve in the conduit having a through bore formed therein for receiving the fluid, defining a plurality of relatively small flow passages and at least one relatively large flow passage in the conduit downstream of the ball valve, rotating the valve to direct the fluid from its bore through one or more of the flow passages, and providing an airfoil surface in the conduit downstream of the ball valve to prevent separation of the fluid as it passes through the relatively large flow passage.