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US 4,540,025 AGranted
Throttling ball valve
AssigneeGrove Valve and Regulator Company
InventorsHoward L. Ledeen, William P. Ledeen
Life of this patent
Estimating the term…
Abstract
A throttling ball valve with an array of closed spaced horizontal plates secured across the flow passage through the ball. The leading edges of the plates are streamlined so that the flow stream will be divided into a plurality of laminar flow streams, each with a boundary layer across a surface of the plate. Energy is absorbed in the boundary layer phenomenon. The array of horizontal plates is preferably contained in a cylindrical sleeve which is inserted and secured into the cylindrical flow passageway through the valve ball.
Claims4
A throttling valve comprising:
- a valve body with aligned flow passages;
- a valve plug rotatable in said valve body intermediate said flow passages;
- a flow passageway through said valve plug;
- and
- means sealing between said body and said plug around said flow passageway;
- said valve being further characterized in that it includes:
- first array of a plurality of plates mounted across said passageway transverse to the axis of rotation of said plug and closely spaced to define a multiplicity of narrow flow channels between them;
- a second array of a plurality of plates mounted across said passageway downstream of said first array thereof;
- the leading edges of said plates being streamlined to divide smoothly a fluid stream impinging thereon and produce smooth laminar flow across and spaced from the surfaces of said plates with boundary layers adjacent to said surfaces, so that the boundary layers so generated produce a frictional drag on fluid flow and further confine the effective flow space between each pair of adjacent plates.
6 more elements
Dependencies are inferred from the claim text.