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Title: Split Venturi, Axially-Rotated Valve

The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. A typical cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation. An internal wide radius elbow typically connected to a rotatable portion of the eccentric venturi may assist in directing flow with lower friction losses. A valve actuator may actuate in an axial manner yet be uniquely located outside of the axial flow path to further reduce friction losses. A seal may be used between the two portions that maymore » include a peripheral and diametrical seal in the same plane.« less
Authors:
 [1] ;  [1] ;  [2]
  1. (Laramie, WY)
  2. (Sheridan, WY)
Publication Date:
OSTI Identifier:
879450
Report Number(s):
US 6109293
US patent application 08/925535
DOE Contract Number:
FC02-91ER75680
Resource Type:
Patent
Research Org:
Univ. of Wyoming, Laramie, WY (US)
Country of Publication:
United States
Language:
English