Anti-cavitation low-noise control valve cage trim for high pressure reducing service in liquid or gaseous flow
US4567915A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Feb 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86791
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve trim cage assembly for anti-cavitation control valves comprises a plurality of concentrically nested, cylindrical sleeves with fluid flow constricting annular channels defined between adjacent sleeves. Each sleeve has an indentical multiplicity of radial plenum holes contained therein which serve as expansion chambers, each plenum hole intersecting at least one flow constricting channel to provide tortuous fluid flow paths of alternating expansion plenum holes and constricted annular channels radially through the cage assembly. The cross sectional area of the channels increase from sleeve to sleeve in the direction of fluid flow to provide staged and gradually decreasing pressure reduction as the flow proceeds through the cage assembly. The area of the plenum holes is much greater than the total cross sectional area of all annular channels intersecting the plenum hole such that the channels are always flow restricting and the plenums are expansion chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.