Pipes and tubular conduits – With flow regulators and/or baffles – Restrictors
Patent
1984-02-10
1986-02-04
Bryant, III, James E.
Pipes and tubular conduits
With flow regulators and/or baffles
Restrictors
138 40, 138 43, 1376253, 13762537, 251127, F15D 100, F16K 4700, F16K 4708
Patent
active
045679150
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.
REFERENCES:
patent: 3917221 (1975-11-01), Kubota et al.
patent: 3954124 (1976-05-01), Self
patent: 3987809 (1976-10-01), Baumann
Bates Charles L.
Cain Fred M.
Bryant III James E.
Valtek Incorporated
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