Patent ID: 6615874
Filing Date: 2003-09-09
Classification: F16K,Y10T

Abstract:
A flow control device including a valve trim assembly comprising a plurality of valve trim disks defining a plurality of flow paths along a fluid passage between a fluid inlet and a fluid outlet of said flow control device, wherein respective flow paths defined by said valve trim disks comprise:an expansion/contraction mechanism having a cross section including rapid increases and decreases in cross-sectional flow area; a velocity control mechanism defining a cross-sectional flow profile defining a relatively low cross-sectional flow area proximate said fluid inlet and a relatively high cross-sectional flow area proximate said fluid outlet; an acoustic chamber configured to defeat acoustic disturbances generated in said expansion/contraction mechanism and said velocity control mechanism; and frequency shifting passages configured to direct fluid flow from said acoustic chamber to said fluid outlet and increase the sonic frequency of acoustic disturbances associated with said directed fluid.