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Stacked disk valve trim

  • US 6,615,874 B2
  • Filed: 01/22/2002
  • Issued: 09/09/2003
  • Est. Priority Date: 01/22/2002
  • Status: Active Grant
First Claim
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1. 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.

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