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Choked flow valve with clamped seat ring

  • US 9,915,353 B2
  • Filed: 10/21/2015
  • Issued: 03/13/2018
  • Est. Priority Date: 10/28/2014
  • Status: Active Grant
First Claim
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1. A fluid valve comprising:

  • a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway;

    a trim assembly disposed within the fluid passageway; and

    a fluid control member movably disposed within the fluid passageway, the fluid control member cooperating with the trim assembly to control fluid flow through the fluid passageway;

    wherein the trim assembly includes a clamped seat ring, the clamped seat ring including a convergent-divergent nozzle, a diverging portion of the nozzle being longer than a converging portion of the nozzle,wherein trim assembly includes a retainer that clamps the seat ring into the valve body, the retainer including an upper body portion and a skirt that extends away from the upper body portion, the skirt guiding movement of the fluid control member,wherein the retainer further includes a securement ring that is positioned adjacent to the seat ring, the seat ring being at least partially disposed between the securement ring and the valve body, andwherein the skirt is connected to the securement ring by a plurality of legs, at least one leg in the plurality of legs having an airfoil cross-sectional shape, and a trailing edge of the at least one leg having a sharp edge.

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