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Anti-cavitation throttle valve and method of operating the same

  • US 9,435,441 B2
  • Filed: 02/11/2014
  • Issued: 09/06/2016
  • Est. Priority Date: 02/11/2013
  • Status: Active Grant
First Claim
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1. A throttle valve for communicating fluid comprising:

  • a throttle housing having an inlet end and an outlet end;

    a shuttle housing disposed within the throttle housing, said shuttle housing having a first end cap at a first end and, at a second end, an orifice array having a plurality of openings therethrough, said shuttle housing comprising a shuttle therein, said shuttle comprising a first piston and a second piston spaced apart by an arm, said shuttle having an opened position and a closed position relative to the shuttle housing, said shuttle defining a varying control volume between the end cap, the first piston and the shuttle housing and said second piston varying the amount of flow through the plurality of openings in the orifice array through which fluid is communicated into the shuttle housing and into the outlet end; and

    a control inlet fluidically communicating a control fluid to the control volume to control the position of the shuttle in the shuttle housing wherein the control fluid is controlled through a valve assembly comprising a first valve selectively communicating fluid from a high pressure source to the control inlet and a second valve selectively communicating fluid from a low pressure source to the control inlet.

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