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Erosion control trim in a control mechanism for a ball valve

  • US 4,226,263 A
  • Filed: 08/14/1978
  • Issued: 10/07/1980
  • Est. Priority Date: 08/14/1978
  • Status: Expired due to Term
First Claim
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1. An improvement for not only controlling the flow of fluid in a conduit but also providing erosion trim control to be used in combination with a ball valve which includes:

  • a valve body having a bore extending therethrough, said valve body having an inlet and an outlet adapted to be mechanically coupled to the conduit and said valve body also having an aperture therein;

    a spherical valve member having a port, the axis of which is alignable with the axis of the bore of said valve body to enable flow through said port, said valve member movable to a position blocking flow through said bore of said valve body;

    a stem having an inner end operably coupled to said spherical valve member and an axially outer end which extends through the aperture of said valve body for moving said valve member to and from flow enabling and flow blocking position by moving said stem; and

    means for forming a seal between the aperture of said valve body and said stem to block leakage of fluid therebetween, said improvement comprising;

    a cylindrical sealing member movably disposed in said port of said valve member and having a central passage, an outer cylindrical sidewall, said cylindrical sealing member having an enclosed end of said central passage and a plurality of oppositely disposed holes in said outer cylindrical sidewall adjacent said enclosed end to form an erosion control trim to direct the flow through said holes into said central passage to impinge upon itself at the center of said central passage of said cylindrical sealing member, said cylindrical sealing member being slidably received and sealed within the port of the spherical valve member, andmeans for moving the position of said cylindrical sealing member in said port of said spherical valve member for exposing said holes in said cylindrical member to regulate the amount of fluid flowing through said holes and said port from exteriorly of said valve body.

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