Plug valve having preloaded seal segments

  • US 9,638,337 B2
  • Filed: 08/07/2015
  • Issued: 05/02/2017
  • Est. Priority Date: 08/16/2012
  • Status: Active Grant
First Claim
Patent Images

1. A plug valve comprising:

  • a valve body having an inlet port, an outlet port and a central chamber extending between the inlet port and the outlet port;

    an inlet seal segment disposed within the central chamber and having a bore extending therethrough and aligned with the inlet port;

    an outlet seal segment disposed within the central chamber having a bore extending therethrough and aligned with the outlet port;

    a plug member disposed in the central chamber, the plug member moveable between an open position, to facilitate fluid flow through the plug valve, and a closed position, to block fluid flow through the plug valve; and

    a first side segment and a second side segment detached and spaced apart from the first side segment, wherein the first and the second side segments are secured to and tensioned between the inlet seal segment and the outlet seal segment to prevent the flow of fluid between the seal segments and the plug member.

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