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Plug valve havig interchangeable plug member

  • US 4,778,152 A
  • Filed: 05/19/1987
  • Issued: 10/18/1988
  • Est. Priority Date: 05/19/1987
  • Status: Expired due to Fees
First Claim
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1. A rotary plug valve having a body including a wall defining a plug receiving chamber, a plug member including fluid passage therethrough and having a peripheral side wall portion having a selected diameter, said side wall portion having at least a resilient material to a selected depth, said wall of said body having openings therein disposed so that when said plug member is rotatably located in said chamber, said fluid passage will be alignable in flow communication with at least some of said openings, said wall further including raised metallic surface formed thereon extending from said wall into said chamber to a selected distance and located in a selected pattern relative to said openings so that, when said plug member is rotatably disposed in said plug receiving chamber, said metallic surface means will locally deform said resilient material and thereby sealingly engage sections of said resilient material of said plug member to substantially prevent leakage of fluid therebetween.

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