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DISC VALVE WITH MOLDED-IN-PLACE LINER AND REPLACEABLE SEAT

  • US 3,675,677 A
  • Filed: 04/02/1970
  • Issued: 07/11/1972
  • Est. Priority Date: 04/02/1970
  • Status: Expired due to Term
First Claim
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1. A disc valve for controlling the flow of fluid through adjacent pipe sections having pipe flanges on the adjacent ends thereof, comprising:

  • a valve body having opposite end faces adapted to be engaged by the pipe flanges and a bore therethrough aligned with the pipe sections, a counterbore in one end of the valve body forming an annular shoulder facing the respective end of the valve body;

    a valve stem journaled in the valve body extending diametrically across a medial portion of said bore;

    an off-set disc secured to the stem within said bore;

    a replaceable seat in said counterbore against said shoulder having an elastomer seating surface thereon shaped and sized to mate with the outer periphery of the disc when the disc is turned transversely across said bore to prevent the flow of fluid through the valve, said seat also having an annular elastomer sealing portion engaging the respective pipe flange and preventing the leakage of fluid from the respective pipe section between the valve body and the outer periphery of the seat; and

    an elastomer lining molded in lace around the wall of said bore from the seat to the opposite end of the valve body to shield the wall of said bore from the fluid being controlled and form seals around the valve stem, said lining being projected from said opposite end of the valve body and sealingly engaging the respective pipe flange to prevent the leakage of fluid between the respective pipe flange and the respective end face of the valve body.

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