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Modified volute pump casing

  • US 4,213,742 A
  • Filed: 10/17/1977
  • Issued: 07/22/1980
  • Est. Priority Date: 10/17/1977
  • Status: Expired due to Term
First Claim
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1. A centrifugal pump having a casing, inlet, impeller, throat and cutwater, the improvement comprising:

  • said casing being of a modified volute configuration having in the upstream portion thereof, from the cutwater towards a point generally 180°

    from the cutwater, a flow area which is greater than would be the flow area of a true volute casing in the same upstream casing portion;

    the flow area of said casing in the downstream portion thereof, from the throat back upstream towards a point generally 180°

    from the cutwater, also being greater than would be the flow area of a true volute casing in the same downstream casing portion; and

    the flow area of the casing in the juncture portion of the pump extending from the upstream portion through a point 180°

    from the cutwater and to the downstream portion being significantly less than would be the flow area of a true volute casing at said juncture portion.

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