CRYOGENIC PUMPS: THE STATE OF THE ART

The pumps considered in this article are those which can be used for LNG and LPG cargoes. Pumps for cryogenic services fall broadly into two main categories: deepwell pumps, and submerged pumps. Deepwell pumps are driven by hydraulic or electric motors which are positioned outside the storage tank, and the power is transmitted by shafting through mechanical seals or glands to the pumps situated on the tank bottom. Submerged pumps are directly coupled electrically-driven pumps, and both pump and motor are positioned at the bottom of the tank and are submerged in the liquid to be pumped. Both types of pump are described, but more emphasis is placed on the submerged type, which is more recent and less well known. Submerged pumps of current design are suitable for most cryogenic liquids except ammonia. One European manufacturer (not named in the article) is said to have a pump for ammonia on test, but it is too early yet to form any conclusions. A brief description, with a sketch, is given of a thrust equalising mechanism developed and patented by the Cryodynamics Division of the Worthington Pump Corporation.

  • Availability:
  • Corporate Authors:

    Institute of Marine Engineers

    Memorial Building, 76 Mark Lane
    London EC3R 7JN,   England 
  • Authors:
    • Myatt, DGT
  • Publication Date: 1979-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00303319
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Feb 27 1980 12:00AM