General submersible pumps, i.e. "standard" pumps sometimes submerged in a ballast or fuel tank for ease of installation or to avoid the necessity for priming attachments, and normally driven hydraulically, are briefly discussed. The Author, of Stothert & Pitt Ltd, then considers sumbersible pumps for chemical carriers and LNG/LPG carriers; the design of these pumps, the system layout, reasons for choosing submersible pumps in preference to other types, maintenance of the pumps, net positive suction-head difficulties are all briefly examined. The advantages of submersible pumps, in suitable applications, appear to outweigh their drawbacks. For chemicals, the choice lies between a hydraulically-driven submersible pump, with sealing difficulties within the tank, and line-shaft (deep-well) pumps, with bearing problems on the line shaft; there are satisfactory applications for both types. For liquefied gases, the electrically-driven submersible pump, with bearings lubricated by the pumped fluid, has become almost standard. For small general-product carriers, the cargo pump-room with positive displacement pumps is perhaps still the best solution. For medium-size ships of this type, submersible pumps are not generally used but would appear to be a reasonable long-term solution. In very large tankers, changes from current practice would hardly be justified either technically or commercially. Order from: BSRA as No. 48,910.

  • Corporate Authors:

    Trade and Technical Press, Limited

    Crown House
    Morden, Surrey SM4 5EW,   England 
  • Authors:
    • Sterling, L
  • Publication Date: 1978-3

Media Info

  • Pagination: 7 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00180035
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM