Pumps and Hydraulics, Volume 2

Pumps and Hydraulics, Volume 2

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...the connecting pipes. There are two general types of centrifugal pumps, viz., I, single suction, Fig. 493, in which the suction pipe enters the end of case parallel to, and in line with its center; 2, the double suction, Fig. 494, in which the suction pipe is divided forming a U shape and enters the case at both sides of the center. The single suction is used for clear water only, while the double suction will pass everything that enters the suction pipe--see engravings. When the pump is located above the water, it has to be primed before it will raise water. For these purposes an ejector, or exhauster, is frequently employed, which will exhaust the air and draw water up from the required depth. The arrangement of the ejector is illustrated at A, in Fig. 496, and is the smallest and most convenient contrivance that can be used for this work. It is screwed into the highest part of the pump, and is connected by a separate steam pipe to boiler. In a short time after turning on steam, the pump will be primed, the pump remaining stationary during the operation of priming. To prevent air returning through the discharge pipe, a check valve, B, is used. For larger pumps a gate valve is generally employed here. A foot valve fitted with a strainer to keep out obstructions likely to clog the pump should be used as it keeps the pump primed and ready for immediate use. The general form of the blades is of great importance in this type of pump, because the water is driven through the fan partly by the pressure of the Fro, 49i. blades on the water and partly by centrifugal force. The ratio which each of these forces bears to the other varies in the same pump, depending upon the proportion the speed bears to the height of it. With low lifts and high speed the...show more

Product details

  • Paperback | 88 pages
  • 189 x 246 x 5mm | 172g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236627598
  • 9781236627599