Download Centrifugal Pump Handbook, Third Edition by Sulzer Pumps PDF

By Sulzer Pumps

This long-awaited new version is the whole reference for engineers and architects engaged on pump layout and improvement or utilizing centrifugal pumps within the box. This authoritative advisor has been built with entry to the technical services of the best centrifugal pump developer, Sulzer Pumps. as well as delivering the main finished centrifugal pump conception and layout reference with specific fabric on cavitation, erosion, number of fabrics, rotor vibration habit and forces performing on pumps, the guide additionally covers key pumping functions issues and operational matters, together with working functionality in a variety of kinds of circuitry, drives and recognition testing.

  • Enables readers to appreciate, specify and utilise centrifugal pumps extra successfully, drawing at the industry-leading adventure of Sulzer Pumps, one of the world's major centrifugal pump developers.
  • Covers idea, layout and operation, with an emphasis on providing first class quality and potency ideas for top capital outlay pump plant users.
  • Updated to hide the most recent layout and expertise advancements, together with functions, attempt and reliability tactics, cavitation, erosion, choice of fabrics, rotor vibration behaviour and operating functionality in quite a few sorts of circuitry.
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Extra info for Centrifugal Pump Handbook, Third Edition

Example text

As a result, the motor takes up a high current, with the risk of destroying the windings (Fig. 21). 21 Starting torque curve for electric motor and pump 46 Behavior of Centrifugal Pumps in Operation because of the static friction of the moving parts involved. ). The torque curve depends very much on specific speed, as may be seen from Fig. 4. Pumps with lower specific speed have a torque characteristic that rises with flow rate, whereas pumps with high specific speed have a characteristic that falls, as flow increases.

When the pipeline is partly blocked by solids which have settled upon shutdown, the pump must generate sufficient flow to get the solids moving. The higher resistances encountered at startup must be overcome, so that adequate flow velocity may be achieved to resume transportation process. 8. When pumping long fibers, open impellers should be used on account of the clogging risk. The inlet edges should be profiled and thickened so that fibers can slide off them more easily. 9. Slurry pumps are subject to heavy wear.

When one pump fails in series operation, the other runs at lower flow and lower efficiency in a range where uneven performance must be expected (Fig. 8a). In this case, pumps in parallel operate much better and give greater flow at a higher efficiency. Where pumps operate in series, it must be borne in mind that the seals and casings on the downstream pump are under higher pressure. The shaft seal may have to be balanced to the suction pressure of the upstream pump. Recirculation losses result from this, which must be taken into account in the overall efficiency calculation.

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