Download Centrifugal Pump Handbook, Third Edition by Sulzer Pumps PDF

By Sulzer Pumps

ISBN-10: 075068612X

ISBN-13: 9780750686129

This long-awaited re-creation is the full reference for engineers and architects engaged on pump layout and improvement or utilizing centrifugal pumps within the box. This authoritative advisor has been constructed with entry to the technical services of the major centrifugal pump developer, Sulzer Pumps. as well as offering the main entire centrifugal pump thought and layout reference with specified fabric on cavitation, erosion, collection of fabrics, rotor vibration habit and forces performing on pumps, the guide additionally covers key pumping purposes issues and operational matters, together with working functionality in numerous kinds of circuitry, drives and popularity 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 concept, layout and operation, with an emphasis on providing first class quality and potency ideas for prime capital outlay pump plant users.
  • Updated to hide the newest layout and expertise advancements, together with functions, try and reliability techniques, cavitation, erosion, collection of fabrics, rotor vibration behaviour and operating functionality in a variety of varieties of circuitry.
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Extra resources for Centrifugal Pump Handbook, Third Edition

Example text

Torsional vibrations are often given less attention in pump units although they can be of importance as well. g. of a coupling, or even a shaft rupture. Torsional excitation from the driver is important in the following cases (list not exhaustive): . Startup of asynchronous electric motors (switching to the grid): – Excitation frequency – Grid frequency . Short circuit at motor terminal. Excitation frequencies: – Grid frequency – Twice grid frequency . Normal operation of variable speed electric motors .

Gear tooth mesh frequencies are of less importance. Torsional excitation from pump impellers: typically very small, provided the vane numbers of impeller and stator have been selected properly. This can be of some importance for waste water pumps with a small number of thick impeller vanes. g. large size, high reliability required) a torsional natural frequency analysis shall be performed. Sophisticated computer programs are available today to perform this task. It is important to note that such an analysis has always to be performed for the entire shaft train including driver, couplings, gear and pump.

The NPSH reductions shown are based on operating experience and experimental data. The validity of the diagram is subject to the following limitations: 1. The reduction may not exceed 50% of the NPSH necessary for cold water, or a maximum of 3 m, whichever is smaller. 2. It applies only to low-viscosity liquids and hydrocarbons free of air and gas. 3. It does not apply to transient operating conditions. 4. It applies when pumping petroleum products (mixtures of different hydrocarbons), provided the vapor pressure of the mixture is determined for the light fractions.

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