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Net Positive Suction Head For Rotodynamic Pumps : NPSH for Rotodynamic Pumps - A Reference Guide - European Association of Pump Manufacturers

Net Positive Suction Head For Rotodynamic Pumps

NPSH for Rotodynamic Pumps - A Reference Guide

Paperback Published: 27th May 1999
ISBN: 9781856173568
Number Of Pages: 88

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Cavitation, the result of insufficient pressure in a pump inlet, is not only the major cause of loss in pump performance, but also of reduced cost effectiveness. This practical guide provides straight forward, up to the minute advice on all aspects of cavitation and NPSH, enabling the end user to improve all the factors involved. Prepared by Europump - European Association of Pump Manufacturers - this book contains the results of years of research work and practical experience by leading European educational institutions and pump manufacturers to give a valuable unbiased guide which is applicable to all types of rotodynamic pumps and related systems.

A Reference Guide
Preface
Introduction
Importance of inlet conditions
Cavitation
Effects of inadequate suction conditions
The Concept of NPSH
Pressure profile along the streamline
Definition of NPSH
Practical definition of NPSH
Other qualifying criteria for NPSH
Governing Parameters
Effect of speed and capacity
Effect of pump geometry
Effect of impeller trim
Effect of pumped liquid
Effect of inlet piping
Effect of pump material
Suction Specific Speed
Safety Margins Between NPSHR and NPSHA
Practical Determination of NPSHR
Determination of NPSHA
Atmospheric pressure
Reference level
Temperature and vapour pressure
Velocity head
Measurements from Bourdon gauges
Conversion from pressure to head
Examples of Calculations of NPSHA
Pump under positive head and liquid under atmospheric pressure
Pumps under negative head and liquid under atmospheric pressure
Liquid level under positive pressure and pump below the liquid level
Liquid level under positive pressure and pump above the liquid level
Liquid level under negative pressure and pump below the liquid level
Liquid level under negative pressure and pump above the liquid level
Liquid level under the vapour pressure of the liquid
Other Phenomena
Suction recirculation
Corrosion
Submergence under a free surface
Air or gas entrainment
Dissolved gases
Conclusions
Terms, Symbols, and Units
Appendices
Table of Contents provided by Publisher. All Rights Reserved.

ISBN: 9781856173568
ISBN-10: 1856173569
Series: European Guides to Advanced Pumping Technology
Audience: General
Format: Paperback
Language: English
Number Of Pages: 88
Published: 27th May 1999
Publisher: Elsevier Science & Technology
Country of Publication: US
Dimensions (cm): 21.59 x 13.97  x 0.43
Weight (kg): 0.11