Table of Contents
I. Introduction.- 1. Rotodynamic Pumps.- 2. Performance Chracteristics of Centrifugal Pumps.- 3. Classification of Centrifugal Pumps.- II. Performance Factors.- 4. Effects of Free Air in the Pumped Liquid.- 5. Cavitation.- 6. Cavitation in Centrifugal Pumps.- 7. Losses of Energy.- 8. Effects of Temperature and Viscosity on Pump Performance.- 9. Recirculation.- 10. Axial and Radial Thrust and Balancing.- 11. Miscellaneous Factors that Affect Pump Performance.- III. Problems Encountered with Centrifugal Pumps.- 12. Testing.- 13. Pump Performance at Reduced NPSH.- 14. Pumping System Layout.- 15. Installation, Handling, and Operation of Pumps and Pumping Systems.- 16. Problems with Bearings.- 17. Sealing Rotating Parts.- 18. Miscellaneous Studies.- 19. Problems Related to Specific Circumstances.- 20. Special Cases that Have Proven Very Difficult to Solve.- IV. Solving Pump Problems.- 21. Solving Problems Prior to Visiting the Site.- 22. Conclusions Drawn from Visual Inspection of Failed Parts.- 23. On-Site Inspection and Testing.- V. Eliminating Pump Problems and Modifying Performance.- 24. Remedial Methods.- 25. The Effects of Speed and Impeller OD on Pump Performance.- 26. The Effects of Reducing the Impeller Width.- 27. Modifying the Casing Geometry.- 28. Various Methods of Altering Pump Performance.- VI. A Glimpse of the Future.- 29. New Findings Concerning the Mode of Operation of Rotodynamic Impellers.- 30. Some Future Applications of the Presented Theory.- 1. Pump Does Not Develop Any Head, Nor Does It Deliver Liquid.- 2. Pump Develops Some Pressure, but Delivers No Liquid.- 3. Pump Delivers Less Liquid Than Expected.- 4. Pump Does Not Develop Enough Pressure.- 5. Shape of Head-Capacity Curve Differs from Rated Curve.- 6. Pump Consumes Too Much Power.- 7. Pump Does Not Perform Satisfactorily, Although Nothing Appears to be Wrong with Pumping Unit or System.- 8. Pump Operates Satisfactorily During Start, but Performance Deteriorates in a Relatively Short Time.- 9. Pump is Operating with Noise, Vibrations, or Both.- 10. Stuffing Box Leaks Excessively.- 11. Packing Has Short Life.- 12. Mechanical Seal Has Short Life.- 13. Mechanical Seal Leaks Excessively.- 14. Bearings Have Short Life.- 15. Bearings Overheat.- 16. Bearings Operate with Noise.- 17. Pump Overheats, Seizes, or Both.- 18. Impeller or Casing, or Both, Has Short Life.- 19. Loud Blow is Heard Each Time Pump is Started or Stopped.- 20. Casing Bursts Each Time Pump is Started or Stopped.- 21. Gaskets Leak During Pump Operation.- 22. Flow-Rate Periodically Decreases, or Stops Completely, then Returns to Normal.- 23. Pump Develops Cavitation when the Available NPSH is Increased.- Vapor Pressures of Water at Different Temperatures.- Gall Resistance of Material Combinations.- Packing Selections.- Tables of Chemical Compatibility of Materials.
