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This book discusses two classes of activities: preventive procedures and corrective steps. Sometimes these two activities are so intimately connected that it is impossible to separate one from the other.
Also, to execute these activities properly, an in-depth knowledge and understanding of centrifugal pump operation and diagnostic procedures is required.
The pump designer must adopt preventive steps to keep the possibility of failure at a minimum.
A pump must be selected carefully for each application and the system of which it is destined to be a part must also be designed carefully.
Preventive damage control also requires great care in the manufacture, installation, and maintenance of a pump.
The corrective procedures are related to diagnosing the cause of the malfunction and taking the proper steps to correct the problem.
Implementing corrective and preventive procedures requires an in-depth knowledge of what makes a pump operate satisfactorily and what affects its operation.
It also requires a wide knowledge of how different factors can affect the performance of a given pump.
The objective of this book is to provide the reader with the information required to prevent, diagnose, and solve the widest possible spectrum of problems encountered with centrifugal pumps.
Because of the wide range of problems dealt with in this book, it may prove to be of great assistance to a very diverse group. It is intended to:
1. Explain to pumping system designers how the layout of the suction fump, the suction line, and the discharge line can affect pump performance.
2. Identify problems pump deSigners must take into account in order to incorporate proper preventive and safety features that will make their designs more competitive.
3. Describe the characteristics of materials and workmanship that are crucial for turning out a good product. This will help quality-control and production personnel establish and maintain the delicate balance between cost and quality.
4. Help those concerned with the selection and purchase of pumps make the best choice.
5. Make it easier for maintenance personnel to determine and locate the source of any problem and provide gUidelines for handling these problems.The book also outlines steps that may be taken when a pump has to operate under unanticipated conditions.
6. Caution personnel responsible for installing pumps and the pumping system about problems they may create by not following correct installation procedures.
7. Provide pump attendants with a better understanding of how the equipment functions and how to identifY signs of developing malfunctions.
This book may be of interest and assistance to people with different levels of education and training. We therefore start with a review of some of the most basic principles on which centrifugal pump operation is founded.
This has been done for the purpose of making this book accessible to those who may not be familiar with these principles. People who are familiar with the problems discussed in the introductory part of this book may safely skip it and start directly with the more advanced topics.
Troubleshooting is, to a great extent, the ability to deal with unforeseen events. This book tries to deal with as many situations as possible.
Most problems can be solved simply by consulting the checklists and following the instructions without worrying about the analytical background. On the other hand, unique problems are always possible.
These cases are often very difficult to analyze and solve. In such cases, an in-depth understanding of the most basic principles can be of great help in finding the proper solution
