This is a very informative and officially released publication specifically addressing the VFDs, standing for the "variable frequency drive"s; and the volume was prepared by the recognized specialists of the world-known SKF Company. The use of subject drives is constantly increasing, and that is mostly because of their cost effectiveness.
The makers of these drives have all significantly and so valuably contributed to the above mentioned development by making subject equipment much better and reasonably affordable, and this was done by introducing the PWM - standing for the pulse width modulated - drives. However, it should of course be understood that, along with this newly introduced technology, some more premature bearing technical failures occurred; moreover, increasing number of electric motors fail prematurely.
The main declared reason of these premature failures in the mentioned electric motors was electrical erosion. Dismounted bearing will be showing evidence of the electrical erosion - for example, the grease of the motor is also affected same way the other bearing components are.
One of the proposed ways to diagnose the electrical erosion implies using the oscilloscope with a contact probe on a rotating shaft, however bear in mind that this way is considered expensive and too time-consuming, thus very impractical...
The control valves are considered vital components of the modern manufacturing, and their significance importance is constantly increasing. It is very important to perform proper selection and maintenance of the control valves in order to get the safety, efficiency, ecology and profitability increased and maintained at high level. The present volume shall serve as a primary reference source since the time of the original printing several decades back.
And this fourth release of the book is presenting the vital technical information related to the performance of these valves and the recent developments. The first chapter offers a brief introduction to the valves, providing the commonly used definitions for the applied terminology. The second chapter is developing the topic of the valve performance, while the third chapter is covering the control valves together with the types of actuators. The following chapter provides the descriptions of the analog positioners and digital controllers, boosters and some other accessories, while the fifth chapter contains a concise yet truly comprehensive guidance to the selection of the best valves for the particular applications.
The remaining chapters provide the required information about the desuperheaters and bypass systems, installation and maintenance procedures to be followed, recognized standards and agencies entitled to approve the design and construction of the control valves, piping reference data, common conversions and engineering reference data tables. The volume shall be used as the reference book and also as a textbook...
The purpose of this book is to provide a basic understanding of the compressed air systems, equipment, and technologies that are available on the market today. You might have many years of experience with a specific compression system, but the catalogs and sales literature just aren't providing you with the information you need.
Maybe you've just been assigned the compression system as part of your responsibilities and you have no experience whatsoever with this type of equipment. Oftentimes, the compressors are the bastard child of a company's capital equipment and no one in particular is responsible for them. If you head up the company's maintenance department, the compressors probably fall under your responsibilities.
You may be a salesman who works with pneumatic-powered equipment and, from time to time, are asked to comment on your customer's compression systems. In any case, this book will give you the baseline information that will allow you to make well-informed decisions about specifying, expanding, or assessing a compression system.
Like many technical people, I felt that I had a clear conceptual understanding of air compression, I mean, what's to know? You suck in some air, you smash it into a tank. Simple! I even built an air compressor from an old auto AC pump and a piece of pipe when I was in high school.
This interesting and practical volume has been intended to cover both types of pumps, namely rotary and centrifugal pumps, and offer the learners of engineering and, in fact, all of the involved industry participants a concise yet enough detailed reference tool touching all aspects of the design, technical performance, and main operating principles of the different types of pumps.
The author has made a brilliant attempt to address all areas, starting from the brief historical overview and to the very latest developments and recent technological trends, focusing primarily on the information that would bear the practicality and applicability to the real-world situations, as well as to the techniques that the users could implement immediately. The text part starts with the chapters providing readers with some fundamental technical knowledge required to understand how pumps are working. Then, there are some illustrative and informative practical case studies that address the pumpage, pump system interaction, applications, reliability of the pumps, together with the popular practical solutions proven effective, failure analysis methods etc.
This truly comprehensive title also includes the critical specification parameters and applicable criteria for various types of pumps. The materials provided in the volume will definitely be of great practical use to all members of the maintenance staff.
This handbook has been specifically designed and published for the boiler operators having some basic knowledge and professional experience, but still willing to learn more to get his performance optimized. The material contained in this publication is presented very clearly, that is why this volume could be recommended to the industry workers to serve as a practical guide, especially for those who are making their first professional steps.
However, we would equally recommend this publication to the technical superintendents and managers who are interested in cost saving through reduction of the operating expenses of their facilities. The text of this handbook bases on the forty years of professional experience of the author, Ken Heselton, in operating the boiler plants, design and construction of boilers, as well as their start-up, periodical technical maintenance and retrofit. The publication contains the fundamental recommendations to the operators and managers of both small and large plants.
According to the reviews provided by the readers of the book, it was definitely prepared by someone who has actually been in the trenches and who knows and understands what exactly it means to run a boiler plant, to maintain all associated equipment and is fully aware of the relevant operational procedures.
The present training course program has been developed for marine engineers and ship deck officers who are involved in the management and day-to-day operation and maintenance of the BWT, i.e. bilge water treatment systems on board marine vessels. The declared purpose of this program is to update the technical knowledge of the existing relevant regulations and treatment techniques relating to the bilge water.
The authors of the course have particularly emphasized numerous practical exercises on the management/operation of bilge water in order to demonstrate the expertise and due understanding of both treatment and disposal of bilge water. Among the topics covered within this publication there are oily water treatment techniques, monitoring systems, applicable regulations, PSC inspection, correct management of the oil record book and other important aspects.
The main objective of the present training course is to upgrade the relevant technical skills and knowledge of the learners. Trainees who have completed this training would be able to explain the fundamental principles of MARPOL Annex I, understand the methods of physical and chemical bilge water treatment, correctly fill in the ORB, explain how PSC inspections are done, and know the role and attitude of the seafarers in preventing the pollution.
This publication would be recommended to anyone whose working activities imply dealing with the pumping arrangements. The publication covers different types of pumps used in the industry and provides comprehensive and understandable explanations of their working principles and construction. This is a very valuable textbook and reference source giving an excellent general overview of pumping machinery and hydraulics.
The text has been supplemented by numerous informative diagrams, data tables and images included to be of help when explaining the theoretical basics of the pumps and their practical applications. And note that this book is the best choice for those who are willing to understand much more than just a simple pump curve - they fill find all the information they require in one single volume covering the components of the pumps and all technical aspects involved. The material presented in the book is remarkably detailed and technically correct making the book deservedly popular in the industry.
All information provided on the pumps is up-to-date and will benefit any worker involved in mechanical maintenance of the subject machinery. The reader will learn how to properly install and maintain all types of pumps, get the fundamental knowledge of the operating principles and application of the pumps in robotics and other new fields, find some useful installation and troubleshooting tips and all other information.
We are presenting maybe the most popular and useful publication on air conditioning arrangements. Among the key improvements of this latest release of the volume we would definitely mention the expanded info on various relevant environmental problems, asbestos-related info, weather data and so many other improvements when compared to the previous edition.
The text part of this volume is pretty good and understandable. The explanations are pretty straightforward but, at the same time, the author does not go too deep into the theory. The minimum of math has been used. It should be noted that the publication is exploring the very fundamental technical concepts of the air conditioning and the author explains them in quite clear and manner. The main focus has been made on the problems and practical examples that are commonly found on the job. The book includes the updated info on the design, associated calculations, equipment data. Some of the chapters are covering the main scope of air conditioning and its uses.
The volume will be very useful for mechanical engineers providing consultations, professional HVAC engineers, designers of such systems, any personnel involved in the maintenance/repair of these systems, and, of course, the students and just any persons with the interest in the subject field.