Valves – How Industrial Components Work
A control valve is a valve used to control the flow of fluid by varying the size of the flow passage as directed by a signal from a controller
This allows direct control of flow rate and consequent control of process quantities such as pressure, temperature and liquid level.
In automatic control terminology, a control valve is called a “final control element”.
More about valves
Consult valves and spare parts at Unitec:
https://www.unitecd.com/e-catalog/description-articles/?lingua=GB&category=Valve&prm=ric_ft
Buy books
Electric Motors and Drives: Fundamentals, Types and Applications
Best-selling reference on Electrical Motors and Drives for non-experts, bridging the gap between mathematics and theory.
Mechanical Design of Electric Motors
Rapid increases in energy consumption and emphasis on environmental protection have posed challenges to the motor industry, as has the design and manufacture of highly efficient, reliable, economical, energy-saving, quiet, precisely controlled and durable electric motors.
Suitable for motor designers, engineers and manufacturers, as well as maintenance personnel, undergraduate and postgraduate students and academic researchers, Mechanical Design of Electric Motors provides in-depth knowledge of the design methods and state-of-the-art developments of electric motors. From motor classification, motor component design, model configuration, material and bearing selection to power losses, motor cooling, design integration, vibration and acoustic noise, this comprehensive text covers the fundamentals, practical design and issues related to the design, modeling and simulation, engineering analysis, manufacturing processes, test procedures and performance characteristics of today's electric motors.
Focusing on the mechanical design of modern electric motors, the book:
Details the design and manufacturing of key components and subsystems, such as rotors, shafts, stators and frames
Reviews various cooling techniques, including forced air, liquid, and phase change
Discusses the analysis and calculation of engine power losses
Addresses engine vibration and acoustic noise issues
Presents engineering analysis methods and case study results
Emphasizes construction, optimization and applications
Featuring research results from the author's personal experience and the significant contributions of others, the Electric Motor Mechanics Project highlights innovative and advanced electric motors developed over the past few decades.
Mechanical Design of Electric Motors
The importance of electric motors is well known in various fields of engineering. The book provides comprehensive coverage of the various types of electric motors, including d.c. motors, three-phase and single-phase induction motors, synchronous motors, universal motor, a.c. servo motor, linear induction motor, and stepper motors. The book covers all the details of dc motors, including torque equation, back electromotive force, characteristics, starting types, speed control methods and applications.
The book also covers the various testing methods of d.c. motors such as Swinburne test, brake test, retardation test, field test and Hopkinson test. The book also explains three-phase induction motors in detail. Includes rotating magnetic field production, construction, functioning, effect of slip, torque equation, torque ratios, torque-slip characteristics, losses, power flow, equivalent circuit, effect of harmonics on performance, circle diagram and applications. This chapter also includes discussion of the induction generator. The book teaches the various starting methods and speed control methods of three-phase induction motors. The book incorporates the explanation of various single-phase induction motors. The chapter on synchronous motor provides detailed discussion on construction, working principle, behavior under load, phasor diagram analysis, Vee and Inverted Vee curves, oscillation, synchronous condenser and applications. The book also teaches various special machines such as single-phase commutator motors, universal motors, AC servo motors, linear induction motors and stepper motors. The book uses clear, lucid language to explain each topic. The book provides the logical method of explaining the various complicated topics and step by step methods for easy understanding. Each chapter is well supported with necessary illustrations, self-explanatory diagrams and variety of solved problems. The book explains the philosophy of the subject, which makes understanding the concepts very clear and makes the subject more interesting.
Engine Starting and Control Manual: An introduction to electric motor starting and control techniques
Whether you're a busy electrical engineer needing to brush up on motor starting, a time-poor student new to the subject, or an interested person with an hour to spare, this book is the place to start. Steven McFadyen shares his expert knowledge about engine starting in a clear, easily accessible way, without time-consuming verbiage or self-aggrandizing discussions. Complete with circuit diagrams and thorough explanations of the most common motor starting methods and associated challenges, this book is an invaluable reference. It has something to offer anyone eager to learn new things, while at the same time helping practicing electrical engineers design and implement reliable and functional motor starters.
