Part of a series of Introductory Guides aimed at engineers requiring information on aspects of engineering outside of their own areas of knowledge, this book is designed to give an understanding of the types of pumps available, their operating principles and the way they interact, along with the necessary background to enable the engineer to assess information from manufacturers and to make a useful contribution to technical discussions. The approach used assumes some basic knowledge of fluid mechanics, but deals with all the essential equations in context. This text should be of interest to practising engineers and technicians in industry, to design engineers and to consultants, researchers, teachers and students.