This is a definitive guide to valve selection. It covers the fundamentals of valve construction and application, and analyzes the different hazards and requirements of all types of industrial fluid flow situations. This edition expands the coverage of pressure relief values and rupture discs and includes a new section on valve chatter which is a serious problem in installations such as atomic power plants where valve chatter could have catastrophic consequence to the safety of a plant. In addition, there is also information on performance of spring loaded pressure relief valves and a closer examination of valve selection with respect to rupture discs and explosion venting.