This book mainly describes the types, styles, technical characteristics and technical specifications of industrial special valves, which are suitable for power stations, metallurgy, petroleum, chemical, light industry, textile and urban construction departments. The valves described in this handbook have a complete range of specifications (nominal diameter from 4mm to 5350mm), high pressure rating, high temperature resistance, wear resistance and corrosion resistance, which can meet the requirements of industrial production process. This book is mainly for engineering technicians of design institute, operation unit and construction unit of power station, metallurgy, petroleum, chemical, light industry, textile and urban construction departments, and students of higher education institutions can also refer to it.