Valve is an indispensable general mechanical product in industry and life. Introduction and Mastery of Valve Design systematically and practically introduces the knowledge of valve design and calculation, valve sealing principle and basic structural characteristics, valve materials, valve standards and so on. Which college graduates only have university scientific and technological knowledge, but they can't master it in depth. Introduction and Mastery of Valve Design is a valuable supporting professional teaching material for self-study and training of technicians engaged in valve design and manufacture. "Introduction to Valve Design and Proficiency" can be used as a teaching material for self-study and enterprise training of engineering and technical personnel engaged in valve design and manufacture, and can also be used as a teaching reference book for teachers and students in related professional colleges.