Design of Metal Seated Ball Valve Mechanism

• Main Authors: Chia-Yang Chang, 張嘉揚
• Other Authors: Ching-Huan Tseng
• Format: Others
• Language: en_US
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/69121228135912919546

碩士 === 國立交通大學 === 機械工程系 === 88 === A seat is a device mounted in a valve. When a ball valve is in close position, the seat makes a sealing effect in a ball valve. The seat material is usually plastic or rubber, so the seat will be damaged under high pressure or high temperature environment. The objective of this study is to design a new seat mechanism suitable for the ball valve. Related U.S. patents are surveyed for references during the design process. To design a new metal seat, there are four steps, arranged in the engineering design process: planning and clarifying the task, conceptual design, embodiment design, and detailed design. Some useful tools from Quality Function Deployment (QFD) technique and Theory of Inventive Problem Solving (TRIZ) method are used in design process. The prototype model is complete by using CAD and CAE software. Finally, a new prototype of metal seat in a ball valve is manufactured.