Research progress of high temperature valves

LIN Zhenhao, QIAN Jinyuan, LI Wenqing, JIN Zhijiang
(Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China)

Abstract: Aiming at the safety problems caused by high temperature valves working under high temperature conditions for a long time, the state-of-the-art of high temperature valves was reviewed from the structural design and the structural strength of high temperature valves. The structural improvement methods of moving parts and sealing parts of high temperature valves were briefly introduced. The mainstream methods of structural strength research of high temperature valves were introduced. The research on thermal stress and thermal fatigue of high temperature valves were reviewed. The results indicate that the development and research trend of high temperature valves in the future, which including improving the moving parts and sealing parts from technology for heating processing or hardfacing procedure, bidirectional coupling method for high temperature valve strength analysis under high temperature conditions, high temperature valve safety evaluation specification considering thermal stress, the development of computer technology is combined with the optimization algorithm of mechanics in the structural optimization of valve body.
Key words: high temperature valve; thermal stress; thermal fatigue; structural optimization; research progress