The safety valve is an important equipment for overpressure protection.With the rapid devel-opment of the process,higher requirements are put forward for the safety valve.Firstly,this paper sum-marizes the basic structure and difference of spring-loaded and pilot-operated safety valves,and ex-pounds the standard requirements of daily calibration and maintenance of safety valves.Then,the appli-cable working conditions,structural characteristics and application prospects of four new pilot-operated safety valves,including low-temperature pilot-operated safety valve,all-plastic sealed safety valve,independent gas source control safety valve and all-metal sealed safety valve,are analyzed in depth.These new safety valves have their own characteristics and meet the requirements of overpressure pro-tection under different working conditions.Finally,this paper analyzes and discusses the maintenance and calibration problems that may be encountered in the popularization and application of these four new structural pilot-operated safety valves,aiming to provide useful reference and guidance for practi-cal applications.
关键词
先导式安全阀/应用/维修/校验
Key words
pilot operated pressure relief valve/applications/maintenance/checkout
维普
万方数据