Special thread for discussing online calibration of safety valves: 1. How many types of safety valves are there in total? Reply for a prize

Thank You Shutong, thank Uncle Dong, Xue*, let’s move forward.

Weight lever type, weight slightly lifted type

Spring-type {:9001:}

This post was last edited by Shutong on 2023-2-7 at 13:14. These are some things I know personally; everyone is welcome to add more – there will be rewards! Classification of safety valves: 1. Classified by the type of load acting on the valve disc: lever-pendulum type and spring type (these two are the most widely used in power plants). 2. Classified by principle of action: direct-acting and indirect-acting (pulse-type safety valves are common in power plants). 3. Classified by the opening degree of the closing element: slightly open type (mainly used for liquid media) and fully open type (mainly used for steam or gas media). 4. Lever-weight type safety valves classified by structure ； Spring-loaded safety valve ； 5. Pulse safety valves classified by seating method ； Electromagnetic pressure relief valve. 6. Pilot-operated safety valves used in long-distance pipelines. 7. Commonly used in tank farms: gravity plate-type safety valves. Please add others if you know any! !

First type: Direct unloading safety valve (weight, lever-assisted weight, spring)； Second type: Balanced safety valve. Third type: Pilot-operated safety valve. Fourth type: Safety valve with power assist device