Pressure relief device 

A device used to prevent the internal medium pressure of a pressure vessel from rising above the predetermined high pressure in case of emergency or abnormal conditions. 

2. Performance of Actions and Batch Testing 

The test used to determine the operational performance and actual discharge capacity of the sanitary ball valve discharge device. 

3. During the experiment 

When the sanitary ball valve device is installed on the system and is protecting the system, tests to determine certain or all of its working characteristics are conducted by solely utilizing the system pressure or by combining it with auxiliary opening devices or other pressure sources. 

4. Pressure test on the workbench 

The tests conducted on a pressurized system to determine the set pressure of the pressure relief device and the sealing performance of the closure element.