Sanitary safety air pressure relief valve is a valve mechanism for the automatic release of a substance from a boiler, pressure vessel, or other systems when the pressure or temperature exceeds preset limits. Containers used in the following situations must be fitted with safety valves: 1. An independent pressure system (with a shut-off valve separated from other systems) needs to install a safety valve. The system refers to all gas phase, all liquid phase or gas phase communication; 2. When there is no safety valve at the source of the pressure material of the container, the container must be equipped with a safety valve; 3. Containers and pipelines whose design…