Safety valve is an automatic pressure relief device used on pressurized equipment, containers, or pipelines. When the pressure inside the protected system increases beyond the allowable value, the valve automatically opens to discharge some excess medium to prevent the system pressure from continuing to rise. When the system pressure drops to a certain specified value, the valve can automatically close to ensure the normal operation of the system. For Electric Operated Diaphragm Pumps, it is recommended to install a safety valve to avoid damage to the bearings, as the outlet or pipeline may be blocked or the outlet valve may not be open.