Japanese standard stainless steel safety valve A21, A42, A48

The safety valve is an automatic pressure relief protection device opened by inlet static pressure. Its function is to quickly discharge a certain amount of medium when the pressure in the container exceeds a certain value. When the pressure in the container drops to the allowable value, the pressure in the container is always lower than the upper limit of the allowable pressure, so the safety valve is also called the final protection device of the pressure vessel. Safety valves can automatically open and close based on working pressure and are generally installed on equipment or pipelines in closed systems to protect system safety. Safety valves are automatic valves that control the pressure not to exceed the specified value. Its opening and closing parts are in a normally closed state under the action of external force. When it exceeds the specified value, it automatically opens. The medium leaks out and reduces the pressure. When the pressure returns to the normal value, the valve Automatically shuts down. The function of safety valves is to prevent the medium pressure in pipelines or devices from exceeding a specified value