◆ It is installed in the starting pipeline to prevent the pressure accumulation in the pipeline caused by the slow gas leakage of the starter cylinder unit, which may cause spurious trip of the fire extinguishing system. If the starter cylinder unit leaks, the gas can be released through the valve when the pressure is low (gas not accumulated). If the starter cylinder unit is opened, the valve will automatically close to ensure the normal operation of the fire extinguishing system when the pressure exceeds the closing pressure.