In order to solve the problem of heating imbalance caused by slag plug and gas blockage in domestic heating system for a long time, the world's largest dirt separator developed and manufactured by ZECO specially for Beijing Heating Group was successfully installed and debugged in Beijing on October 23, 2018. This valve solves the problem of energy consumption and equipment damage caused by small particle impurities that cannot be removed in large-diameter pipeline, and provides customers with cleaner medium to further achieve the effect of energy saving.