In heavy-duty, high-frequency operation scenarios of Zoomlion equipment, this hydraulic valve can stabilize the operating status of the hydraulic system. For example, during concrete pumping operations, it can stabilize the oil circuit pressure and avoid uneven concrete pouring caused by pumping interruption or pressure fluctuations; when a crane lifts heavy objects, it can prevent the heavy objects from accidentally slipping by precisely locking the oil circuit and controlling the pressure. In addition, it may also work with auxiliary functions such as overflow to automatically release pressure when the system pressure exceeds the limit, reducing the risk of equipment failure.