Balance valves are suitable for various liquid pipeline systems and are an ideal new type of energy-saving valve. This valve is mainly used in industrial and civil heating pipeline systems. At present, there is a problem of hydraulic imbalance in some pipeline systems, and balance valves provide a means to solve this problem. They can accurately adjust pressure drop and flow rate to improve the liquid flow situation in the pipeline system, achieve liquid balance in the pipeline system, and save energy. A fluid circulation heating or cooling system is a system that controls the flow rate of the system according to strict and precise requirements through a balance valve, providing sufficient heating or cooling capacity to various parts of the building with optimal efficiency and reducing energy consumption, resulting in a comfortable and uniform temperature throughout the building and creating a comfortable indoor environment.