Our DRV static balance valve is a flow regulating valve for the liquid pipeline, which can regulate the flow easily and accurately so as to solve such problems existing in the pipe network system effectively as uneven temperature and hydraulic unbalance. It not only boasts good regulating performance but also is provided with opening display and opening functions, which is widely used for heating and air-conditioning systems as well as other liquid pipeline systems requiring the flow regulations. It is energy-saving noticeably as it is also mounted with flow pressure measuring valvelets, which is available for one-step debugging with an intelligent meter to control the total flow in the system within a reasonable range to balance the pipe network.