Static balance valve is a kind of special functions with digital lock modulating valves, DC-type body structure, with better equal percentage flow characteristic that can be reasonably allocated traffic, effectively solve the heating （air conditioning） systems exist Enthusiasm temperature problem. At the same time able to accuray adjust the pressure drop and flow rate, the pipe network system to improve the flow of liquid state, to the pipe network source fluid balance and conservation purposes. Valve opening degree with instructions for opening and locking device for flow measurement of small pressure valve, as long as the user entry in each branch and the balancing valve fitted with appropriate specifications and inligent instruments with special one-time debugging lock, the total amount of water control system in a reasonable range, thus overcoming the "big flow, small temperature difference" unreasonable phenomenon.