KPF balance valve is a kind of regulating valve with special functions. It has good flow characteristics, can reasonably distribute the flow and realize the quantitative flow. It can effectively solve the problem of uneven cooling and heating at room temperature in heating (air conditioning) system. Since the valve is equipped with opening indication, opening locking device and small pressure measuring valve used for flow measurement, as long as the balance valve of appropriate specification is installed in each branch and user's inlet, and the special intelligent instrument is used for once debugging and locking, the total water volume of the system is controlled within a reasonable range, so as to overcome the unreasonable phenomenon of "large flow, small temperature difference". The product is an ideal product in heating system. KPF balance valve can be installed on both the water supply pipe and the return pipe. Generally, we suggest that it should be installed on the return pipe, especially for the high-temperature loop. For the convenience of debugging, it should be installed on the return pipe.