KPF balance valve is have special function control valve, have good flow rate feature, can resonable assign flow rate, achieve flow rate fixed, can effective slove problem of heat supply(air conditionor) system exist house temp. uneven. This valve have open position indicator, open position lock device and small valve for flow rate test, so only need install proper balance valve on each brance pipe and client inlet, and use special intelligent meter lock after one-off regulation, make system total water volume controlled in reasonable range, so avoid unreasonable case of“large flow rate, low temperature drop”This product is a desired product for heat supply system. KPF balance vlave not only can be installed on water supply pipe, installed on water return pipe also is available, normally we advise installed on water return pipe, especially for high temp. circle pipeline, in order to easy degug, installed on water return pipe is more requested, don't need install globe valve again when the water supply(return)pipe already install balance valve.