Selection of hydraulic balance devices for secondary pipe networks in variable flow systems

Analyses the effect of static balance valves and self-operated pressure control valves on the actual bearing pressure drop of thermostatic valves in the variable flow system. Points out that the static balance valve and the self-operated pressure control valve have the limitation of withstanding pressure difference in regulating process of the thermostatic valve. Combined with the valve characteristic parameters, puts forward the selection principle of the static balance valve and the self-operated pressure control valve in pipe network design, providing references for design and retrofit of the variable flow system.