Mass flow regulator for use with low pressure water flows uses a second control fluid connected to the central part of a venturi for regulating the primary water flow to adjust the pressure drop across it

摘要

Device for controlling flow rate comprises a venturi (1) connected by a tube (2) to control means (3). The venturi comprises a upstream nozzle (4), a central zone (5) and a downstream diverging nozzle (6). The central zone has a connection (7) to the control means and a second fluid that is used to adjust the pressure drop of the first fluid across the venturi.