Resumen
System for measuring water flow with butterfly keys. The invention is framed in pressurized water distribution systems, defining a tool to know the pressure and flow rate in a pipe in which a throttle valve is established. The system makes the measurement of the difference in piezometric height between a gauge point (1-1'-1 ''), located upstream of the operculum axis (3) of the butterfly key, and a gauge point (4-4'-4 ") downstream of the operculum. The gauging points can be arranged in different positions, such as immediately upstream of said operculum axis (3), and in correspondence with the posterior part of the operculum (3), in a zone immediately before the operculum (3), and on one side of the pipe, or on the flange holder or connection spool of the upstream faucet and on one side of the flange holder itself downstream of the operculum. (Machine-translation by Google Translate, not legally binding)