Description

The venturi tube is a differential pressure producing flow device that is used to measure flow rate through a pipe. Pressure difference between the pressure measured at high pressure connection and low pressure connection is proportional to square of the flow rate through the flow device. It is often used to measure gas, liquid, steam, and dirty fluids. Venturi tube has less pressure loss than orifices and nozzles. Upstream straight pipe requirements for venturi tube are less than orifices, venturi nozzles and flow nozzles.