
Venturi tube flow meter - Flow measurement with primary element
The venturi tube is a method of measuring fluid flow using a cylindrical depressurizer with a constriction. As a fluid flows through the tube, its flow rate increases due to the restriction. The pressure difference between upstream and downstream is proportional to the flow rate.
ANSI/ASME MFC-3M
Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi
ISO 5167-1
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
ISO 5167-4
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 4: Venturi tubes
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