Venturi tube is a low-pressure-drop metering device identifiable by its tapered inlet, tapered outlet and straight constricted middle section. Also the venturi tube is the most accurate flow-sensing element when properly calibrated.
Because of being corrosion resistant and ease of inspection, this measuring device performs in a wide variety of application such as air, water, vapor, steam, gas, chemical substances, and sludge and slurry applications.
Venturi tubes are not as reliable at lower Reynolds number as chart below.
Classical Venturi Tube
ASME MFC-3M (R.W Miller)
JIS 10, 16, 20, 30, 40, 63
ANSI Class 150, 300, 600, and 900, 1500, 2500
Standard: Carbon Steel, 304SS, 316LSS
Machined Throat As Cast Fabricated as Weld
2 to 48 inch