![]() ![]() Small-size venturimeter are made of brass, glass, or bronze and large venturimeters are made of cast iron, steel, or stainless steel. British Standard BS-1042 specifies two conical angles, 5–7 0 and 14–15 0 for the outlet cone. So, the pressure is built up again to the original inlet pressure. Diverging Conical section: At this section of venturimeter, the tube diameter gradually increases.Normally, throat diameter = 1/3 to 1/4th of inlet pipe diameter. ![]() In the throat section, the velocity is maximum and pressure is minimum. Cylindrical Throat: Throat consists of the minimum venturemeter diameter. ![]() While the liquid flows inside the venturimeter, the velocity of fluid increases at the expense of a decrease in pressure. The conical angle is normally 21 0 ± 2 0. Convergence Conical Section: In this section, the venturi meter tube diameter gradually decreases.Cylindrical Entrance Section: Venturimeter entrance is a straight cylindrical section with a length equal to 5 to 8 times the pipe diameter.So, the venturi meter is a differential head type flowmeter that converts pressure energy into kinetic energy. ![]() The pipe cross-sectional area is reduced to create a pressure difference which is measured with a manometer to determine the rate of fluid flow. This device is widely used in the water, chemical, pharmaceutical, and oil & gas industries to measure the flow rates of fluids inside a pipe. Venturimeter is a type of flowmeter that works on the principle of Bernoulli’s Equation. What is a Venturimeter? Venturimeter Definition
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