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 build 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. ![]()
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