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Metal rotor flow meter
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Details
A metal rotor flowmeter is a commonly used flow measurement instrument:
Working principle
Based on the upward and downward movement of a float in a vertical conical tube due to the effects of fluid buoyancy and gravity, the float's position reflects the flow rate. When the fluid to be measured flows upward through the conical tube, a differential pressure is generated on the upper and lower surfaces of the float, creating an upward force that causes the float to rise. As the float rises, the annular flow area between the float and the conical tube increases, and the fluid flow rate decreases, reducing the differential pressure. When the buoyancy force on the float is balanced by its weight, the float stabilizes at a certain height, and this height corresponds to a specific flow rate.
Structural features
It mainly consists of a conical tube, a float, a guide rod, and a shell. The conical tube is generally made of high-precision glass or metal materials, with good transparency or corrosion resistance. Floats come in various shapes, commonly spherical or cylindrical, and are usually made of stainless steel, copper, or other metals to ensure stability and corrosion resistance in different fluids. The guide rod guides the float to move vertically within the conical tube, ensuring measurement accuracy. The shell protects the internal components and facilitates installation.
Performance advantages
It has advantages such as high measurement accuracy, good repeatability, wide measurement range, low pressure loss, and insensitivity to changes in fluid viscosity. It can measure various fluids, including liquids, gases, and steam. At the same time, it has a simple structure, is easy to maintain, has a long service life, and is suitable for flow measurement in various industrial settings and laboratory environments.
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