Introduction and Features of Tube Rotameter

The rotameter measures the fluid flow according to the throttling principle, but it changes the flow area of ​​the fluid to keep the differential pressure above and below the rotor constant, so it is also called a variable flow area constant differential pressure flowmeter, also known as a float flowmeter.

In a vertical conical tube that expands from bottom to top, the gravity of the circular cross-section float is borne by hydrodynamic forces, and the float can rise and fall freely within the conical tube. It moves up and down under the action of flow rate and buoyancy, and after balancing with the weight of the float, it is transmitted to the dial to indicate the flow through magnetic coupling. Generally divided into glass and metal rotameters. Metal rotameters are the most commonly used in the industry. Glass materials are usually used for corrosive media with small diameters. Due to the fragility of glass materials, the key control points are also rotameters made of precious metals such as titanium.

Rotameter is a variable area flow meter based on float position measurement. It adopts an all-metal structure and Modular concept design, which has small pressure loss, a large turndown ratio (10:1), easy installation and maintenance, and can be widely used in complex and harsh In flow measurement and process control of environmental and various media conditions.

Rotameters are the most commonly used flowmeters in industry and laboratories. It has the characteristics of a simple structure, intuitive, small pressure loss, convenient maintenance and so on. The rotor flowmeter is suitable for measuring small flow through the pipe diameter D<150mm, and can also measure the flow of corrosive media. When in use, the flowmeter is generally installed on the vertical pipe section, and the fluid medium passes through the rotor flowmeter from bottom to top. The specially designed rotor flowmeter can be installed horizontally or vertically.

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