Model Description of Vortex Flow Meter

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1. Flow range of vortex flowmeter

The flow range of vortex flowmeter is mainly determined by the sensor diameter and fluid properties. The larger the diameter, the wider the measurable flow range. The conventional liquid measurement range is between 0.5m/s and 7m/s flow rate, and the gas measurement range is between 5m/s and 60m/s. 1. Correspondence between caliber and flow rate (under normal temperature water conditions) The flow range is directly related to the instrument caliber, and the following are typical parameters (referring to the product manuals of mainstream domestic manufacturers such as Chuanyi and Ganges in 2023): • DN15: minimum about 1.2 m ³/h, maximum about 15 m ³/h • DN25: minimum about 3 m ³/h, maximum about 40 m ³/h • DN50: minimum about 10 m ³/h, maximum about 150 m ³/h • DN100: minimum about 40 m ³/h, maximum about 650 m ³/h • DN200: minimum about 150 m ³/h, maximum about 2500 m ³/h • DN300: minimum about 300 m ³/h, maximum about 5500 m ³/h. 2. Influence of fluid medium • Liquid measurement (Water, oil, etc.): The flow rate range is usually 0.5-7 m/s, and liquids with viscosity higher than 30cP will significantly increase the measurement lower limit. Gas measurement (air search, steam, etc.): The flow rate range is usually 5-60 m/s, and low-pressure gases may have an increased lower limit flow rate due to low density. • Steam measurement: It is necessary to distinguish between saturated steam and superheated steam, and the flow range should be calculated based on temperature and pressure compensation to determine the actual mass flow rate. Avoid long-term use below the lower limit of 20%, otherwise the signal stability will deteriorate and errors will increase. • The maximum flow rate sh

4. The extended range ratio of the standard vortex flowmeter is 1:10~1:15, and models using dual sensors or digital signal processing technology can be extended to 1:20~1:30 (such as Emerson high-precision models), but the price is higher. The actual selection should be strictly based on the calculation of medium operating parameters (temperature, pressure, density, viscosity). It is recommended to directly use the selection software provided by the manufacturer or check the latest version of the product manual to obtain accurate data.

2. What are the corresponding sizes of various specifications of vortex flowmeters? The size specifications of vortex flowmeters may vary depending on different manufacturers and models. Generally speaking, nominal diameters ranging from DN15 to DN600 or even larger are covered. For vortex flowmeters with smaller diameters such as DN15-DN50, the overall length is relatively short, usually around 150-300mm, and the height and width are also relatively small. Li Huai is suitable for smaller pipeline installation spaces, and its flange size meets the corresponding national standards, making it easy to connect with pipelines. The length of the circular DN80-DN200 vortex flowmeter is approximately in the range of 300-600mm. As the diameter increases, the length, height, and width will also increase accordingly to ensure measurement stability and accuracy. The flange size is also increased according to the standard to match larger diameter pipelines. When the nominal diameter reaches DN250-DN600 and above, the size further increases, and the length may be around 600-1500mm. The o

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