How to choose the caliber of electromagnetic flowmeter

2024-06-27

  In the Electromagnetic Flowmeter selection, the choice of caliber is the first to be asked more questions, in the choice of Electromagnetic Flowmeter caliber should be how to consider it? Then it is very important to understand the Electromagnetic Flowmeter caliber size selection and which parameters are related.

  1, we must first realize that the Electromagnetic Flowmeter caliber selection and pipe diameter is not necessarily the same, but also has a closely related to the size of the flow. Therefore, the flow rate, full degree of flow, range and pipe caliber, but still depends on the flow first.

  2, the process of industrial transportation of water and other viscosity of the liquid, the pipeline flow rate is generally the economic flow rate of 1.5~3 m/s. Electromagnetic Flowmeter used in such a pipeline, the sensor caliber and pipe diameter can be the same. Electromagnetic Flowmeter full degree of flow when the liquid flow rate can be selected in the range of 1~10m/s, the range is relatively wide. The upper limit of the flow rate in principle is unrestricted, however, it is usually recommended that no more than 5m/s, unless the lining material can withstand the liquid flow scouring, the actual application of few more than 7m/s, more than 10m/s is more rare.

  3, full degree of flow rate of the lower limit of the flow rate is generally 1m/s, some models of Electromagnetic Flowmeter is 0.5m/s. Some of the new construction projects running at the beginning of the flow rate of low or low flow rate of the pipe system, from the point of view of the measurement accuracy, the Electromagnetic Flowmeter caliber should be changed to less than the diameter of the pipe to the connection of the pipe reducer. Used for easy adhesion, deposition, scaling and other substances in the fluid, the selection of the flow rate is not less than 2m/s, increased to 3 ~4m/s or more, to play the role of self-cleaning, to prevent adhesion and deposition. Used for slurry and other abrasive fluids, the commonly used flow rate should be less than 2~3m/s, in order to reduce the wear and tear on the lining and electrodes. In the measurement of low conductivity liquid close to the threshold, as far as possible to select a lower flow rate (less than 0.5~1m/s), because the flow rate to increase the flow noise will increase, and the output wobble phenomenon.

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