Electromagnetic flowmeter model is based on the site conditions for selection of a string of codes, because each factory selection sample book is not consistent, so the model also has a variety of different, then how to select electromagnetic flowmeter, electromagnetic flowmeter selection methods are as follows:
- 1. Flow rate, full flow rate, range and calibre: the calibre of the selected electromagnetic flowmeter is not necessarily the same as the pipe diameter, depending on the flow rate.
- 2. Process industry conveying water and other viscosity of the liquid, the pipeline flow rate is generally the economic flow rate of 1.5 ~ 3m / s. Electromagnetic flowmeter used in such a pipeline, the sensor calibre and the same diameter of the pipe can be. Electromagnetic flowmeter full-scale flow rate of liquid flow rate can be selected in the range of 1 to 10m / s, the range is relatively wide. The upper limit of the flow rate in principle is unrestricted, however, it is usually recommended not to exceed 5m/s, unless the lining material can withstand the liquid flow scouring, the actual application rarely exceeds 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 in the pipe system, from the point of view of the measurement accuracy, the electromagnetic flowmeter calibre should be changed to less than the diameter of the pipe to connect the pipe with a 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.
- 4. Domestic can provide the stereotypes of the product calibre from 10mm to 3000mm, with the actual application of small calibre or the majority, but with most of the other principles of flow meters (such as volumetric flowmeter, turbine flowmeter, vortex flowmeter or Coriolis mass flowmeter, etc.), compared with the large calibre instrument occupies a larger proportion. Nearly 10,000 units of an enterprise, 50mm below the small diameter, 65 ~ 250mm in the calibre, 300 ~ 900mm large calibre, more than 1,000mm oversized calibre accounted for 37%, 45%, 15% and 3%, respectively.
The above is electromagnetic flowmeter manufacturers share "electromagnetic flowmeter how to select, do not choose the wrong". Thank you for watching. If you have any questions, you can consult online or leave us a message. We will wholeheartedly answer for you.
