How to buy electromagnetic flow meters in various industries?

Abstract: How to buy electromagnetic flow meters in various industries? The information is provided to you by the excellent manufacturers of flowmeters and flowmeters. There are three main applications of electromagnetic flowmeters in various industries: *. Large-caliber meters are mostly used in water supply and drainage projects; Liquid and black liquor, non-ferrous metallurgy. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is how to buy electromagnetic flowmeters in various industries? Article details. There are three main applications of electromagnetic flowmeters in various industries: *, large-diameter meters are mostly used in water supply and drainage projects; second, medium and small diameters are often used in hard-to-measure fluids or high-demand places for solid-liquid dual phase; such as measuring pulp in the paper industry Liquid and black liquor, ore slurry in non-ferrous metallurgy industry, coal slurry in coal preparation plant, strong corrosive liquid in chemical industry, cooling water control and leakage monitoring of blast furnace tuyere in iron and steel industry, flow measurement and control of long-distance pipeline coal hydraulic transportation. Third, small caliber, small caliber; often used in the pharmaceutical industry, food industry, biological engineering and other places with hygiene requirements. Various industries should choose electromagnetic flowmeters according to their uses: 1. Explosion-proof type: It can be used in explosive atmosphere environment conditions, such as chemical industry and coal mine use. 2. Ordinary type: used for medical treatment, food measurement, etc. 3. Hygienic type: It is easy to disassemble, rinse and sterilize, and can be installed quickly. It is suitable for use in the medical department. 4. Submersible type: open channel flow measurement, replacing the traditional weir flowmeter. 5. High pressure type: flow measurement and control of cement slurry in petrochemical industry and high pressure water injection in oil production process. When purchasing an electromagnetic flowmeter, choose it according to your own needs when choosing the caliber. The diameter of the selected instrument is not necessarily the same as the diameter of the pipe, and it should be determined according to the flow rate. The process industry transports liquids with different viscosities such as water, and the pipeline flow rate is generally the economical flow rate 1·5~3m/s. The flowmeter is used in such a pipeline, and the sensor diameter is the same as the pipe diameter. When the electromagnetic flowmeter is full-scale flow rate, the liquid flow rate can be selected in the range of 1~10m/s. The upper flow velocity is not limited in principle, however, it is generally recommended not to exceed 5m/s, unless the lining material can withstand the flow of fluid, practical application rarely exceeds 7m/s, and more rarely exceeds 10m/s. The lower limit of the flow velocity of the full-scale flow rate is generally 1m/s, and some models of instruments are 0·5m/s. In some projects, the flow rate is low or the flow rate is low in the pipeline system. From the perspective of measurement accuracy, the diameter of the instrument should be changed to be smaller than the diameter of the pipe, and connected with a reducer. For fluids that are prone to adhesion, deposition, scaling, etc., the flow rate should not be lower than 2m/s, and it is better to increase it to 3~4m/s or above, which can play the role of self-cleaning and prevent adhesion and deposition. It is used for highly abrasive fluids such as pulp, and the usual flow rate should be lower than 2~3m/s to reduce the wear of lining and electrodes. When measuring low-conductivity liquids close to the threshold, choose a lower flow rate (less than 0·5~1m/s), the flow noise will increase due to the increase of the flow velocity, and the output sloshing phenomenon will appear. The range of electromagnetic flowmeter is relatively large, usually not less than 20, and the instrument with automatic range switching function can exceed 50~100. Note: The premise of using electromagnetic flowmeter is that the liquid to be measured must be conductive and cannot be lower than the threshold. If the conductivity is lower than the threshold, it will cause measurement error until it cannot be used. If it exceeds the threshold, it can be measured even if it changes, and the indication error does not change much. It also depends on the length of the flow signal line between the sensor and the converter and its distributed capacitance. The manufacturer's instruction manual usually specifies the length of the signal line corresponding to the conductivity. Meters with non-contact capacitively coupled large-area electrodes can measure conductivity as low as 5×10-8S/cm liquid. There is no problem in the use of industrial water and its aqueous solutions, acids, alkalis, salt solutions, etc. Petroleum products and organic solvents are too low in conductivity to be used. From the data, it is found that some pure liquids or aqueous solutions have low conductivity and are considered unusable. However, in actual work, there will be instances where they can be used due to impurities. For the aqueous solution, the conductivity in the data is measured in the laboratory with pure water. The actual aqueous solution may be proportioned with industrial water, and the conductivity will be higher than the one obtained, which is also beneficial for flow measurement. The actual liquid conductivity is preferably at least an order of magnitude larger than the threshold specified by the meter manufacturer. The above is the entire content of this article. You are welcome to inquire about the flowmeter selection and quotation of our manufacturer. 'How to buy electromagnetic flow meters in various industries? 》
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