Intelligent electromagnetic flow meter product selection and use method

Abstract: Intelligent electromagnetic flow meter product selection and usage information are provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. Product selection of intelligent electromagnetic flowmeter Selection of caliber and range The caliber of the transmitter is usually the same as that of the piping system. If the channel dividing system is to be designed, the caliber can be selected according to the range of the flow mother and the flow rate. For electromagnetic flowmeters, the flow rate is . More flowmeter manufacturers select models and price quotations. You are welcome to inquire. The following is the product selection and usage method of intelligent electromagnetic flowmeters. Intelligent electromagnetic flowmeter product selection caliber and range selection The transmitter caliber usually chooses the same caliber as the pipeline system. If the channel dividing system is to be designed, the caliber can be selected according to the range of the flow mother and the flow rate. For electromagnetic flowmeters, the flow velocity is more suitable at 2-4m/s. In special cases. If there are solid particles in the liquid, considering the wear situation, the usual flow rate can be selected≤3m/s, for the fluid that is easy to attach to the pipe wall, the flow rate can be selected≤2m/s, after the flow rate is determined, the diameter of the transmitter can be determined according to. The range of the transmitter can be selected according to two principles: one is that the full range of the meter is greater than the expected maximum flow value, and the other is that the normal flow address is greater than 50% of the full range of the meter to ensure a certain measurement accuracy. Lining selection The correct selection method of lining material for electromagnetic flowmeter should be selected according to the corrosiveness, wearability and temperature of the measured medium: 1. Natural rubber (soft rubber) 1. Good elasticity, wear resistance and tensile strength Breaking force 2. Corrosion resistance to general weak acid and weak alkali 3. Water and sewage measurement 1. Excellent elasticity, high breaking force, good wear resistance 2. General low concentration resistance Corrosion of acid-base and salt solutions, but not resistant to corrosion of oxidizing media<80 ℃; water, sewage, mud and pulp 4. Polyurethane rubber (Polyurethane) 1. Excellent wear resistance 2. Poor acid and alkali resistance<40 ℃ test neutral strong abrasion coal slurry, mud and ore slurry 5. Polytetrafluoroethylene (PTFE) 1. Boiling-resistant hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali and various organic solvents 2. Good wear resistance , poor bonding performance -80 ~ +180 ℃; measuring concentration, strong alkali strong corrosive solution and hygienic medium application field selection 1. Understand the process parameters (1) Know the name of the liquid to be tested (provided by the user) (2) Know the maximum flow, common flow and minimum flow of the liquid to be measured (provided by the user) (3) Know the process pipe diameter (provided by the user) (4) Know the medium temperature (provided by the user) (5) Know the medium pressure (provided by the user) Provided) (6) Know the conductivity of the measured fluid (provided by the user) (7) Know whether there is negative pressure (provided by the user) 2. Preliminary selection (1) According to the name and properties of the measured medium, determine whether to use an electromagnetic flowmeter (determined by the salesman). Note: The electromagnetic flowmeter can only measure the flow of conductive liquids, while gas, oil and other Most organic liquids are not examples of general conductive liquids (2) According to the properties of the medium to be learned, determine the electrode material. The company generally provides four kinds of electrodes, such as stainless steel, Hastelloy, titanium and tantalum. Which electrode should be selected should be checked according to the properties of the medium. Relevant information manual (2) Determine whether to use rubber or tetrafluoro lining according to the learned medium temperature (determined by the salesman) Note: The temperature resistance of rubber should not exceed 80C; the temperature resistance of PTFE is 150C, and it can withstand 180C in an instant; Adopt rubber lining and stainless steel electrode (3) According to the medium pressure, choose the flange specification of the meter body (determined by the salesman). Note: The electromagnetic flange specification is usually the rated pressure of the flange when the diameter is DN10-250.≤1.6Mpa; when the diameter is from DN250-1000, the flange rated pressure≤1.0Mpa; when the actual pressure of the medium is higher than the corresponding range of the above pipe diameter-pressure, it is a special order, but the maximum pressure should not exceed 6.4Mpa (4) Determine the conductivity of the medium Note: (1) The conductivity of the electromagnetic flowmeter must not be low At 5uS/cm (2) the conductivity of tap water is about tens to hundreds of uS/cm, general boiler soft water (deionized water) is conductive, pure water (highly distilled water) is not conductive (3) gas, oil and absolute The conductivity of most organic liquids is much lower than 5uS/cm and is not conductive. 3. Understand the user requirements (1) Know whether it is a combined local display or a split remote display (provided by the user) Note: When it is a split remote display, please know the maximum distance, and the maximum separation distance is 100 meters (2) Know whether Other additional functions are required (provided by the user) Note: 1. The electromagnetic flowmeter itself has upper and lower limit flow alarm, frequency and current output functions, and no special order is required. When the submersible IP68 is selected, it is a special order. 3. When the electromagnetic flowmeter is to be connected with a computer, the RS-485 communication port needs to be added, which is a special order. Model selection: After passing the above steps, the model and specification of the electromagnetic flowmeter can be finally determined. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Intelligent electromagnetic flow meter product selection and use method'
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