What are the common faults of portable steam flowmeter | orifice flowmeter

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1. Ultrasonic flowmeter selection (original imported portable ultrasonic flowmeter)

Today, the editor will share with you the knowledge of ultrasonic flowmeter selection, including analysis and answers to the original imported portable ultrasonic flowmeter. If it can solve the problems you want to know, follow our website. What technical parameters are required for the selection of ultrasonic flow meters? 1. Fluid type: Different flow meters should be selected for clear and mixed liquids, clean gases, and mixed gases. 2. Flow range: The fluid flow range should be moderate and not exceed the range of the flowmeter. 3. Pipeline size: For smaller pipeline sizes, rotors, turbines, and mass flow meters are generally used, while for larger pipeline diameters, ultrasonic flow meters and ultrasonic flow meters are generally used. Some materials of pipelines are not suitable for electromagnetic and ultrasonic applications. How to choose an intelligent flowmeter? Electromagnetic flowmeter is a flowmeter that measures flow based on Faradays law of electromagnetic induction. The advantages of electromagnetic flowmeter are minimal pressure loss and a wide range of measurable flow rates. The ratio of high flow rate to low flow rate is generally above 20:1, suitable for a wide range of industrial pipe diameters, up to 3m. The output signal is linear with the measured flow rate, with high accuracy. It can measure the fluid flow rate of acid, alkali, salt solutions, water, sewage, corrosive liquids, as well as mud, slurry, pulp, etc. with conductivity ≥ 5 μ s/cm. But it cannot measure the flow of gas, steam, and purified water. When a conductor cuts magnetic field lines in a magnetic field, an induced potential is generated in

the conductor, and the magnitude of the induced potential is proportional to the effective length of the conductor in the magnetic field and the speed at which the conductor moves perpendicular to the direction of the magnetic field. Similarly, when a conductive fluid flows vertically in a magnetic field and cuts magnetic induction lines, it will also generate induced potentials on the electrodes on both sides of the pipeline. The direction of the induced potential is determined by the right-hand rule, and the magnitude of the induced potential is determined by the following equation: Ex=BDv -- -- -- -- -- -- -- --. In the formula, Ex represents the induced potential, V; B represents the magnetic induction intensity, TD represents the inner diameter of the pipeline, mv represents the average flow velocity of the liquid, m/s。 However, the volumetric flow rate qv is equal to the product of the fluid velocity v and the pipeline cross-sectional area/4. Substituting the equation into this equation yields Qv=* Ex - - - - - - - equation. As can be seen from the above equation, when the diameter D of the pipeline is fixed and the magnetic induction intensity B remains constant, the measured volume flow rate is linearly related to the induced potential. If an electrode is inserted on each side of the pipeline, an induced potential Ex can be introduced, and the magnitude of this potential can be measured to obtain the volumetric flow rate. According to Faradays principle of electromagnetic induction, a pair of detection electrodes are installed on the tube wall perpendicular to the axis of the measuring tube and the magnetic field lines. When the conductive liquid moves along the axis of the measuring tube, it cuts the magnetic f

What are the common faults of portable steam flowmeter | orifice flowmeter

1. Ultrasonic flowmeter selection (original imported portable ultrasonic flowmeter)

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