Introduction: Although we have also talked about some selection methods of intelligent electromagnetic flowmeters before, this article mainly discusses some small details that need to be paid attention to during the selection process of intelligent electromagnetic flowmeters ;

1. Determination of the accuracy level of the intelligent electromagnetic flowmeter

The accuracy of the intelligent electromagnetic flowmeter produced by our factory is divided into three levels: ±0.3%, ±0.2%, ±0.5% . For the production of alumina or other flow control, the accuracy of the selection is generally not too high. Accuracy is a bit uneconomical for the economy, so you can choose the general accuracy;

2 , caliber, flow rate and flow range determination

The intelligent electromagnetic flowmeter has the advantage of wide measuring range. If the flow rate of the alumina slurry is measured, the general flow rate is 1.5~3m/s , and the sensor aperture of the intelligent electromagnetic flowmeter is generally consistent with the diameter of the pipe. For the selection of abrasive fluids, the commonly used flow rate is generally 2~3m/s , in order to reduce the wear of the electrode lining;

3 , the choice of intelligent electromagnetic flowmeter lining

For some corrosive fluids, fluoroplastic lining should be used when lining is selected. The so-called fluoroplastic lining is the PTFE which we often use. It is characterized by excellent corrosion resistance and temperature resistance up to -40 °C~ +180 ° C , but the disadvantage is that it is not wear-resistant, but ceramic lining can be used for the abrasive medium. Ceramic lining also has the advantages of corrosion resistance, high temperature resistance and wear resistance, but it also has the disadvantage that it cannot adapt to the drastic changes of temperature. Therefore, the crushing phenomenon will occur; therefore, improper selection of the lining of the electromagnetic flowmeter is likely to cause lining deformation in actual work, affecting the normal operation of the flowmeter;

4 , the choice of electrode materials

In the selection of the electrode material of the intelligent electromagnetic flowmeter, the first thing to consider is the corrosiveness of the electrode to the measuring medium, and the second is to determine whether the chemical reaction on the surface of the electrode will occur. If improperly selected, electrode passivation, oxidation, etc. will occur. Chemical reaction, some electrode materials commonly used can refer to the following table

Summary: For the selection of intelligent electromagnetic flowmeter, the choice of this small detail is very important for the later use of electromagnetic flowmeter. One is improperly selected, the lighter has a large measurement error, and the heavy one does not work directly, so the user is in electromagnetic Pay attention to the selection of flow meters

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Water-assisted injection molding: Water-assisted injection molding technology is an advanced injection molding process in which part of the melt is injected into the mold cavity and high-pressure water is injected into the melt through the equipment to finally shape the workpiece.

Due to the incompressibility of water, the water front creates a solid interface, squeezing the inner wall of the product into a cavity, and the water front also acts as a rapid cooling. Therefore, the water supplement has many advantages over the gas supplement. Research and application show that the water supplement can produce thinner and more uniform cavity wall, and the inner surface of the flow channel is very smooth. Especially for thick wall workpiece, the cooling time can be greatly reduced compared with gas auxiliary.

High gloss injection molding: Highlights the basic process of injection molding is prior to injection molding, through the use of high temperature and high pressure steam will mould surface rapidly warming, the forming die cavity surface temperature of resin plastic glass transition temperature (Tg) above, then the plasticizing good plastic melt into the closed mold cavity, the injection stage, mold temperature by high temperature and high pressure steam remains the same, When the injection is finished, the air supply is stopped, and the water vapor in the pipe is blown clean by air pressure of the air pipe. After that, the cooling water is injected to make the mold temperature drop rapidly until the mold is cooled and the product is removed by opening the mold

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