Intelligent electromagnetic flowmeter liner selection method

Intelligent electromagnetic flowmeters are widely used in petroleum, chemical, metallurgy, textile, food, pharmaceutical, papermaking and other industries as well as environmental protection, municipal management, water conservancy construction and other fields. The fabric materials of electromagnetic flowmeters (or the measuring tubes that are in direct contact with the medium) mainly include rubber, polytetrafluoroethylene, ceramics, and F46. The sensor parts that are in contact with the fluid are made of fabrics (or insulating materials). Tubes), electrodes, grounding rings and sealing gaskets. The corrosion resistance, wear resistance and upper operating temperature limit of their materials affect the adaptability of the surface to fluids. Due to the few parts, simple shape and flexible material selection, the electromagnetic flowmeter sensor has strong adaptability to fluids.

Intelligent electromagnetic flowmeter polyurethane rubber has excellent wear resistance, but is acid and alkali resistant Less corrosive. Its wear resistance is equivalent to 10 times that of natural rubber, and it is suitable for coal slurry, ore slurry, etc.; the medium temperature should be lower than 40~60/70℃. The earliest application of fluoroplastics was polytetrafluoroethylene. Because it only relies on pressure and no adhesive force between it and the measuring tube, it cannot be used in negative pressure pipelines. Later, various modified types were developed to achieve injection molding and combine with the measuring tube. It has strong binding force and can be used for negative pressure, neoprene rubber and fiberglass. It can also be used for non-corrosive or weakly corrosive liquids, such as industrial water, waste sewage and weak acids and alkalis, with the lowest price. Intelligent electromagnetic flowmeter fluorine plastic has excellent chemical corrosion resistance, but poor wear resistance and cannot be used to measure ore slurry. Alumina ceramics have excellent wear resistance and resistance to strong acid and alkali wear and corrosion. The wear resistance is about 10 times that of polyurethane rubber. It is suitable for corrosive slurries; however, it is brittle and easily broken when the device is clamped. , can be used at higher temperatures (120~140/180℃) but must prevent sudden changes in temperature, such as steam sterilization. Usually, sudden temperature changes cannot exceed 100℃, and it takes 10 minutes to raise the temperature to 150℃.