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Electromagnetic flowmeters feature stable performance and are widely used; they can be found in areas with hygiene requirements such as the pharmaceutical industry, food industry, and bioengineering. However, during the feedback process from users regarding actual on-site applications, technicians found that certain factors present in real-world operating conditions affect the measurement results, preventing them from meeting the users’ expectations. Next, the technical expert from Jiangsu Evergrande Instrument Flow Meters will provide a detailed analysis and discussion on solutions to the issue of electromagnetic flow meters not being able to handle negative pressures. Advantages of electromagnetic flowmeters for measuring chilled water: such as no pressure loss, high accuracy, and good stability. However, due to the properties of chilled water, certain issues must be taken into account when using electromagnetic flowmeters. First is the Uchimura issue with electromagnetic flowmeters; pay attention to the problem of the memory being subjected to negative pressure. When the medium being measured is somewhat corrosive, we need to use polytetrafluoroethylene storage materials. However, electromagnetic flowmeters made of PTFE material cannot withstand negative pressure. There are two ways to address the problems associated with electromagnetic flowmeters: 1. Replace the original vent valve with a check valve; when a slight negative pressure appears in the pipeline, the check valve opens automatically to draw in air from the atmosphere, thereby ensuring safety. 2. A memory with a frame structure is used, but the downside is that it increases investment costs. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content! http://www.yb1518.com/UploadFiles/2012717174126829.jpg