Selection points of flow meter in water industry

Abstract: The key points of flow meter selection in the water industry are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. The measurement of water flow in and out of water diversion projects, waterworks, and sewage treatment plants is a key measurement in the water industry. It is an important basis for companies to count production, production costs, pipe network leakage, and unit energy consumption and other major production and operation indicators. essential. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the details of the article on the selection of flowmeters in the water industry. The measurement of water flow in and out of water diversion projects, waterworks, and sewage treatment plants is a key measurement in the water industry. It is an important basis for companies to count production, production costs, pipe network leakage, and unit energy consumption and other major production and operation indicators. essential measurement. The selection of metering instruments for inflow and outflow and water flow is more critical. How to correctly select flow meters and improve the level of measurement and detection is an important task for enterprises. Compared with other fields, the flowmeters used in the flow measurement of import and export water flow in water diversion projects, water plants and sewage treatment plants have their own special requirements. First of all, the diameter of the flowmeter is relatively large, generally in the range of DN300mm-DN1000mm, and the maximum diameter of the electromagnetic flowmeter that has been successfully used in China reaches DN3000mm; Shanghai Kent Intelligent Instrument Co. Secondly, the flow measurement value of water is large, generally thousands to tens of thousands of m3/h; in addition, in order to meet the requirements of water supply and drainage trade measurement, the selected type of flow meter requires high accuracy; due to the diameter of the flow meter It is large and the installation position is limited, so the requirements for the straight pipe section cannot be too high. According to the characteristics of inlet and outlet water flow, we should pay attention to the following aspects when choosing a flow meter: 1. The larger the diameter of the process pipeline, the smaller the pressure loss of the flow meter, the better. Generally, the method of reducing the local diameter of the pipeline is not used to increase the flow rate; 2. For the newly designed and installed pipelines, generally choose an appropriate flow rate. Because the flow rate of the fluid is too low, the diameter of the flow meter is large, and the investment of the corresponding meter increases. If the flow rate of the fluid is too high, it will cause a large loss of power pressure and increase the operating cost, which is uneconomical. However, when selecting the type, it is necessary to leave a flow margin for future expansion; 3. Due to the low flow rate of the fluid, the fluid Dirt in the pipe, sludge and scale after a long period of operation are easily deposited on the inner wall of the pipe and on the electrode. In the engineering design, the cleaning of the contact part between the instrument and the fluid should be considered; if the electromagnetic flowmeter cannot be cleaned and the electromagnetic flowmeter is selected, the scraper electrode can be used; 4. The measurement range of the instrument is required to be large. The flow of some water is very different at night and day, winter and summer, up to several times. Therefore, the flowmeter of these waters requires a particularly large range; 5. The protection level of the instrument is required to be high. Most of the large-diameter pipelines are buried underground to save investment and space. In the north, it is also necessary to prevent freezing. Therefore, the split flow sensor is mostly installed in the instrument well. Due to reasons such as rainwater, well wall leakage and pipeline leakage, the water level in the well often rises and the flow sensor is submerged. Therefore, this situation should be estimated in the design, and a submersible flow sensor, such as IP68 protection level, should be selected. At the same time, the instrument well should be treated with waterproof engineering. 6. Due to the difficulty in disassembly, transportation and installation of large-caliber flow meters, and the process does not allow flow interruption and shutdown, it is hoped that the meter can be dry-calibrated online. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Key Points for Selection of Flow Meters in Water Industry'

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