Instrument selection for water flow measurement

Abstract: The information on the selection of instruments for water flow measurement is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Changzhou Chengfeng Flow Meter Co., Ltd., 30 years of brand, 30 years of professionalism, professional selection, professional quotation, summarizes the experience of production practice in the past 30 years, and strives to develop various flow measurement products. According to the needs of different customers, different clients. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the article on the selection of meters for water flow measurement. Shichengfeng flow meter, 30 years of brand, 30 years of professionalism, professional selection, professional quotation, summarizes the experience of production practice in the past 30 years, and strives to develop various flow measurement products, according to the needs of different customers, different customers According to the requirements of the equipment, we professionally customize all kinds of non-standard flowmeter products for customers in full accordance with the parameters and requirements provided by customers.“Tailored”,persist in“Quality*, User*”The factory management policy ensures long-term stability and continuous improvement of product quality, and provides users with high-quality products and perfect services. The measurement of water flow is not difficult. Most of the flowmeters with different principles can be used to measure the flow of water, but it is not guaranteed to be used well by just installing one. The following is a brief analysis of the advantages and disadvantages of the flow meters used to measure various water quality flows. 1. Measurement objects with high sediment content. The water flow measurement object with high sediment content is often found in raw water. If a throttle differential pressure flowmeter or an equal velocity pipe differential pressure flowmeter is used, the pressure taking valve and the blowdown valve are often blocked by sediment, which affects the use. In contrast, this is not the case with insertion vortex flowmeters and insertion electromagnetic flowmeters. Large-diameter water flow meters tend to have a low flow rate, and sediment in the water is easy to deposit on the inner wall of the measuring tube, which reduces the flow cross-sectional area, resulting in a high flow indication value, so it should be cleaned regularly. 2. Measurement objects for process monitoring and control. The water flow meters used for process monitoring and control generally do not require as high measurement accuracy as those used for trade settlement. The main considerations are reliability, price, and types of output signals. In the old devices of industrial and mining enterprises, the most used is still the throttle type differential pressure flowmeter. In new installations, people prefer to use vortex flowmeters because the installation of throttling differential pressure flowmeters is complicated, the maintenance workload is large, and the pressure loss is large. Installation and maintenance are very simple, so the throttling differential pressure flowmeter is likely to be squeezed out of the market in water flow measurement. However, the vortex flowmeter can only solve some water flow measurement problems, because the vortex flowmeter with a larger diameter is more expensive than the electromagnetic flowmeter of the same diameter, and the vortex flowmeter with the largest diameter can only achieve DN300~DN400. The smallest diameter vortex flowmeter is now DN15, and its minimum measurable water flow is 0.32/m3h, while the diameter of the electromagnetic flowmeter is from DN2.5 to DN3000, and the measurable flow is from 0.0053 to 305000m3/h, so the coverage range is Much wider than a vortex flowmeter. In terms of the minimum flow velocity that can be measured, the vortex street can only reach about 0.4m/s, while the electromagnetic flowmeter can measure normally at 0.1m/s. The price of large-diameter electromagnetic flowmeters is also very expensive. The saving plan is to use plug-in flowmeters. Among them, there are commonly used uniform velocity tubes, plug-in vortex flowmeters and plug-in electromagnetic flowmeters. The plug-in vortex flowmeter can measure The lower limit of the flow rate is 0.32m/s, while the lower limit of the flow rate that can be measured by the electromagnetic flow probe is unlimited, but the error is slightly larger, about (±0.2%R+1mm/s) 3. The measurement object in the state of gas-liquid equilibrium. For water in a state of gas-liquid equilibrium, such as the water at the outlet of a boiler deaerator tank, to measure its flow, the flowmeter should be installed after the booster pump. There is a certain pressure loss, and the water in the gas-liquid equilibrium state will cause part of the liquid to vaporize due to the pressure reduction, causing the flowmeter to show a high value. 4. Measurement of sewage flow. The characteristics of sewage are dirty, and some are also corrosive to a certain extent. The sewage transported by pipeline can be measured by electromagnetic flowmeter, and the sewage discharged through open channel is suitable for measurement by open channel flowmeter. 5. Flow measurement of deionized water. Deionized water and high-purity distilled water are water of extremely high purity, and their electrical conductivity is about 3 orders of magnitude smaller than the electrical conductivity that can be measured by general-purpose electromagnetic flowmeters, so they cannot be measured by electromagnetic flowmeters. The instrument intelligent electromagnetic flowmeter is developed based on the standardized manufacturing system. Its advanced design concept ensures the high precision and high reliability of the product. Compared with the old electromagnetic flowmeter, it has high measurement accuracy and strong reliability. It has the advantages of good stability, complete functions and long service life. Breaking the routine, meeting more customer requirements, and tailoring various types of non-standard flowmeters for customers is a kind of ability and an attitude. Let customers buy satisfactory products and let customers get perfect service. This is our attitude. Flowmeter, a good product you can trust. Chinese domestic brand flowmeter. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Instrument selection for water flow measurement'

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