Selection, use and management of large-diameter water meters

Abstract: The selection, use and management information of large-diameter water meters are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. Prominent problems in the use and management of large-diameter water meters Large-diameter water meters are mainly installed and used in government agencies, enterprises (institutions), domestic water use in residential quarters, urban fire-fighting water and industrial production water units or areas. many. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the details of the selection, use and management of large-diameter water meters. 1. Prominent problems in the use and management of large-diameter water meters Large-diameter water meters are mainly installed and used in government agencies, enterprises (institutions), domestic water use in residential quarters, urban fire-fighting water and industrial production water units or areas. The characteristics of large number of lines, long lines, and wide areas bring many problems to the daily use and management of water supply enterprises. 1. It is difficult to monitor and manage. The installation sites of water meters are extremely scattered, the timeliness of monitoring and management is poor, and the cost of reading and measuring is high, which directly affects the economic benefits of water supply enterprises. 2. The cost of replacing the meter is high. The service life of the metering water meter (DN200 horizontal screw water meter) used by our company for many years has exceeded the longest service life of this type of water meter, and the length of the early water meter of this type is L=300mm, and the measurement grade is A , is already an obsolete product. The extended use of this type of products and the performance limitations of the equipment itself have led to a high failure rate of our company's DN200 water meters (in 2005, the failure rate of DN200 water meters was as high as 52.27%). Financial resources have brought great cost pressure to the operation of water supply enterprises. Once the large-diameter water meter fails, the water consumption needs to be estimated, which will undoubtedly cause economic losses to the water supply enterprises. 3. The accuracy of water measurement is poor. As of 2009, the number of large-diameter water meters in use by our company was 7,021, accounting for 1.65% of the total 421,256 water meters in that year, while the water sales accounted for 51.55% of the total water sales. Due to the low initial flow, narrow flow range and easy failure of the old large-diameter water meter, the water meter measurement is inaccurate, which seriously affects the production and sales gap. 2. Scientific selection to ensure high-quality and reliable water meter measurement performance On the basis of careful analysis and study of the outstanding problems existing in the use and management of large-diameter water meters, and the actual situation of urban construction management and water supply operation, our company is in the selection of large-diameter water meters. At the same time, taking into account the measurement cost and the economic interests of the enterprise, adhere to the principles of science, economy, convenience, etc., and scientifically select the appropriate water meter. 1. Selection and use of DN200 water meters As early as 2005, our company analyzed the actual water consumption of users of DN200 water meters, found the cause of the failure, and decided to choose three new types of water meters with high cost performance.——COSMOSWPD, SCL-61D (all-in-one machine), MAG8000 electromagnetic water meter replace the old DN200 water meter. Through comparison and model selection, our company replaced the old meter and configured the new DN200 water meter, the failure rate of the year dropped from 52.7% to 22.73%, tracked and managed the water consumption in the past 5 years and the record of changing the meter year by year, the failure rate of the DN200 in 2010 The rate was 4.88%. From the trial use of the ultrasonic water meter SCL-61D and Siemens MAG8000 electromagnetic water meter to the official batch use in 2006, the two water meters have been verified by time with accurate measurement and stable performance, which has brought good economic benefits to the enterprise. Trial 3 new DN200 water meters and get the following experience (see Table 1 for performance comparison): Table 1 Comparison of measurement performance of 3 new water meters (1) COSMOSWPD water meter is low in price and has a verification period of two years. It is suitable for measuring clean water. If you repair it yourself , the verification personnel must be trained. (2) The price of SCL-61 series ultrasonic water meters is moderate, and there are various models of single-channel and multi-channel to choose from. If there is a systematic error in the measurement of the water meter, it can be adjusted, and the supplier is responsible for fault maintenance. The verification period is 3 years. Suitable for fresh and raw water metering. The installed pipe network should be measured by zone. If the installation location is limited, the ultrasonic insertion flowmeter can be considered. The advantages are that the probe is not easy to scale, the maintenance cost is low, and it is convenient for subsequent management and maintenance. (3) MAG8000 Siemens water meter is expensive, but 6 years after the first verification and put into use, the performance is stable and reliable, the measurement is accurate, and it is suitable for the measurement of clean water and raw water. 2. Selection and use of DN80~DN150 water meters The fully liquid-sealed WS vertical screw-wing water meters have been produced with the introduction of technology in recent years. The flow range is quite wide and is suitable for occasions with large flow changes. Its advantages are: installation without straight pipe section requirements, no need to install filters, horizontal installation, so it is recognized and widely used by the water supply industry. The manufacturer also conducts a return visit to the user, and the quality problems that appear in the use of the water meter can be timely fed back, and the product quality can be continuously improved and improved. Therefore, our company started trial use in 2003 and officially selected DN80~DN150 fully liquid-sealed WS vertical screw-foil water meters until now, and the failure rate has been decreasing year by year (see Table 2). Table 2 Statistics of failure rate of large-diameter water meters from 2005 to 2010

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