Measurement data is related to the production and operation of enterprises and the quality control of products. For the water supply industry, measurement is particularly important. It is not only related to the economic benefits of water companies, but also affects the interests of millions of households.Due to various influences such as the diameter and length of the pipeline and the requirements for measurement accuracy, water companies will have different choices for flow meters. So what issues should be paid attention to in the selection of tap water flow meters?

Problems that should be paid attention to in the selection of flow meters used in the tap water industry

The key to using a good flow meter lies in the selection. At present, there are more than 100 manufacturers of large-caliber flow meters in my country, and the models are also diverse. Therefore, the following points should be paid attention to when selecting the flow rate juice: it must have a verification certificate issued by the national department, the on-site installation conditions meet the specific requirements of the selected flowmeter for the straight pipe section, and the selected flowmeter adapts to the installation conditions. The following are the standards that the tap water industry can refer to when selecting flow meters:

1.Selection according to the diameter of the water pipe

The tap water industry usually prioritizes electromagnetic flow meters when choosing flow meters, while water diversion projects and reservoirs will choose venturi tubes (durable and less maintenance); ultra-large diameters can choose ultrasonic flow meters, try not to use plug-in Flow meter.

2.Selection according to the straight pipe section and the water quality to be tested

In general, the electromagnetic flow meter requires the front pipe section to be at least 5DN, and the front straight pipe section of the ultrasonic flow meter is 10DN or 20DN.

3.Selection according to the environmental conditions on site

The selected flow meter must be able to adapt to the actual environmental conditions on site, such as temperature, humidity, electromagnetic signal interference, etc.

4.Selection according to the specific requirements of the control system

Under normal circumstances, the tap water industry requires flow meters to have the functions of display and flow signal output. At present, with the widespread application of network technology and computer technology, the control system now uses a large number of data communication technologies, which is more reasonable. Different communication technologies are equipped with different flow meter protocols, such as PROFIBUS, HART, MOBUS, etc. This requires that the tap water industry needs to consider the specific requirements of the control system when selecting the flowmeter to select the appropriate model.