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What aspects should be considered when purchasing vortex flowmeters?

2019-03-28 View Original

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  Vortex flowmeters are primarily used for measuring steam, and they are widely employed in the industrial sector due to their advantages such as a wide measurement range and high accuracy. They are also highly regarded by users because of their simple maintenance requirements, high reliability in measurements, and low susceptibility to influences from related parameters. Although they are all vortex flowmeters, there are still differences in terms of measurement range, accuracy class, gas density, etc.; therefore, attention should be paid when making a selection.   1. Flow range: The selection of the flow range for a turbine flow meter has a significant impact on its accuracy and service life. Moreover, each size of flow meter has a specific measurement range, and the choice of flow meter size is also determined by the flow range. The principle for selecting the flow range is that the minimum flow rate during use should not be lower than the minimum flow rate that the instrument can measure, and the maximum flow rate during use should not be higher than the maximum flow rate that the instrument can measure. For applications with intermittent operation where the actual operating time of the instrument per day is no more than 8 hours, 1.3 times the maximum flow rate during actual use is taken as the upper limit for the flow range; for applications with continuous operation where the actual operating time of the instrument per day is at least 8 hours, 1.4 times the maximum flow rate during actual use is taken as the upper limit for the flow range. The lower flow limit for the instrument is appropriately set at 0.8 times the minimum flow rate in actual use.   2. Accuracy level: Generally, vortex flowmeters are chosen due to their high accuracy. However, the higher the accuracy of a flowmeter, the more sensitive it is to changes in operating conditions on site. Therefore, careful consideration should be given to the choice of accuracy level, taking economic factors into account. For trade settlement instruments used in large-diameter gas pipelines, it is cost-effective to invest more in high-precision instruments; whereas for applications with lower flow rates, instruments of moderate precision are sufficient.   3. Gas density: For gas turbine flowmeters, the fluid property that has the greatest impact is the gas density; it affects the meter’s coefficient significantly, especially in low-flow regions. If the gas density changes frequently, corrective measures must be taken for the flow coefficient of the flow meter.   4. Pressure loss: Try to choose turbine flowmeters with low pressure loss. Since the pressure loss of the fluid as it passes through the turbine flow meter is smaller, less energy is required for the fluid to move from the inlet pipe to the outlet pipe; in other words, the total power needed is reduced. This allows for **energy savings, lower transportation costs, and improved efficiency**.   When selecting a vortex flow meter, pay attention to factors such as the flow range, accuracy class, gas density, and pressure loss mentioned above. This will help in choosing a flow meter that is suitable for the specific operating conditions and requirements, thereby avoiding unnecessary waste due to mismatched operating conditions. For more information, please visit the company’s official website at http://www.yb1518.com/. Please retain this link when reproducing the content! http://www.yb1518.com/UploadFiles/20175239314754.jpg

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