『Vortex flowmeter range in tons』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
1. Range of vortex flowmeter
The core conclusion of the range of vortex flowmeter is that the applicable range of different media (gas, liquid, steam) varies significantly, and the selection should strictly match the characteristics of the media to ensure the lower limit of flow rate and installation conditions.
1. Gas measurement parameters In gas applications, the range ratio of vortex flowmeter can reach 1:30, but it must meet the requirement of flow velocity ≥ 4m/s. If the flow rate is lower than this value, the signal wheel may be lost due to insufficient medium energy, affecting the continuity of measurement.
2. Liquid measurement parameters: The flow velocity of the liquid medium should be ≥ 0.5m/s. When the flow rate approaches the lower limit, it is necessary to focus on investigating the interference of bubbles or impurities in the pipeline to avoid uneven vortex generation that may cause data abnormalities.
Although the document on special requirements for steam measurement does not specify the specific values of the steam range, a steam dryness of ≥ 95% is a basic prerequisite.
. During installation, it is necessary to reserve a straight pipe section with the first 10 times the diameter and the last 5 times the diameter to reduce turbulence interference and ensure an accuracy error of ≤ 1.5%.Fourth, the core principle of selection is that the caliber selection should be based on the lower limit of the measured medium flow rate, rather than simply corresponding to the pipeline size.
. For example, in low-pressure gas scenarios, it is common for large pipe diameters to match small diameter flow meters, and the compatibility needs to be verified through a flow diamet
2. Flow range of vortex flowmeter
The flow range of vortex flowmeter is mainly determined by the sensor diameter and fluid properties. The larger the diameter, the wider the measurable flow range.
. The conventional liquid measurement range is between 0.5m/s and 7m/s flow rate, and the gas measurement range is between 5m/s and 60m/s. 1. Correspondence between caliber and flow rate (under normal temperature water conditions) The flow range is directly related to the instrument caliber, and the following are typical parameters (referring to the product manuals of mainstream domestic manufacturers such as Chuanyi and Ganges in 2023): • DN15: minimum about 1.2 m ³/h, maximum about 15 m ³/h • DN25: minimum about 3 m ³/h, maximum about 40 m ³/h • DN50: minimum about 10 m ³/h, maximum about 150 m ³/h • DN100: minimum about 40 m ³/h, maximum about 650 m ³/h • DN200: minimum about 150 m ³/h, maximum about 2500 m ³/h • DN300: minimum about 300 m ³/h, maximum about 5500 m ³/h. 2. Influence of fluid medium • Liquid measurement (Water, oil, etc.): The flow rate range is usually 0.5-7 m/s, and liquids with viscosity higher than 30cP will significantly increase the measurement lower limit. Gas measurement (air search, steam, etc.): The flow rate range is usually 5-60 m/s, and low-pressure gases may have an increased lower limit flow rate due to low density. • Steam measurement: It is necessary to distinguish between saturated steam and superheated steam, and the flow range should be calculated based on temperature and pressure compensation to determine the actual mass flow rate. Avoid long-term use below the lower limit of 20%, otherwise the signal stability will deteriorate and errors will increa
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