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『Selection of gas vortex flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter 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_600x400.jpg)
2. Parameters required for selection of vortex flowmeter
The parameters required for selection of vortex flowmeter are as follows: the name and type of the measured medium should be clearly stated in the measured medium information.
. If the medium is a mixed gas, the volume percentages of each component must be provided, such as the mixing ratio of oxygen and nitrogen, to ensure the adaptability of the flowmeter to the characteristics of the medium. Working pressure: The pressure value of the medium under normal operating conditions. Maximum and minimum pressure: the limit values of medium pressure fluctuations, used to evaluate the pressure resistance range and stability of flow meters. For example, if the pressure fluctuation range of the medium is 0.5-1.5 MPa, it is necessary to ensure that the flow meter range covers this range. Medium temperature parameter working temperature: the temperature value of the medium under normal operating conditions. Maximum operating temperature: The highest temperature that the medium may reach, taking into account the impact of extreme operating conditions on the flowmeter sensor and materials. For example, high-temperature steam requires the selection of high-temperature resistant vortex flowmeter. Maximum flow rate range of medium: The flow rate value of the medium under peak operating conditions determines the upper limit of the flowmeter range. Common flow rate: The flow rate value of the medium under normal operating conditions, which is randomly used to optimize the linear measurement range of the flowmeter. Minimum flow rate: The flow rate value of the medium under low load conditions, ensuring that the flowmeter can maintain accuracy at