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What is the difference between a thermal mass flowmeter and a vortex street?
The vortex flowmeter is a volumetric flowmeter, while the thermal gas flowmeter is a mass flowmeter. The measurement principles of the two are different. As for the vortex flowmeter, it is more widely used than the backup flowmeter, and can measure gases, liquids, and vapors, while the thermal flowmeter can only measure gases and is much cheaper in price.. Vortex flow meters have requirements for the installation of straight pipe sections in measurement pipelines, generally requiring 10 in the front and 5 in the back, while thermal mass flow meters have no restrictions. Vortex flow meters are widely used to measure gases, liquids, and vapors, while thermal flow meters are generally only used to measure gases or small flow liquids. There is a domestic flowmeter supplier that specializes in researching these two types of flowmeters, Hefei Kemeijie.
2. Precautions and Regulatory Requirements for Installation of Vortex Flow Meter
When installing a vortex flow meter, it is necessary to strictly follow the following precautions and regulatory requirements to ensure measurement accuracy and equipment life:
1. Pipeline laying direction and medium compatibility. Horizontal pipeline installation: The influence of the measured medium temperature on the transmitter needs to be carefully considered.
. High temperature media may cause thermal expansion or performance drift of internal components of the transmitter, thereby affecting measurement accuracy. Suggestion: Avoid direct contact of high-temperature media with the transmitter, and if necessary, use insulation sleeves or extended pressure pipes. When installing h
Secondly, choose a location away from the vibration source: Vortex flowmeters are sensitive to mechanical vibrations, which may cause detection components (such as piezoelectric crystals) to send signals incorrectly.
. Suggestion: The installation location should be at least 1 meter away from vibration sources such as pumps and compressors, and vibration reduction brackets should be installed if necessary. Avoid installation within 5 times the diameter downstream of pipeline bends and valves to prevent false signals caused by fluid turbulence. Stable environment requirements: The flowmeter body and connecting pipelines must be firmly fixed to avoid deformation or leakage caused by pipeline stress. Plug in flow meters must ensure that the insertion depth meets the requirements to prevent displacement of the detection components.Third, the straight pipe section requires matching of the inner diameters of the front and rear straight pipe sections: The difference between the inner diameters of the front and rear straight pipe sections of the flowmeter and the inner diameter of the flowmeter body should be less than 3%, otherwise measurement errors may occur due to uneven flow velocity distribution.
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