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『Small caliber gas flowmeter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid 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. Is there a relationship between intelligent gas turbine flowmeter and density?
There is a relationship. In order to evaluate the impact of gas density changes on small-diameter gas turbine flowmeter, the experimental results of variable noise density and some experimental error curves for a gas turbine flowmeter with a diameter of 10mm (DN10) are given.
. Before the experiment, a rotary piston standard flowmeter was first used to calibrate the DN10 gas turbine flowmeter with air as the medium at an absolute pressure of 0.2 MPa. This standard flowmeter can be traced back to a foreign laboratory. Then, calibration tests were conducted on the DN10 gas turbine flowmeter using nitrogen (N2), argon (Ar), helium (random He), and air at working pressures of 0.2 MPa and 0.9 MPa, respectively. The experimental results show that when the gas density ρ varies between 0.3Kg/m3 and 1.5Kg/m3, the experimental lift up error curve of the gas turbine flowmeter changes with the change of gas density, and its maximum deviation value is%. When using air medium for testing, the reproducibility error of the test results is better than ± 0.5%, while when using other types of gases, the reproducibility error is about ± 4%. At a working pressure of 0.2 MPa, the experimental error curves using air, argon, and nitrogen are similar in shape and value; Under the same pressure, the experimental error curve of helium gas differs significantly from the error curve of the aforementioned gas. Worth noting; At a working pressure of 0.2 MPa, the density values of air, argon, and nitrogen are about 2-3 kg/m3, while the valence density of helium is about 0.3 kg/m3. In other words, at a working pressure of 0.9MPa, the