The issue of range adjustment when using vortex flowmeters with different media
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This post was last edited by 122605619 on 2011-2-15 at 16:09. Our unit has an old vortex flow meter with a range of 0–4 tons; the specific gravity used for measurement previously was 0.97. Now it is intended to be used in a new pipeline, where the specific gravity of the new fluid is 0.8. Should the range of the flow meter be adjusted according to the density of the fluid? For example, should it first be converted to a volume flow rate range, and then that range converted into a mass flow rate range for the new fluid? Using the formula 4÷0.97×0.8=3.298, or is it sufficient to simply adjust the specific gravity value in the parameters of the vortex flow meter?
Is it a gas or a liquid being measured? If it is a gas, temperature and pressure compensation must be applied to obtain the volumetric flow rate under standard conditions; in reality, this corresponds to a mass flow rate. For liquids, the volumetric flow rate is measured, and temperature compensation is applied when measuring the flow rate of water
What is being measured is the liquid; our engineers have ultimately modified the specific gravity value. When placing the order, parameters with a specific gravity of 0.97 were provided to the manufacturer, but now it has been changed to use a liquid with a specific gravity of 0.8 in the pipelines
Such modifications are not feasible; the selection of vortex flowmeters and parameters such as their range are determined using the manufacturer’s specialized software. Changes in the medium can lead to changes in parameters such as density, viscosity, and vapor pressure. These parameters are all factors that affect the range and accuracy of flow measurement. It is best to have the manufacturer recalculate the medium parameters and operating conditions before modifying the range, etc.
The density parameter should be modified, along with the parameters of operating conditions such as pressure and temperature. After all, a vortex flow meter is a flow meter used for measuring flow velocity; it first measures volumetric flow rate, which is then converted into mass flow rate based on the density value. Is there a significant difference in the viscosity of these two liquids?
Thank you all for your advice; I’ve learned a lot