Can vortex flow meters be used with an enlarged diameter?
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This post was last edited by wx_Wang81529 on 2024-12-1 at 16:14. There is currently a DN80 pipeline with a minimum flow rate of 40 cubic meters per hour and a maximum flow rate of 100 cubic meters per hour; the fluid being handled is water. The vortex flow meter specified in the design calculations has a diameter of DN100 – is this normal? By the way, can a control valve be used with an enlarged diameter?
It is normal for the diameter of a vortex flow meter to be larger than that of the original pipeline; this is done primarily to ensure that the flow velocity remains within the operating range of the flow meter, thereby preventing inaccurate measurements or equipment damage caused by excessively high flow velocities. Therefore, an vortex flow meter larger than DN25 can be selected. Control valves can also be used with an expanded diameter, but it is necessary to ensure the control accuracy of the valve and the flow properties of the fluid. It is generally recommended to use a diameter that is the same as or similar to that of the pipeline, in order to ensure optimal control performance and system stability. Increasing the valve port diameter may affect the control accuracy or cause other adverse flow effects. .
The apparent diameter is too small. 40-100 liters, flow rate of 10 M/s; a pipe with a minimum diameter of DN50 is required.
An increase in the flow meter section size is not a problem; the key is to ensure that the straight sections before and after the expansion meet the required specifications.
40-100 liters; 80 is enough
Then I would recommend using Yokogawa’s vortex flow meter; the DN80 model can cover a measurement range of 4.3–142 m³/h, which is sufficient for what you’ve described. With many domestic manufacturers, a ratio of 1:10 means that it might be necessary to increase the pipe diameter. Of course, when considering either reducing or increasing the diameter, it’s important to ensure that there are enough straight sections of pipe.