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Analysis of the advantages and disadvantages of vortex flowmeter

There are many users of vortex flowmeters. Since so many people use vortex flowmeters, there must be some reasons. The following is a summary of the advantages of vortex flowmeters. Of course, there are limitations, for your reference. .

1. The vortex flowmeter has a simple and firm structure and is easy to install and maintain.

2. There are many types of fluids, such as liquid \\ gas \\ steam and some mixed fluids.

3. Compared with the differential pressure type float flowmeter, the accuracy is high, generally up to about 1%.

4. The range width is 10:1 or 20:1.

5. The pressure loss is small, about 1/2~1/4 of the orifice flowmeter.

6. Output pulse signal proportional to the flow rate, suitable for total metering, no zero point migration.

7. Within a certain Reynolds number range, the output frequency signal is not affected by fluid properties (density \\ viscosity) and composition. The meter factor is related to the shape and size of the vortex generator and the pipe, and can be verified in a typical medium. Suitable for a variety of media.

8. The corresponding vortex detection technology can be selected for different objects.

limitation:

1. Vortex flowmeter is not suitable for low Reynolds number measurement, and its application is limited in high viscosity, low flow rate and small diameter.

2. The instrument with vibration resistance should be selected in the place where the pipe has vibration.

3. The stability of the vortex separation is affected by the distortion of the flow velocity distribution and the swirling flow. The straight pipe section of sufficient length should be arranged according to the different types of chokes on the upstream side. Generally, the length of the straight pipe section of the throttling differential flowmeter can be installed. .

4. Compared with the turbine flowmeter, the meter factor is low, the resolution is low, and the larger the diameter, the lower the diameter, generally applied to small and medium caliber (DN25~DN300).

5. The instrument is still lacking test data in the application of pulsating flow and mixed phase flow.

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