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Advantages and disadvantages of china Vortex street flowmeter products
Advantages and disadvantages of china Vortex street flowmeter products
Data: 2022-03-06 02:04

China Vortex street flowmeter products is a new type of flowmeter with international advanced level developed based on Carmen vortex principle. It is mainly used for the flow measurement of medium fluid in industrial pipeline, such as gas, liquid, steam and other media. It is widely used in petroleum, chemical industry, metallurgy, papermaking and other industries. However, any instrument has certain limitations in product performance, and vortex flowmeter is no exception.


1. Advantages of china vortex street flowmeter products
(1) The china vortex street flowmeter product has no movable parts, and the measuring element has the advantages of simple structure, reliable performance and long service life.
(2)China Vortex street flowmeter has a wide measuring range. The range ratio can generally reach 1:10.
(3) The china volume flow of vortex street flowmeter is not affected by the thermal parameters such as temperature, pressure, density or viscosity of the measured fluid. Generally, separate calibration is not required. It can measure the flow of liquid, gas or steam.
(4) It causes little pressure loss.
(5) The accuracy is high, the repeatability is 0.5%, and the amount of maintenance is small.
2. Disadvantages of china vortex street flowmeter products
(1) The volume flow of china vortex street flowmeter products under working condition is not affected by the temperature, pressure, density and other thermal parameters of the measured fluid, but the final measurement result of liquid or steam shall be mass flow, and for gas, the final measurement result shall be standard volume flow. Mass flow or standard volume flow must be converted by fluid density, and the change of fluid density caused by the change of fluid working condition must be considered.
(2) The main factors causing the flow measurement error are: the measurement error caused by the uneven flow velocity of the pipeline; The medium density when the fluid working condition changes cannot be determined accurately; The wet saturated steam is assumed to be dry saturated steam for measurement. If these errors are not limited or eliminated, the total measurement error of vortex flowmeter will be very large.

(3) Poor vibration resistance. External vibration will cause measurement error of vortex flowmeter, and even can not work normally. The high velocity impact of channel fluid will cause additional vibration of the cantilever of vortex street generator and reduce the measurement accuracy. The influence of large pipe diameter is more obvious.
(4) Poor adaptability to measuring dirty media. The generator of vortex flowmeter is very easy to be polluted by medium or entangled by dirt, which changes the geometry size and has a great impact on the measurement accuracy.
(5) High requirements for straight pipe section. Experts pointed out that the straight pipe section of vortex flowmeter must ensure the first 40d and the second 20d in order to meet the measurement requirements.
(6) Poor temperature resistance. Generally, vortex street flowmeter can only measure the fluid flow of media below 300 ℃.

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