QINSUN interprets the reasons for the declining accuracy of liquid turbine flowmeters-

The moderate drop of the liquid turbine flowmeter during use may be due to the following reasons:
1. Fibrous or viscous impurities in the fluid are attached to the rotating part of the flowmeter, which increases the resistance rotation and causes instrument failure. The indication value decreases, and a negative error occurs, which is unfavorable to the supplier of the fluid.
2. Changes in fluid temperature and pressure can cause the liquid in the pipeline to escape from the air it contains, or because the pressure in the pipeline is lower than the saturation vapor pressure of the fluid, some of the liquid will become vapor, or it may be caused by the load of the medium. The pressure causes the outside gas to be sucked into the pipeline, and the gas flows out with the measured liquid, resulting in an increase in the value of the indicator of the instrument and a positive error, which qui is not good for the buyer of the fluid.
3. There are usually impurities in the medium, which will cause the bearings and shafts to wear, increasing the gap between the two, destroying the dynamic balance of the moving parts, reducing the speed or dirt entering the gap, causing an increase in resistance to movement and a decrease in speed. These reasons all cause the display value of the instrument to decrease, and a negative error occurs, which is unfavorable to the supplier of the fluid.
4. The harsh working environment will also have a great impact on the measurement results, such as electromagnetic field interference, dust, high temperature, vibration, humidity, etc., which may cause malfunction or damage. failure of the turbine flow sensor, directly causing the turbine flow meter. The indication error, the error can be positive or negative, littlet not be obvious or may be completely invalid. For the above phenomenon, when it is more serious, the problem can be found from the comparison of the process operating status, and it is easy to take corresponding measures. However, in its early stages, the problems cannot be detected without taking special measures.

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