How to measure the flow rate of liquid with high viscosity

The liquid mass flowmeter consists of a metering box and a pair of oval gears installed in the metering box, forming a sealed crescent-shaped cavity with the upper and lower cover plates (due to the rotation of the gears, it is not sealed as a calculation unit for primary displacement. When The liquid to be measured enters the flow meter through the pipeline. Due to the pressure difference generated at the inlet and outlet, a pair of gears are driven to rotate continuously, and the liquid measured by the crescent-shaped cavity is continuously delivered to the outlet. The product of four times the displacement is the total amount of the measured liquid flow. Therefore, it is not difficult to find from the measurement principle of the liquid mass flowmeter that it relies on the pressure head of the measured medium to push the oval gear to rotate for measurement. The flow state of the fluid is irrelevant. When using a liquid mass flowmeter to measure a liquid with a high viscosity, the amount of leakage from the gap between the gear and the metering space will be small. Therefore, the greater the viscosity of the liquid being measured, the smaller the leakage error. The more favorable it is to the measurement, the higher the measurement accuracy. It can be said that the liquid mass flowmeter is the best choice for measuring the flow of high-viscosity liquids. Here, we should remind the majority of users that for fluids with solid particles, it is not suitable to use liquid mass flowmeters , because the solid particles will block the gears, resulting in the inability to measure the flow rate; it should also be noted that it is not recommended to use a liquid mass flowmeter for a medium with gas in the liquid, and its measurement error will be quite large.

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