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Industry Information
The use of oval gear and typical advantages
2012-1-19 10:55:07

Characteristics of oval gear flowmeter

The flow measurement has nothing to do with the flow state of the fluid. This is because the elliptical gear flowmeter relies on the pressure head of the measured medium to push the ellipse gear to rotate for measurement.

The larger the viscosity of the medium, the smaller the amount of leakage from the gear and the measuring gap. Therefore, the larger the sticky skin of the test medium, the smaller the leakage error, and the more favorable it is for measurement.

计量精度高,适用于高粘度介质流量的测量,但不适用于含有固体颗粒的流体(固体颗粒会将齿轮卡死,以致无法测量流量)。 The elliptical gear flowmeter has high measurement accuracy and is suitable for measuring the flow of high-viscosity media, but it is not suitable for fluids containing solid particles (solid particles will seize the gear and make it impossible to measure the flow). If the test liquid

When there is gas in the mass, it will also cause measurement error.

Use of oval gear flowmeter


The elliptical gear flowmeter correctly installed in accordance with the requirements can ensure sufficient accuracy when used. Generally, the accuracy of the accumulated value can reach level 0.5, which is a more accurate flowmeter. However, if it is tested when used

If the quality flow is too small, the effect of the leakage error of the instrument will be prominent, and sufficient measurement accuracy cannot be guaranteed. Therefore, the oval gear flowmeters of different models and specifications have a permissible value for the minimum used flow rate.

When the amount is larger than the lower limit flow allowable value, the measurement accuracy can be guaranteed.


Secondly, when using an elliptical gear flowmeter, pay attention to the temperature of the measured medium must not be too high, otherwise it will not only increase the measurement error, but also may cause the gear to jam. For this reason, the oval gear flowmeter

Use within the temperature range. After long-term use, the gears inside the oval gear flowmeter will be corroded and worn, which will affect the measurement accuracy. Therefore, it is necessary to pay attention to observation and take it apart regularly for inspection.

Calibration is performed regularly.


Oval Gear Flowmeter Features


The flow measurement has nothing to do with the flow state of the fluid. This is because the elliptical gear flowmeter relies on the pressure head of the measured medium to push the ellipse gear to rotate for measurement. Viscosity medium leaks from gears and metering gaps

The smaller the amount of leakage, the larger the stickiness of the test medium, the smaller the leakage error, and the better the measurement. The elliptical gear flowmeter has high measurement accuracy and is suitable for measuring the flow of high-viscosity media, but it is not suitable for solid particles.

Fluid (solid particles can jam the gear and make it impossible to measure flow). If gas is contained in the liquid medium to be measured, it will also cause measurement errors

Oval gear flowmeter installation


在安装前应清洁管道. The oval gear flowmeter should be cleaned before installation. If the liquid contains solid particles, a filter must be installed upstream of the pipeline; if it contains gas, an exhaust device should be installed. Oval gear flowmeter

There are certain requirements. It can be installed horizontally or vertically. During installation, the elliptical gear rotation axis of the flow meter should be parallel to the ground.



Oval gear flowmeter typical application:

可用于多种粘度范围介质的测量,尤其适用于测量低粘度的介质,产品广泛应用于石油、石化、天然气、化工、造纸等行业,用于测量小管径的 Oval gear flowmeter can be used to measure a variety of viscosity range media, especially suitable for measuring low viscosity media. The products are widely used in petroleum, petrochemical, natural gas, chemical, papermaking and other industries.

Tiny flow measurement.


Main advantages of oval gear flowmeter:


1 Caliber from 8 ~ 250mm


2 There are many choices of shell material: aluminum, stainless steel and cast steel, PPS, bronze, etc.

3 There are many options for bearing materials: ceramic, bronze, Hastelloy, carbide, PPS, stainless steel sealed bearings, etc.

4 shaft material: 316 stainless steel;


5 O-rings are available in VITON, fluorine rubber, stainless steel, and Teflon;


6 Range ratio 10: 1, up to 50: 1


7 Accuracy is ± 0.2% and ± 0.5%, repeatability ± 0.06%, 0.16%


8 Requirement for straight pipe section during installation: 5D + 3D, filter needs to be installed;


9 viscosity up to 1,000 000CP;

10 Pressure level up to 6.3Mpa


11 The temperature resistance level can reach -20 ~ 400 ℃