High viscosity flow meter is the flow meter measures the flow rate of viscous fluid flow. LCD display Oval Gear High Viscosity Flow Meter is an ideal for measuring diesel gasoline and other media.

High viscosity liquids

High-viscosity liquid means that the liquid is viscous and thick, which is different from general liquids and non-Newtonian fluids (mud, pulp). The activity is slow and it is very difficult to filter by simple methods.

What’s more, in addition to some dust, the liquid also contains colloidal particles that are not completely dissolved.

For example: solutions such as rubber, paraffin, cellulose acetate, viscose, polyacrylonitrile, paint and animal glue.

Read more about: Liquid Flow Meters Guide

Oval Gear High Viscosity Flow Meter

The oval gear flowmeter is particularly suitable for measuring high viscosity media. And it is not sensitive to changes in the viscosity of the liquid being measured.

The measurement of the oval gear flowmeter has nothing to do with the flow state of the fluid. The higher the viscosity of the medium, the smaller the leakage from the gear and the metering gap. Therefore, the greater the viscosity of the measured medium, the smaller the leakage error, which is more beneficial to the measurement.

Measurable medium:
Fuel, diesel, gasoline, heat transfer oil, hydraulic oil, kerosene, tar, petroleum, crude oil, asphalt, resin and other liquids. Especially suitable for the measurement of high viscosity liquids.

Model	LC-NA Cast Iron with high viscosity type	LC-NE Cast steel with high viscosity type
Nominal Pressure Mpa	1.6	6.4
Temperature Range ℃	-10~+80;  +100~+180
Accuracy	0.5    ;0.2
Nominal Diameter (mm)	Flow   range(m3/h)
	Viscosity
	200~2000 mPa·s
10	0.02-0.2
15	0.075-0.75
20	0.15-1.5
25	0.3-3
40	0.75-7.5
50	1.2-12
80	3-30
100	5-50
150	9.5-95
200	17.4-174

If you need to measure higher viscosity liquids. Please contact our sales engineer.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

Oval gear flowmeter display mode selection:

The oval gear flowmeter is a mechanical instrument, and the display can be mechanical or liquid crystal display. Make a reasonable choice according to the different requirements of users.

Of course, the oval gear flow transmitter can also be combined with the secondary instrument to form an oval gear flow meter.

Flow meters with LCD displays now occupy the vast majority of the flow meter market. This is because the LCD display can display instantaneous flow, cumulative flow and other information at the same time. Some flow meters with temperature and pressure compensation can even display temperature and pressure information. Such as vortex flowmeter.

How to choose a high viscosity flow meter?

You may often encounter some high viscosity flowmeter selection problems. For example: What flowmeter is used for viscosity above 10000?

Under normal circumstances, when we encounter high-viscosity media (such as glue, eye drops, asphalt, etc.), the first thing that comes to mind is that impeller-type flowmeters are not suitable. A positive displacement flow meter can be used. The positive displacement flow meter includes a waist wheel, an oval gear, etc.

Are they all suitable?

Below we will introduce several flow meters suitable for measuring high viscosity media:

How to choose a high viscosity flow meter?

When choosing a high viscosity flow meter, it is important to consider the type of fluid being measured, the required accuracy of measurement, the operating environment, and the desired features.

Sino-Inst offers a wide variety of high viscosity flow meters to meet these needs.

For example, when we select a high viscosity flow meter for you. We will generally confirm with you first:

1. Types of media
2. Medium viscosity
3. Pipe diameter
4. Flow range
5. Temperature and pressure
6. Installation dimensions
7. What signal output is required.
8. Material requirements, etc.

For fluids with a high viscosity , such as oil or molasses, a positive displacement flow meter is often the best choice. These meters work by measuring the amount of fluid that is displaced as it flows through the meter. This type of meter is very accurate, but can be expensive.

Sino-Inst also offers a variety of other high viscosity flow meters, including Coriolis flow meters and mass flow meters. These meters are less common, but may be the best choice for specific applications.

Extended reading: Hydraulic oil flow measurement solutions.

Measuring principle of Oval Gear High Viscosity Flow Meter

When the measured liquid enters the oval gear flowmeter through the pipeline. The pressure difference generated at the inlet and outlet pushes a pair of gears to continuously rotate. The liquid measured by the lunar cavity is continuously delivered to the outlet. The product of the number of revolutions of the elliptical gear and four times the displacement per time is the total amount of the measured liquid flow.

Therefore, it is not difficult for us to find from the measurement principle of the oval gear flowmeter that it relies on the pressure head of the measured medium to push the oval gear to rotate for measurement, and has nothing to do with the fluid flow state.

For fluids with solid particles, oval gear flowmeters are not suitable. Because the solid particles will jam the gears, the flow cannot be measured.

It should also be noted that the use of oval gear flowmeters is not recommended for media with gas in the liquid. Its measurement error will be quite large.

When we use oval gear flow meters to measure liquids with high viscosity, there is less leakage from the gap between the gear and the metering.

Therefore, the greater the viscosity of the liquid being measured, the smaller the leakage error, and the more beneficial it is for the measurement, the higher the measurement accuracy.
It can be said that the oval gear flowmeter is the best choice for measuring the flow of high-viscosity liquids.

Extended reading: Featured Hydraulic Flow Meters For Sale

Installation and use of Oval Gear High Viscosity Flow Meter

1. The oval gear flowmeter should be equipped with a filter, and the arrows on the two shells point to the same flow direction.
2. When the measured liquid contains gas, a gas separator should be installed before the flowmeter.
3. Regardless of whether the pipeline is installed vertically or horizontally, the oval gear shaft in the flowmeter is installed in a horizontal position. (That is, the dial should be perpendicular to the ground).
4. When the oval gear flowmeter is installed correctly, if it is difficult to see the reading, the counter can be turned 180° or 90°.
5. Before installing the new flowmeter, use a bamboo stick to push the gear from the exit several times. If it is found to be immobile, it can be soaked with gasoline. (Avoid memory deposits after factory inspection)
6. The throttle valve should be installed at the inlet of the flowmeter, and the opening/closing valve should be installed at the outlet. When using the opening/closing valve, it should be pneumatically operated slowly and not suddenly open.
7. It is strictly forbidden to use line sweeping steam to pass through the flow meter.
8. In continuous use, the flowmeter must be equipped with a bypass pipe.
9. Before installing the oval gear flowmeter, the pipeline must be flushed. When flushing, use a straight pipe section (instead of the oval flowmeter position) to prevent welding slag and debris from entering the flowmeter.
10. It is strictly forbidden to check the flowmeter composed of cast iron and cast steel with water.
11. When the flowmeter is in use, the flow rate shall not exceed the technical requirements. It is better for the flowmeter to work at 50~80% of the maximum flow.
12. If the measured liquid is chemically corrosive, a stainless steel flow meter or Ocr15Ni12MO2Ti flow meter must be used.
13. The installation method of oval gear flowmeter is as shown in the figure.

More Liquid Flow Measurement Solutions

Sino-Inst is a manufacturer of LCD Display Oval Gear High Viscosity Flow Meter. We supply over 20 High Viscosity Flow Meters. Oval Gear Flow Meters are one of the most commonly used. Because it can choose cast iron, cast steel, stainless steel and other materials. Can meet the needs of a variety of measurement media. At the same time, it can be configured with ordinary mechanical display or LCD smart display, output pulse or 4-20mA signal. Can meet the needs of most users.

The LCD Display Oval Gear High Viscosity Flow Meter has high measurement accuracy. The basic error is generally ±0.5%R, and can be ±0.2%R or higher in special cases. Especially suitable for use in the field where high precision measurement is required.

The LCD Display Oval Gear High Viscosity Flow Meter has no influence on the metering accuracy when measuring the flow field distortion of the rotating flow and the pipe baffle, and has no requirement for the straight pipe section in front.

LCD Display Oval Gear High Viscosity Flow Meter can be used for the measurement of high viscosity fluids. The flow range is wide, generally 10:1 to 5:1. Special up to 30:1 or greater.

Sino-Inst’s High Viscosity Flow Meters, made in China, have good quality, with better prices. Our High Viscosity Flow Meters are widely used in China, India, Pakistan, USA and other countries.

Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a High Viscosity Flow Meter, level sensors, or other equipment, please give us a call.

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