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LC Series Oval Gear Flow Meters-Mechanical Measurement

Oval gear flow meter is used for precise continuous or intermittent measurement of the total flow or instantaneous flow rate of liquids in pipelines.

● The Oval Gear Flow Meter measures with high accuracy. It can reach level 0.2 and level 0.5.
● Suitable for measuring the flow rate of high viscosity media. The greater the viscosity of the medium, the smaller the leakage error, which is more conducive to measurement.
● There is no need for straight pipe sections before and after the flow meter, and there is no need to install straight pipe sections.
● Available in cast iron, cast steel, and stainless steel materials.
● Cast iron oval gear flowmeter is widely used in the measurement of various oil products and non-corrosive liquid media in cast iron.
● Cast steel oval gear flowmeter can measure high-pressure, low-corrosive media.
● Stainless steel oval gear flowmeter is widely used in corrosive liquid media such as acids, alkalis, and salts.
● Optional mechanical pointer, no power required. You can also choose 24VDC power supply and support signal output.

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Oval Gear Flow Meter Description

LC series oval gear flowmeter is one of the typical volumetric flowmeters, also known as displacement flowmeter and gear flowmeter. It is particularly suitable for flow measurement of heavy oil, polyvinyl alcohol, resin and other medium with higher viscosity.

Mechanical measuring elements are used to continuously divide the fluid into individual known volume parts. The total flow volume is measured based on the number of times the metering chamber is filled and drained of that volume portion of fluid, successively and repeatedly.

Can be made of different materials (cast iron, cast steel, 304 stainless steel, 316 stainless steel). It is suitable for flow measurement work in industrial sectors such as chemical industry, petroleum, electric power, metallurgy and food.

LC Series Oval Gear Flow Meters Technical Parameters

1. Oval gear flowmeter of iron casting type, cast steel type and stainless steel type

Model	LC—A Iron casting type	LC—B Stainless steel type	LC—E Cast steel type
Nominal pressure MPa	1.0 1.6	2.5 4.0 6.4	1.0 1.6
Medium temp.	Conventional pointer type: -20~+80℃； High-temperature pointer type: -20~+200℃； Conventional LCD type: -20~+60℃； High-temperature LCD type: -20~+150℃；
Accuracy	0.50%
Nominal diameter	Viscosity: 0.6—2mPa.s	Viscosity: 2—200mPa.s
10	0.2-0.4 m³/h	0.08-0.4 m³/h
15	0.6-1.5 m³/h	0.3-1.5 m³/h
20	0.8-3 m³/h	0.6—3 m³/h
25	1.2-6 m³/h	0.8-6 m³/h
40	5-15 m³/h	3-15 m³/h
50	6-24 m³/h	4-24 m³/h
65	10-40 m³/h	8-40 m³/h
80(light type)	10-40 m³/h	8-40 m³/h
80(heavy type)	15-60 m³/h	10-60 m³/h
100	30-100 m³/h	15-100 m³/h
150	45-190 m³/h	34-190 m³/h
200	68-340 m³/h	56-340 m³/h

2. Oval gear flowmeter of high viscosity type

Model	LC—NA High-viscosity iron casting type	LC—NE High-viscosity cast steel type	LC-NB High-viscosity stainless steel type
Nominalpressure MPa	1.6	1.6、2.5、4.0、6.3	1.6、2.5、4.0、6.3
Medium temperature	Conventional pointer type: -20~+80℃； High-temperature pointer type: -20~+200℃； Conventional LCD type: -20~+60℃； High-temperature LCD type: -20~+150℃；
Accuracy	0.50%
Nominal diameter	Viscosity: 200—1000mPa.s	Viscosity: 1000-2000mPa.s
10	0.04—0.3m3h	0.03-0.2 m³/h
15	0.2-1.0 m³/h	0.1-0.7 m³/h
20	0.4-2.1 m³/h	0.25-1.5 m³/h
25	0.6-4.2 m³/h	0.6-3m3h
40	2.1-10.5m3h	1.0-7.5 m³/h
50	2.4-16.8m3h	2-12 m³/h
65	6-28 m³/h	4-20 m³/h
80(light type)	6-28 m³/h	4-20 m³/h
80(heavy type)	8-42 m³/h	6-30 m³/h
100	10-70 m³/h	10-50 m³/h
150	27-133 m³/h	19-95 m³/h
200	48-238 m³/h	34-170 m³/h

3. High-Accuracy oval gear flowmeter (0.2%)

Model	LC—A Iron casting type	LC—B Stainless steel type	LC—E Cast steel type
Nominalpressure MPa	1.6	1.6、2.5、4.0、6.3	1.6、2.5、4.0、6.3
Medium temperature	Conventional pointer type: -20~+80℃； High-temperature pointer type: -20~+200℃； Conventional LCD type: -20~+60℃； High-temperature LCD type: -20~+150℃；
Accuracy	0.20%
Nominal diameter	Viscosity: 0.6—2 mPa.s	Viscosity: 2—200 mPa.s
10	–	0.2-0.4 m³/h
15	–	0.5-1.5 m³/h
20	1.5-3 m³/h	1-3 m³/h
25	3-6 m³/h	1.26 m³/h
40	8-15m3h	5-15 m³/h
50	12-24m3h	8-24 m³/h
65	20-40m3h	10-40 m³/h
80(light type)	20-40m3h	10-40 m³/h
80(heavy type)	30—60m3h	15—60 m³/h
100	40-100m3h	20-100 m³/h
150	90-190m3h	56-190 m³/h
200	170-340m3h	68-340 m³/h

4. High-Accuracy and high-viscosity oval gear flowmeter (0.2%)

Model	LC—NA High-viscosity iron casting type	LC—NE High-viscosity cast steel type	LC-NB High-viscosity stainless steel type
Nominalpressure MPa	1.6	1.6、2.5、4.0、6.3	1.6、2.5、4.0、6.3
Medium temperature	Conventional pointer type: -20~+80℃； High-temperature pointer type: -20~+200℃； Conventional LCD type: -20~+60℃； High-temperature LCD type: -20~+150℃；
Accuracy	0.20%
Nominal diameter	Viscosity: 200—1000mPa.s	Viscosity: 1000-2000mPa.s
10	0.08-0.3 m³/h	0.06-0.2 m³/h
15	0.3-1.0 m³/h	0.2-0.7 m³/h
20	0.6-2.1 m³/h	0.5-1.5 m³/h
25	1-4.2 m³/h	0.8-3 m³/h
40	3-10.5 m³/h	2-7.5 m³/h
50	4-16.8 m³/h	3-12 m³/h
65	8-28 m³/h	6-20 m³/h
80(light type)	8-28 m³/h	6-20 m³/h
80(heavy type)	10-42 m³/h	8-30 m³/h
100	15-70 m³/h	12-50 m³/h
150	34-133 m³/h	30-95 m³/h
200	56-238 m³/h	50-170 m³/h

Counters and codes of various functions

Functions	Model A1	Model A	Model Z	Model 13	Model J1	Model ELZ
Pointer, six-digit roller totalizer	●	●
Pointer, six-digit roller totalizer, zero return	●	●	●
Pointer, with signal	●				●
Single signal (signal output only)				●
LCD display (instantaneous, cumulative, 420mA, pulse, RS485)						●

Model and Material of Main Parts

Name	Iron casting type	Cast steel type	High-temperature iron casting type	High-temperature cast steel casting type	High-viscosity iron casting type	High-Viscosity cast steel type	Stainless steel	13
Model	LC-A	LC-E	LC-TA	LC-TE	LC-NA	LC-NE	LC-B	LC-13
Body Material	Iron casting	Cast steel	Iron casting	Cast steel	Iron casting	Cast steel	Stainless steel	Various Materials
Gear Material	Iron casting	Iron casting	Iron casting	Iron casting	Iron casting	Iron casting	Stainless steel	Various Materials

Get Stable Oval Gear Flow Meters

The LC series oval gear flowmeter produced and supplied by Sino-Inst is of high quality and high precision! It can be used with quantitative control to achieve quantitative canning. High viscosity and high temperature measurement asphalt can be customized!

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Oval Gear Flowmeters Applications

Oval gear flowmeter is mainly used to measure liquid media with high viscosity. For example: glue, asphalt, heavy oil, thermal oil, hydraulic oil, etc. have relatively high viscosity.

The fluidity of this type of medium is relatively low, so oval gear flowmeters are usually suitable for detection of low-flow media. It is very suitable for flow measurement work in industrial sectors such as chemical industry, petroleum, medicine, electric power, metallurgy and food.

● The LC-A cast iron oval gear flowmeter is widely used in the measurement of various oil products and non-corrosive liquid media on cast iron.
● The LC-E cast steel oval gear flowmeter is used for the measurement of high pressure and low corrosive media.
● The LC-B stainless steel oval gear flowmeter is widely used in the measurement of liquid media with strong corrosive liquids, such as acids, alkalis, salts and organic compounds.

LC series Oval Gear Flow Meters are suitable for:

• Bio Diesel Blending & Production
• Lubricant Blending & Dispensing
• Glycols Process Measurement
• Diesel Fuel Additive Blending
• Hydraulic Fluid Measurement
• Sealants & Adhesive Manufacturing
• Fuel Measurement – Basic
• Test Stands
• Epoxy/Glue Production
• Fuel Measurement – Advanced
• Polyurethane Foam Ratio Blending
• Polymer Production & Measurement
• Greases / Lubricants
•Isocyanates
• Acids
• Ethanol Blends
• Agriculture Chemical Blending & Dispensing
• High Viscosity Fluid Measurement
• Heating Oil Measurement
• Ink blending
• DI and General Water Loop Measurement
• Boiler Fuel Measurement
• Solvent Manufacturing, Blending, Dispensing
• Additive Injection & Blending
• Bunker & Vessel Fuel Measurement
• Paint & Coating Manufacturing
• Acids & Bases Measurement

The media that the LC series oval gear flowmeter can measure:

• Asphalt
• Thermal oil
• Fuels
• Epoxies and Adhesives
• Glycols
• Oils
• Sealants
•Water
•Polymers
• Solvents
• Polyols • DI Water
•Inks
• Greases / Lubricants
•Isocyanates
• Acids
• Chemical Additives
• Fuel Additives
• Emulsions
• Bases
• Clean Process Fluids
• Agricultural Chemicals

LC Series Oval Gear Flow Meters-Mechanical Measurement Detail Display

More Detail

Structure and working principle of Oval Gear Flow Meter

Oval gear flow meter consists of flow transmitter and counting mechanism. A high temperature flowmeter if formed if a radiator is installed between the transmitter and the counting mechanism.

The transmitter consists of a metering chamber and a sealing coupling with a pair of elliptical gear rotors.

The counting mechanism comprises a deceleration mechanism, a regulating mechanism, a counter and a transmitter.

When the measured liquid enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet pushes a pair of gears to continuously rotate, and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of four times the secondary displacement is the total amount of the measured liquid flow.

The elliptical gear generates a torque to make it rotate under the action of the pressure difference △p of the measured medium.

The rotor 1 and the rotor 2 are alternately driven by one to rotate the other. There are two magnets on each rotor as signal generating elements. There is a magnetic signal detecting element at the center of the two axes at the bottom of the cavity. Whenever the magnet turns to the detecting element, the sensor counts as a pulse.

Each pulse corresponds to a certain amount of medium discharge F, F=XXml/p, so the volume flow Qm per unit time can be obtained: Qm=F*H, F is the amount of medium removed by each pulse; H pulse per unit time number.

Installation and Use of Oval Gear Flowmeter

1. A matching filter shall be installed before the flowmeter, and the outlet of the matching filter is connected to the inlet of the flowmeter. The arrow points on both bodies are consistent with the flow direction of the liquid.

2. When the liquid under test contains gas, the gas elimination filter should be installed before the Flowmeter.

3. No matter whether the pipeline is installed vertically or horizontally, the oval gear in the flowmeter shall be installed in a horizontal position (i.e. the gauge disc shall be perpendicular to the ground).

4. When the flowmeter is properly installed, if it is not easy to read, turn the counter to 180 degrees or 90 degrees.

5. The new flowmeter pushes the elliptical gear several times from the exit with a bamboo stick before installation. If it doesn’t move, soak in diesel oil (Avoid sediment after factory check).

6. Flow control valve should be installed at the inlet of the Flowmeter, and open and close valve is installed at the outlet. When using open and close valve, start slowly, do not suddenly open to prevent “water hammer” phenomenon.

7. Before installing the flowmeter on the new pipeline, the pipeline needs to be flushed, and the straight pipe section (instead of the position of the Flowmeter) is used to prevent welding slag, sundries and so on from entering the flowmeter.

8. It is strictly forbidden to check the flowmeter of cast iron and steel with water.

9. The flow size of the flowmeter in use shall not exceed the technical requirements. The flowmeter operates at a maximum flow rate of 50-80%.

10. If the tested liquid is chemically corrosive, a flowmeter of stainless steel should be selected.