Oval gear flow meter is one of the typical positive displacement flow meters. Measure the flow of liquid filling the pipeline under a certain pressure.

Pointer Type Oval Gear Flow Meter

Oval gear flow meter is a pointer display type positive displacement flowmeter. The word wheel accumulates counting, and can be equipped with a zero return device. Oval gear flowmeters are widely used in liquid flow control in various industrial fields. Applicable to various types of liquid measurement, such as crude oil, diesel, gasoline, etc. Choose different manufacturing materials, such as crude oil, diesel, gasoline, etc. can be measured.

Sino-Inst offers a variety of Oval Gear Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

Features of Pointer Type Oval Gear Flow Meter

  • High measurement accuracy: 0.2 and 0.5;
  • The mechanism is simple, sturdy and reliable.
  • Particularly suitable for measuring medium with high viscosity
  • Easy to install. There is no need for straight pipe sections before and after the flowmeter, and there is no need to install straight pipe sections.
  • Cast iron oval gear flowmeter, widely used in various oil products and measurement of non-corrosive liquid medium for cast iron
  • Cast steel oval gear flow meter for measuring high pressure and low corrosive medium
  • Stainless steel oval gear flowmeter, widely used in corrosive liquid media, such as acid, alkali, salt
  • In order to prevent the gear of the flowmeter from being jammed by impurities, a filter must be installed upstream of the flowmeter.
  • Explosion-proof grade: ExiaIICT6

Specifications of Pointer Type Oval Gear Flow Meter


Flange connection: cast iron, cast steel, SS304, SS316L 

More than DN200 can be customized

Threaded connection: cast iron, cast steel, stainless steel


Connection type

Flange (Default), thread and clamp(Need to customize)

Medium viscosity

0~200mPa.s(Normal type), 200~2000mPa.s(High-viscosity type), 2000~5000mPa.s(Need to customize)

Accuracy level

±0.5%R  (±0.2%R Need to customize)

Ratio of measuring range


Instrument material

Body: cast iron, cast steel, stainless steel            

Gear: cast iron, stainless steel

Flowmeter jacket

None(Default), flowmeter with jacket(Suitable to maintain the temperature of the medium, Need to customize)

Temperature level

Environment temperature:-20ºC~+60ºC; Relative humidity:5%~90%.
Medium temperature:-20ºC~+80ºC(Normal type); 
High-temperature LCD type:+100~150ºC (need to be customized)
High-temperature mechanical pointer type:+100ºC~+200ºC(need to be customized)

Pressure level

Cast iron:1.6MPa,  Cast steel and Stainless steel:1.6MPa(default), 2.5MPa,4.0MPa, 6.3MPa (Can be customized according to different diameter)

Working power supply

No power supply required(Mechanical pointer type, no signal output), External power supply: 12/24VDC ±15%,(suitable for 4~20mA; Pulse, RS485, LCD display)

Signal output

None, Pulse,4~20mA, RS485


Mechanical pointer display, LCD display, No display only pulse signal output

Electrical interface

Aviation plug

Protection level


Explosion-proof level


NameModelThe material of the bodyGear materials
Cast IronLC-ACast ironCast iron
Cast SteelLC-ECast steelCast iron
Cast LightLC-QACast ironAluminum alloy
Cast iron high temperature typeLC-TACast ironCast iron
Cast steel high temperature typeLC-TECast steelCast iron
Cast steel high viscosity typeLC-NACast ironCast iron
Cast steel high viscosity typeLC-NECast steelCast iron
Stainless steelLC-BStainless steelStainless steel
Food stainless steelSPBStainless steelStainless steel
13 TypeLC-13Various materialsVarious materials

Extended reading: Stainless steel flow meters|304-316 optional

Oval Gear Flow Meter Flow Range

Nominal Diameter (mm) Flow   range(m3/h)
0.6~2mPa·s 2~8mPa·s 8~200mPa·s Chemical liquids
10 0.08~0.4 0.04~0.4 0.08~0.4
15 0.3~1.5 0.15~1.5 0.3~1.5
20 0.75~3 0.4~3 0.3~3 0.6~3
25 1.5~6 0.8~6 0.6~6 1.2~6
40 3~15 2~15 1.5~15 2.4~12
50 4.8~24 3~24 2.4~24 3.8~19
65 8~40 5~40 4~40 8~30
80 12~60 8~60 6~60
100 20~100 13~100 10~100
150 38~190 25~190 19~190
200 68~340 45~340 34~340

Note: Diameter and flow flange of Oval meters for class0.5

Read more about: what is gpm;

Nominal Diameter (mm) Flow   range(m3/h)
0.3~0.8mPa·s 0.8~2mPa·s 2~8mPa·s 8~200mpa.s
10 0.2~0.4 0.15~1.5 0.1~0.5 0.08~0.5
15 0.75~1.5 0.65~1.5 0.3~1.5 0.25~1.5
20 1.5~3 1~3 0.6~3 0.5~3
25 3~6 2~6 1.2~6 1~6
40 7.5~15 5~15 3~15 2.5~15
50 12~24 8~24 4.8~24 4~24
65 20~40 15~40 8~40 6.5~40
80 30~60 20~60 12~60 10~60
100 50~100 34~100 20~100 16~100
150 95~190 64~190 38~190 32~190
200 170~340 180~340 68~340 56~340

Note: Diameter and flow flange of Oval meters for class0.2

Extended reading: Cylinder Gear flow meter for micro flow measurement.

Pointer Type Oval Gear Flow Meter Applications

LC series oval gear flowmeter is equipped with on-site pointer display and word wheel cumulative counting device, which can directly display the cumulative flow of liquid flowing through the pipeline. For different liquids (acid, alkali, salt, organic solution, etc.), the flowmeter can be made of different materials (cast iron, cast steel, stainless steel, etc.). It is suitable for flow measurement in industrial sectors such as petroleum, chemical industry, transportation, commerce, food, medicine and health.

  • 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-Q cast iron oval gear flowmeter, whose rotor is made of aluminum, is suitable for the measurement of low-viscosity, low-corrosion (such as gasoline, etc.) 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.
  • The LC-L aluminum alloy oval gear flowmeter is a light super flowmeter, which is widely used in the measurement of low corrosive liquid media, such as water and other liquids.

Structure and working principle of Oval Gear Flow Meter

The oval gear flowmeter is composed of a metering box and a pair of elliptical gears installed in the metering box, and the upper and lower cover plates form a sealed crescent-shaped cavity (due to the rotation of the gear, it is not sealed) as the calculation unit of a displacement .

The flow meter is mainly composed of a housing, a counter, an elliptical gear, and a coupling (magnetic coupling and axial coupling), etc. As shown in the figure.

Structure and working principle of Oval Gear Flow Meter

1.Counter 2. Transmitter

3. Accuracy adjuster (used above DN50)

4. Sealed coupling

5. Front cover 6. Cover plate

7. Oval gear 8. Shell

9. Rear cover

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.

Read more about Mass Flow Rate vs Volumetric Flow Rate

Oval gear flow meter price

Sino-Inst is a manufacturer of oval gear flow meters. We try our best to provide customers with high-quality flow meters.
The price of elliptical flowmeter is relatively moderate.
If you need a quote for oval gear flow meters. Please contact our sales engineer.
To confirm the price of elliptical flowmeter, the following information needs to be confirmed:

  1. Name, model, specification, material.
  2. Medium temperature, pressure, flow range.
  3. Medium viscosity or name
  4. Are there any special requirements, such as explosion-proof.

The following is the reference price of one of our oval gear flow meters:
Cast iron material. DN100 national standard flange connection. Temperature: -20-80℃. Pressure: 1.6mpa. Measuring medium: diesel. Flow range: 15-100m3/h. Accuracy: 0.5%. The on-site pointer shows the cumulative flow, with zero return function. FOB price: USD 800-900.00

More Liquid Flow Meters:


What is oval gear flow meter?

Oval gear flow meters (also known as displacement flow meters, gear flow meters) are a type of positive displacement flow meters, which are the most accurate type of flow meters.
The oval gear flowmeter uses a mechanical measuring element to continuously divide the fluid into a single known volume part, and measures the total flow volume according to the number of times that the metering chamber is filled and discharged with the volume part of the fluid successively and repeatedly.
The Oval gear flow meter is especially suitable for the flow measurement of heavy oil, polyvinyl alcohol, resin and other high viscosity media.

What are the different types of flow meters?

For different working principle, We offer different types of flow meters, like:
Differential Pressure Flow Meters
Orifice Plate
Venturi Tube
Flow Nozzles
The Sonic Nozzle – Critical (Choked) Flow Nozzle
Calorimetric Flowmeter
Ultrasonic Doppler Flowmeter
Positive Displacement Flowmeter

Variable Area Flowmeter or Rotameter
Velocity Flowmeters
Pitot Tubes
Electromagnetic Flowmeter
Turbine Flowmeter
Vortex Flow Meter
Thermal Flowmeter
Coriolis Flowmeter
Mass Flowmeters
Open Channel Flowmeters

You may like:

Sino-Inst, Manufacuturer for Oval Gear Flow Meters. For example: crude oil flowmeter, diesel flowmeter, gasoline flowmeter.

Sino-Inst’s Oval Gear Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Pointer Oval Gear Flow Meter|Typical Volumetric Flowmeter

Oval gear flow meter is one of the typical positive displacement flow meters. Crude oil, diesel, gasoline, etc. flow measurement.

Product SKU: LC

Product Brand: Sino-Inst

Product Currency: USD

Product Price: 500

Price Valid Until: 2039-09-30

Product In-Stock: InStock

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