Oval Gear Flow Meter

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Oval Gear Flow Meter Manufacturer India – Fluido Sense

Introduction

Oval Gear Flow meters are the instruments, invented based on the positive displacement principle considering accuracy and precision as the core of their performance. These volumetric flow meters are best used in industries like oil and petroleum, chemicals, pharmaceuticals, general manufacturing industries where high level of accuracy and repeatability are required.

Operation Principal

Liquid Passes into the single case measuring chamber and displaces two oval gears. Each rotation of an oval gear is proportional to a discrete unit of volume. In turn, the speed at which the gears rotate is directly proportional to flow rate. Reed or Hall Effect sensors mounted outside the pressure boundary detect the movement of the ovalgears, thus allowing local or remote instruments to dis-

Areas of Applications

For all viscous, non-abrasive clean liquids like

Petroleum Products
Oil Products
Chemicals
Grease
Fuels
Pastes, etc.
Oval Gear Flow Meter Technical Diagram – Fluido Sense

Benefits

  • High Resolution Digital Output
  • Digital or Analogue Outputs available
  • Wide Range ability
  • Less slippage
  • Smoother and quieter
  • Bi-directional flow capability
  • Low Mass oval gears facilitate fast response
  • time to step changes in flow rate

Model FS04 FS06 FS08 FS12 FS20 FS25 FS40L FS50 FS80
Capacity Group Low Medium High
Normal Size ( Inch) 1/4" 1/4" 3/8" 1/2" 3/4" 1" 1.5" 2" 3"
Flow Range (LPH) 0.7 to 50 5 to 150 20 to 300 50 to 1200 150 to 2000 200 to 4000 500 to 10000 600 to 20000 1000 to 50000
Accuracy +/- 1 % of Reading +/- 0.5% of Reading (10:1 turndown)
Repeatibility Typically 0.03% of reading
Temperature Range 200C to 850 C (for Aluminium body) -200 C to 1200 C (for SS. Body) refer factory for lower and higher temperature ranges
Maximum Pressure (threaded meters) in bar
Aluminium Meters 25 bar
SS 316 meters 200 bar
High Pressure Model Refer Factory
Electrical for pulse meter
Output Hall Effect NPN/PNP Pulse
Pulse / Liter 5635 6000 1700 860 260 95 35 12 6
Optional outputs 4-20 mA, 485 Modbus communication
physical
Protection class IP66/67
Noise generation 75 db
Dimensions Refer datasheet

Oval Gear Flow Meter Technical Diagram – Fluido Sense
Model A B C D E F G H I
FS04 75 70.88 11.72 54.19 10.25 10.25 45.7 4.25 4.25
FS06 75 70.88 11.72 64 5.5 5.5 55.75 4.2 4.2
FS08 75 79 15.2 64.2 5.5 5.5 55.75 4.25 4.25
FS12 75 79 18.9 64.4 5.3 5.3 55.68 4.25 4.25
FS20 88 91 24.4 78 4.7 4.7 70 4.25 4.25
FS25 99.5 98 30.5 94 3 3 85.37 4.25 4.25
Oval Gear Flow Meter Technical Diagram – Fluido Sense
Model A B C D E F G H I
FS40 145 119 45 118.8 13 13 105.15 6.9 6.9
FS50 203 150.9 56 167 18 18 153 6.9 6.9
FS80 225 161 85 201.3 12.35 12.35 188 6.9 6.9

It is recommended that all "signal" cables are screened and run separately to power lines and switched inductive loads and are located well away from inverters and other "noisy" apparatus. Always use sound wiring practice. Both Hall effect and optical detectors (NPN) require a 10K Ohm external pull-up resistor connected between the output and a suitable power supply to attain a pulse. Typically the flowmeter PSU may be used but sometimes a dc pulse, which is of a different voltage, may be required e.g. using a PLC with a 24V PSU and an internal 5V rail for the pul-up

Hall Effect Sensor
Supply Voltage 5-30 VDC
Temp. Range 0-85 C
Draw Current (Max) 20mA
Oval Gear Flow Meter Technical Diagram – Fluido Sense

Model with Flow Range MOC Body Rotor Rotor Thread Output Electrical Connection
FS04=1/4" + 0.7-50 A=Alu A=Alu 1=NBR 1=BSP 1=Pulse C=Cable
FS06=1/4" + 5-150 S=S.S. S=S.S. 2=EPDM 2=NPT 2=Battery Operated Display M=M12 Connector
FS08=3/8" + 20-300 P=PPS 3=Viton 3=Flange 3=Analog + Pulse D=DIN
FS12=1/2" + 50-1200 4=Display with analog
FS20=3/4" + 150-2000 5=Display with Communication
FS25=1" + 200-4000
FS040L=1.5" + 500-10000
FS50=2" + 600-20000
FS80=3" + 1000-50000

FAQ's

An Oval Gear Flow Meter is a positive displacement flow meter that measures the flow of a liquid by passing it through a pair of oval-shaped gears. As the liquid flows, it causes the gears to rotate, and each rotation moves a fixed volume of fluid. The number of rotations is then converted into flow rate or total volume.

Oval Gear Flow Meters are ideal for measuring clean, viscous, and lubricating fluids such as oil, diesel, fuel, syrup, adhesives, and other chemical liquids. They are not suitable for fluids containing large particles or debris that may clog the gears.

Yes, calibration is recommended to maintain measurement accuracy. Factory calibration is usually provided, but periodic recalibration may be necessary, especially in critical applications or when switching between different types of fluids.

Yes, but it depends on the material of construction. For corrosive fluids, meters made from stainless steel, PFA-lined, or other chemical-resistant materials should be used. Always verify chemical compatibility with the manufacturer before use.

Yes, specially designed models with ATEX or IECEx certification can be used in hazardous environments. These meters are built with explosion-proof enclosures and non-sparking materials to ensure safe operation.

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