Tokico FGB FRO FRP Positive Displacement Oil Flow Meter

The Tokico FGB, FRO and FRP are high-accuracy mechanical positive displacement flow meters for measuring diesel, kerosene, fuel oil, heavy oil, crude palm oil and other compatible industrial liquids.

Available in sizes from 15 to 100 mm, these durable Tokico flow meters provide direct mechanical totalisation, accuracy within ±0.5% and flow capacities ranging from small-volume fuel consumption to large oil-transfer applications.

Tokico Positive Displacement Oil Flow Meter

The Tokico FGB, FRO and FRP positive displacement flow meters provide accurate mechanical measurement and totalisation of diesel, kerosene, fuel oil, heavy oil, crude palm oil and other compatible industrial liquids.

The liquid volume is measured directly using precision gear or Roots-type rotors. This positive displacement measurement principle delivers dependable accuracy across a broad flow range without requiring an electrical power supply for the standard mechanical counter.

Different meter sizes, rotor materials and temperature configurations are available. Final model selection should be based on the liquid type, viscosity, operating temperature, pressure, connection size and required flow range.

Why Choose a Tokico Flow Meter?

  • High Measurement Accuracy
    Standard measurement accuracy is within ±0.5% of the measured quantity. Selected configurations may be available with accuracy up to ±0.2%.
  • Direct Volumetric Measurement
    The positive displacement measuring principle divides the flowing liquid into fixed volumes for accurate flow measurement and totalisation.
  • Long-Term Measurement Stability
    The non-contact rotation of the Roots-type rotors reduces mechanical wear and helps preserve measurement accuracy throughout extended operation.
  • Low Pressure Loss
    Non-contact rotor operation produces lower pressure loss than many conventional displacement-type flow meters.
  • Mechanical Operation
    The standard local totalising counter operates without an external electrical power supply.
  • Durable Industrial Construction
    Cast-iron or ductile-iron bodies and application-specific rotor materials support dependable measurement in demanding oil-handling systems.

Tokico FGB, FRO and FRP Model Overview

ModelNominal SizeGeneral Flow RangeMeasuring MechanismTypical Application
FGB 15–25 mm
1/2–1 inch		 20–3,000 L/h Resin gear-type rotors Small-volume fuel consumption and oil measurement
FRO 40–50 mm
1½–2 inch		 0.1–15 m³/h Aluminium-alloy Roots rotors Medium-volume fuel and oil transfer
FRP 80–100 mm
3–4 inch		 0.6–130 m³/h Heavy-duty Roots rotors Bulk transfer and large-volume oil measurement

General Technical Specifications

SpecificationFGB TypeFRO TypeFRP Type
Measurement principle Positive displacement gear Positive displacement Roots rotor Positive displacement Roots rotor
Accuracy ±0.5% ±0.5% or ±0.2%, depending on configuration ±0.5% or ±0.2%, depending on configuration
General flow range 20–3,000 L/h 0.1–15 m³/h 0.6–130 m³/h
Maximum working pressure 0.98 MPa 1 MPa Up to 2.5 MPa, depending on construction
Hydraulic test pressure 1.96 MPa 2 MPa Up to 3.75 MPa, depending on construction
Standard flow direction Right to left Right to left Right to left
Standard counter Mechanical totalising counter Mechanical totalising counter Mechanical totalising counter
Reset counter option Available Available Available

Body and Rotor Materials

ModelMeter SizeBody MaterialRotor Material
FGB 15 mm / 1/2 inch FC250 cast iron Phenolic resin
FGB 20–25 mm / 3/4–1 inch FCD400 ductile iron PPS resin
FRO 40–50 mm / 1½–2 inch FC250 cast iron ADC12 aluminium-alloy die casting
FRP 80–100 mm / 3–4 inch FC250 cast iron or selected cast-steel construction Cast iron or aluminium alloy, depending on model

Maximum Working Temperature

ModelApplicable LiquidMaximum Working Temperature
FGB 15 mm Kerosene, diesel, light oil and A heavy oil 80 °C
FGB 20–25 mm Kerosene, diesel and light oil 80 °C
FGB 20–25 mm A, B and C heavy oil 120 °C
FRO Kerosene, diesel and light oil 50 °C
FRO A, B and C heavy oil 100 °C
FRP Gasoline, kerosene, diesel and light oil 50 °C
FRP A, B and C heavy oil 100 °C
FRP with cooling fin Compatible high-temperature oil Up to 150 °C

FGB Mechanical Counter Models

Nominal SizeTotalising CounterTotalising and Reset CounterCounter Digits
15 mm / 1/2 inch FGBB423BAL-02X FGBB423BAL-04X 7-digit totaliser and optional 5-digit reset counter
20 mm / 3/4 inch FGBB631BDL-02X FGBB631BDL-04X 7-digit totaliser and optional 5-digit reset counter
25 mm / 1 inch FGBB835BDL-02X FGBB835BDL-04X 7-digit totaliser and optional 5-digit reset counter

FRO Mechanical Counter Models

Nominal SizeTotalising CounterTotalising and Reset CounterCounter Digits
40 mm / 1½ inch FRO0438-02X FRO0438-04X 7-digit totaliser and optional 5-digit reset counter
50 mm / 2 inch FRO0541-02X FRO0541-04X 7-digit totaliser and optional 5-digit reset counter

FRP Mechanical Counter Models

Nominal SizeRepresentative ModelCounter TypeCounter Digits
80 mm / 3 inch FRP0845BAA-04X2-X Direct-reading totaliser with reset counter 7-digit totaliser and 5-digit reset counter
80 mm / 3 inch FRP0847BAA-04X2-X Direct-reading totaliser with reset counter 7-digit totaliser and 5-digit reset counter
100 mm / 4 inch FRP1051BAA-04X2-X Direct-reading totaliser with reset counter 7-digit totaliser and 5-digit reset counter
100 mm / 4 inch FRP1052BAA-04X2-X Direct-reading totaliser with reset counter 7-digit totaliser and 5-digit reset counter

Counter and Pulse-Transmitter Options

OptionFGB TypeFRO TypeFRP Type
Totalising counter 7 digits 7 digits 7 digits
Reset counter 5 digits 5 digits 5 digits
Electrical transmitter Reed-switch option Microswitch option Non-contact, reed-switch or microswitch options
Maximum pulse frequency Up to 10 Hz, depending on configuration Up to 5 Hz, depending on configuration Depends on the selected transmitter unit
Output ON/OFF contact pulse ON/OFF contact pulse Pulse output according to selected transmitter
Cable Two-core shielded cable Two-core shielded cable According to selected transmitter configuration

Flow Range Selection

The exact measuring range depends on the nominal meter size, liquid viscosity and whether operation is continuous or intermittent. Increasing liquid viscosity generally allows measurement at a lower flow rate, while the permissible maximum continuous flow may be lower than the intermittent maximum flow.

ModelNominal SizeGeneral Measuring CapacitySuitable Duty
FGB 15 mm Small-volume measurement within the FGB range Burners, small generators and machinery
FGB 20 mm Intermediate capacity within the FGB range Fuel-consumption monitoring and small transfer systems
FGB 25 mm Up to approximately 3,000 L/h Generators, boilers and fuel-transfer systems
FRO 40 mm Medium-volume measurement within the FRO range Boiler fuel and industrial oil systems
FRO 50 mm Up to approximately 15 m³/h Oil transfer, loading and consumption monitoring
FRP 80 mm Large-volume measurement within the FRP range Bulk oil transfer and palm-oil processing
FRP 100 mm Up to approximately 130 m³/h Terminals, storage facilities and large transfer systems

For accurate selection, refer to the product catalogue and provide Seacom with the minimum, normal and maximum flow rates together with the liquid viscosity and temperature.

Suitable Liquids and Applications

  • Diesel and Light Fuel Oil
    Consumption and transfer measurement for generators, boilers, burners and industrial machinery.
  • Kerosene and Petroleum Products
    Accurate mechanical totalisation in storage, transfer and distribution systems.
  • Heavy Fuel Oil
    Measurement of heated or higher-viscosity oils using a properly selected flowmeter configuration.
  • Crude Palm Oil
    Transfer and totalisation of CPO and compatible palm-oil products, subject to operating temperature and viscosity.
  • Boiler Fuel Monitoring
    Measure fuel consumption for operational monitoring, cost allocation and energy-management programmes.
  • Generator Fuel Consumption
    Monitor diesel consumption for standby generators, power plants and industrial generating equipment.
  • Tank Transfer and Loading
    Measure total liquid volume transferred between storage tanks, process equipment and delivery systems.
  • Palm-Oil Processing
    Measure CPO and compatible palm-oil products in transfer, storage and production processes.

Recommended Installation Arrangement

  • Install a Strainer Upstream
    A properly sized strainer helps prevent foreign particles from entering and damaging the measuring chamber.
  • Confirm the Flow Direction
    Install the meter according to the flow-direction arrow shown on the meter body.
  • Keep the Pipeline Full
    The measuring chamber should remain completely filled with liquid during operation.
  • Remove Air and Gas
    Entrained air or gas can cause measurement errors. An air eliminator may be required for certain installations.
  • Avoid Sudden Flow Surges
    Open valves gradually to protect the rotor mechanism from hydraulic shock and excessive overspeed.
  • Provide a Bypass
    A bypass arrangement allows the flowmeter and strainer to be isolated for inspection, servicing or calibration.

Mechanical and Electronic Versions

The FGB, FRO and FRP models on this page use mechanical totalising counters. This configuration is suitable when a clear local reading and operation without an external power supply are required.

For an LCD display, pulse output, analogue output or alarm output, consider the Tokico FRL and FRY electronic positive displacement flow meters.

Information Required for Model Selection

  • Measured Liquid
    Specify diesel, kerosene, heavy oil, crude palm oil or another liquid.
  • Minimum, Normal and Maximum Flow
    Provide all three flow conditions so the meter is not oversized or undersized.
  • Liquid Viscosity
    Flow range and meter performance vary according to viscosity.
  • Operating Temperature
    Confirm both the normal and maximum liquid temperatures.
  • Operating Pressure
    State the normal pressure, maximum pressure and required flange rating.
  • Pipe Connection
    Confirm the nominal pipe size, flange standard and required installation orientation.
  • Required Counter
    Specify whether a non-resettable totaliser or a totaliser with reset counter is required.
  • Required Output
    Specify whether a mechanical counter, contact pulse, electronic display or analogue output is needed.
  • Required Calibration
    State whether a calibration certificate or accredited calibration service is required.

Tokico Flow Meter Supplier in Malaysia

Seacom Process Instruments supplies Tokico flow meters in Malaysia for diesel, kerosene, fuel oil, heavy oil, crude palm oil and compatible industrial liquid applications.

Available services include application review, model selection, replacement-meter matching and accredited flowmeter calibration. Common Tokico mechanical flowmeter sizes and compatible strainers from 1/2 to 4 inches are also available, subject to stock.

Contact Seacom with your liquid type, viscosity, temperature, pressure, connection size and flow range so that the correct Tokico FGB, FRO or FRP configuration can be selected.

Download

  FGB/FRP/FRO catalogue - Oil, Diesel, Crude Palm Oil (CPO) Positive Displacement Flowmeter FGB/FRP/FRO (1.35M)

Specific References

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Oval gear flowmeters are categorised as positive displacement flow technology. When liquid flows through this type of positive displacement flowmeter, two oval geared rotors measure a constant volume per rotation within a precisely machined measuring chamber.

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