Tokico FGBB631BDL 3/4-Inch Oil Flowmeter
The Tokico FGBB631BDL is an FGB-series positive displacement flowmeter for measuring oil volume in a 20 mm (3/4-inch) line. Choose a mechanical counter for straightforward local totalisation or an electronic indicator when a digital reading is required.
The FGB measuring unit uses gear-type PPS resin rotors. Confirm the oil, viscosity, operating flow, temperature and flow direction before ordering, especially when replacing an installed meter.
Choose your model
| Model | Indicator | Choose it for |
| FGBB631BDL-02X |
Mechanical seven-digit non-resettable totaliser |
A continuous accumulated-volume reading without resetting the counter. |
| FGBB631BDL-04X |
Mechanical seven-digit totaliser and five-digit resettable counter |
Reading an individual transfer or delivery while retaining the accumulated total. |
| FGBB631BDL-75XX |
Electronic indicator with digital flow and volume readings |
Local digital indication or matching an existing 75XX meter. Confirm signal-output and power requirements from the full supplied specification. |
Mechanical 02X and 04X specifications
| Item | FGBB631BDL-02X / FGBB631BDL-04X |
| Connection size |
20 mm (3/4 inch) |
| Flange |
JIS 10K FF |
| Accuracy |
±0.5% within the specified operating range |
| Kerosene flow range |
150–1,250 L/h at approximately 1.5 mPa·s |
| Diesel/light-oil flow range |
120–1,250 L/h at approximately 5 mPa·s |
| A heavy-oil flow range |
40–1,250 L/h at approximately 10 mPa·s or higher |
| B/C heavy-oil flow range |
20–1,250 L/h at approximately 50–300 mPa·s |
| Maximum working pressure |
0.98 MPa |
| Maximum fluid temperature |
80°C for kerosene and diesel/light oil; 120°C for applicable heavy oils |
| Body / rotor |
FCD400 ductile iron / PPS resin gear-type rotors |
| Standard flow direction |
Right to left |
| Face-to-face length |
170 mm |
| Approximate weight |
7 kg |
The ranges above are for the mechanical FGBB631BDL measuring unit under the stated reference viscosities. Check the actual operating viscosity and minimum flow before selection.
Electronic 75XX version
The FGBB631BDL-75XX belongs to Tokico’s electronic 75-series FGB range. The electronic indicator can show accumulated volume, reset volume and instantaneous flow. Tokico publishes ±0.5% accuracy, a maximum working pressure of 0.98 MPa and a JIS 10K FF connection for the electronic FGB family. The permitted flow range depends on the fluid and the exact meter configuration.
For a 75XX replacement, match the complete nameplate code and flow direction. Signal outputs, external power requirements and installation dimensions should be confirmed for the unit being supplied; do not use the mechanical 02X/04X counter or dimensional specifications as the 75XX specification.
Model selection
Select 02X, 04X or 75XX from the options above. For an existing installation, compare the full model code, indicator, flange, flow direction and operating conditions before ordering. For broader selection details, see the Tokico mechanical oil flowmeter guide and Tokico electronic oil flowmeter guide.