

RATIO CONTROLLER
UL Listed wafer-style ratio controller designed for accurate foam concentrate proportioning across a wide range of flow rates and pressures. Operating on the venturi principle, the Ratio Controller introduces foam concentrate into the water stream by creating a low-pressure zone at the inlet nozzle, automatically adjusting concentrate flow as system demand varies.
Compatible with Bladder Tank Proportioning Systems, Inline Balance Proportioning Systems, and Skid Mounted Pump Balance Proportioning Systems, the FGRC series offers a reliable and passive proportioning solution with no moving parts requiring external power.
Key Specs:
- Models: FGRC-B (Bronze) | FGRC-S (Stainless Steel)
- Sizes: 65NB, 80NB, 100NB, 150NB
- Operating Pressure: 2.1 to 12 Bar
- Max Service Pressure: 14 Bar (200 PSI)
- Factory Hydro Test: 25 Kg/sq.cm (350 PSI)
- Mounting: Between ANSI B16.5 – 150# flanges
- Finish: Red RAL 3000 or Natural Finish
- Approval: UL Listed
Flow Range (AFFF 3%):
| Size | AFFF 3% (LPM) | AR-AFFF 3/3% (LPM) |
|---|---|---|
| 65NB (2½”) | 100 to 1,550 | 380 to 500 |
| 80NB (3″) | 260 to 3,000 | 680 to 2,900 |
| 100NB (4″) | 650 to 6,000 | 1,400 to 5,800 |
| 150NB (6″) | 1,200 to 12,000 | 2,750 to 11,600 |
Requires a minimum of five pipe diameters of straight unobstructed pipe upstream and downstream. Flow range quoted for AFFF 3% — contact us for other foam concentrate types.
Documents and Resources
- Size Guide
- Reviews (0)

| size | chest(in.) | waist(in.) | hips(in.) |
|---|---|---|---|
| XS | 34-36 | 27-29 | 34.5-36.5 |
| S | 36-38 | 29-31 | 36.5-38.5 |
| M | 38-40 | 31-33 | 38.5-40.5 |
| L | 40-42 | 33-36 | 40.5-43.5 |
| XL | 42-45 | 36-40 | 43.5-47.5 |
| XXL | 45-48 | 40-44 | 47.5-51.5 |





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