GRF-SL Oil-Free Water-Injected Screw Compressors
Water instead of oil: single-screw oil-free family, 1.3–43 m³/min at 0.7/0.8/1.0 MPa. No oil anywhere in the compression chamber — 100% oil-free discharge for food, pharma and electronics.
GRF-SL Oil-Free Water-Injected Screw Compressors
Water instead of oil: single-screw oil-free family, 1.3–43 m³/min at 0.7/0.8/1.0 MPa. No oil anywhere in the compression chamber — 100% oil-free discharge for food, pharma and electronics.
Overview
Water performs lubrication, cooling, sealing and noise reduction at once; chamber temperature stays within 45 °C so compression approaches the ideal isothermal process, raising efficiency and air quality together. The single-screw airend pairs a cylindrical rotor with two symmetric gate rotors, fully balancing radial and axial forces for minimal bearing load and 50,000 h continuous life. Airend and water/air circuit are SUS304/316 stainless, with an automatic softener keeping discharge water within environmental limits.
Key features
Water lubrication; discharge meets WHO and GMP expectations.
Near-isothermal compression and symmetric gate rotors for high volumetric efficiency.
SUS304/316 airend and water circuit resist acid gas and moisture.
Force-balanced design, minimal bearing load, reliable continuous duty.
Model data
Models in this family
| Model | 0.7 MPa | 0.8 MPa | 1.0 MPa | Noise dB(A) | Motor (kW/HP) | Outlet | L×W×H (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| GRF-15SL | 1.65 | 1.5 | 1.3 | 60 | 11/15 | G3／4” | 1120×750×1000 | 300 |
| GRF-20SL | 2.5 | 2.3 | 2.1 | 60 | 15/20 | G3／4” | 1120×750×1000 | 300 |
| GRF-25SL | 3.1 | 2.8 | 2.5 | 61 | 18.5/25 | G1” | 1550×1000×1200 | 520 |
| GRF-30SL | 3.7 | 3.4 | 3.0 | 61 | 22/30 | G1” | 1550×1000×1200 | 560 |
| GRF-40SL | 5.2 | 4.7 | 4.3 | 64 | 30/40 | G1” | 1840×1020×1290 | 1050 |
| GRF-50SL | 6.1 | 5.6 | 5.0 | 64 | 37/50 | G1” | 1840×1020×1290 | 1050 |
| GRF-60SL | 7.5 | 6.8 | 6.0 | 66 | 45/60 | G2” | 1840×1020×1290 | 1100 |
| GRF-75SL | 10.0 | 9.0 | 7.8 | 66 | 55/75 | G2” | 2020×1420×1700 | 1610 |
| GRF-100SL | 13.0 | 12.0 | 10.0 | 70 | 75/100 | G2” | 2020×1420×1700 | 1880 |
| GRF-120SL | 15.5 | 14.0 | 12.5 | 70 | 90/125 | DN80 | 2180×1900×1880 | 2700 |
| GRF-150SL | 20.0 | 18.0 | 16.0 | 72 | 110/150 | DN80 | 2180×1900×1880 | 3100 |
| GRF-175SL | 25.0 | 23.0 | 20.0 | 72 | 132/180 | DN80 | 2800×1850×2000 | 3250 |
| GRF-220SL | 27.0 | 25.5 | 24.0 | 72 | 160/220 | DN100 | 2800×1850×2000 | 4500 |
| GRF-250SL | 30.0 | 28.0 | 25.0 | 74 | 185/250 | DN100 | 2800×1850×2000 | 4500 |
| GRF-300SL | 36.0 | 33.0 | 27.0 | 74 | 220/300 | DN100 | 2800×1850×2000 | 4500 |
| GRF-350SL | 43.0 | 41.0 | 38.0 | 74 | 250/350 | DN100 | 2800×1850×2000 | 4500 |
