250KW VSD Direct-driven Water Cooling Oil-free Rotary Screw Compressor
Designed for the apex of industrial performance, the AIRERA 250kW oil-free rotary screw compressor delivers 100% Class 0 certified pure, contaminant-free air, safeguarding sensitive operations in medical, food processing, and semiconductor manufacturing. By combining advanced VSD technology with an integrated direct-driven setup, this powerful unit eliminates transmission losses and slashes energy consumption by up to 35%, while its heavy-duty water-cooling system ensures exceptional thermal stability and uninterrupted reliability under continuous full-load conditions, offering a green, highly efficient, and low-maintenance power solution for forward-thinking enterprises.
Advantages of OGFD Air Screw Compressor:
- Constant Voltage and Power Saving

- Relief valve
The independently designed unloading valve (Patent No.: ZL200520058468.2), specifically engineered for vortex characteristics, enables fully sealed operation in screw compressors, ensuring stepless air delivery from 0 to 100%.
- Water cooler
The plates are made of special 304L stainless steel, offering corrosion resistance and high thermal efficiency, which reduces pressure and temperature differentials and ensures the system operates under near-isothermal compression. The system features a compact design, requires less cooling water, minimizes pressure loss, enhances durability, and is easy to clean and maintain.
| ITEM | UNIT | MODEL OGWD-250D A/B/CVP |
|---|---|---|
| Free air delivery | m³/min | 25.8-43.0|24.6-41.0|22.8-38.0 |
| Max. working pressure | MPa | 0.7-1.0 |
| Compressor type | Oil-free screw compressor | |
| Cooling type | Wate cooling | |
| Driven type | Direct driven | |
| Inlet status - Temperature | ℃ | 2-40 |
| Inlet status - Pressure | MPa | Atmospheric pressure |
| Inlet status - Relative humidity | ≤90% | |
| Noise Level | dB(A) | ≤79 |
| Drive rotor speed | rpm | 3000 |
| Compressed air outlet temperature | ℃ | Ambient temperature+15 |
| Cooling water flow | m3/min | 640 |
| Control mode | Intelligent controller | |
| Safety valve set pressure | MPa | 0.77 ~ 1.10 |
| Lubricating water volume | L | 480 |
| Compressed air outlet connection | DN100 | |
| Dimension - L | mm | 3320 |
| Dimension - W | mm | 1850 |
| Dimension - H | mm | 1850 |
| Net Weight | kg | 5200 |
| Motor - Model | TYCP315L-8 | |
| Motor - Speed | rpm | 3000 |
| Motor - Rated Power | KW | 250 |
| Motor - Service factor | 1.2 | |
| Motor - Protection type | IP55 | |
| Motor - Efficiency | IE5 | |
| Motor - Startup mode | Frequency conversion starting | |
| Motor - Voltage | V | 400(Special on request) |
| Motor - Frequency | Hz | 50-200(Special on request) |
| Motor - Rated current | A | 435 |
| Motor - Weight of motor | kg | 1230 |

The model offers optional VFD soft-start technology, ensuring a smooth startup current without impacting the facility's power grid. This protects electrical components and avoids peak-demand penalties or voltage fluctuations caused by high startup inrush.
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