250KW Direct-driven Water Cooling Oil-free Rotary Screw Compressor
The AIRERA 250kW direct-driven water-cooled oil-free rotary screw compressor is an energy-saving benchmark designed for high-standard industrial environments, ensuring 100% oil-free air that meets ISO Class 0 purity standards. Featuring an advanced direct-drive structure, this model completely eliminates transmission losses, while its high-efficiency water-cooling system ensures exceptional thermal stability and extended service life even under extreme heavy-duty conditions. Powered by AIRERA’s intelligent control system for precise regulation, this high-capacity unit significantly reduces operational energy consumption and provides a stable, zero-pollution power source for food and electronic manufacturing industries, making it the ideal choice for modern green factory upgrades.
Advantages of OGFD Air Screw Compressor:
- Patented High-Efficiency Compressor Block
- 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 OGFD-250 |
|---|---|---|
| Free air delivery | m³/min | 43.0-38.0 |
| 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 | ℃ | ≤45 |
| Inlet status - Pressure | MPa | Atmospheric pressure |
| Inlet status - Relative humidity | ≤90% | |
| Noise Level | dB(A) | ≤79 |
| Drive rotor speed | rpm | 2990 |
| Compressed air outlet temperature | ℃ | Ambient temperature＋15 |
| Compressed Inlet temp. | ℃ | 2-40 |
| 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 | Y2355L2-2 | |
| Motor - Speed | rpm | 2990 |
| Motor - Rated Power | KW | 250 |
| Motor - Service factor | 1.2 | |
| Motor - Protection type | IP55 | |
| Motor - Efficiency | IE3 | |
| Motor - Startup mode | ʏ-Δ starting | |
| Motor - Voltage | V | 380 |
| Motor - Frequency | Hz | 50 |
| Motor - Rated current | A | 558 |
| Motor - Weight of motor | kg | 1950 |
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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