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55–75 kW oil-free screw blower is a rotary positive displacement blower that delivers 100% oil-free compressed air or gas. Unlike traditional oil-injected rotary screw compressors, this blower uses advanced air-end coatings and precision clearances instead of oil for sealing and cooling, ensuring that the discharged air contains zero oil contamination. It is designed for continuous industrial duty, offering high efficiency, low noise, and reliable performance in the medium-power range.
| Oil-free Screw Blower BPM Series | ||||||
| Model | Power （kW） | Pressure（bar/kPa） | Volume flow（m³/min） | Pipe Diameter | Weight（kg） | Dimension (mm) |
| RK75BPM | 55kW | 0.4/40 | 55.0 | DN200 | 1800 | 2700×1400×1900 |
| 0.6/60 | 48.0 | |||||
| 0.7/70 | 44.0 | |||||
| 0.8/80 | 41.5 | |||||
| 1.0/100 | 35.0 | 1750 | ||||
| 1.2/120 | 31.0 | |||||
| 1.5/150 | 21.0 | DN150 | 1350 | 2200×1250×1900 | ||
| 1.8/180 | 16.5 | |||||
| 2.0/200 | 14.5 | |||||
| RK100BPM | 75kW | 0.4/40 | 78.0 | DN250 | 2200 | 3100×1500×2150 |
| 0.6/60 | 68.0 | |||||
| 0.7/70 | 61.0 | |||||
| 0.8/80 | 55.0 | DN200 | 1800 | 2700×1400×1900 | ||
| 0.9/90 | 51.0 | |||||
| 1.0/100 | 47.0 | |||||
| 1.2/120 | 42.5 | |||||
| 1.5/150 | 34.0 | 1750 | ||||
| 1.8/180 | 27.0 | |||||
| 2.0/200 | 24.5 | DN150 | 1400 | 2200×1250×1900 | ||
1. 100% Oil-Free Air
Certified to ISO 8573-1 Class 0, the blower guarantees no oil carryover—critical for sensitive applications such as food processing, pharmaceuticals, and electronics manufacturing.
2. Energy Efficiency
With integrated variable frequency drive (VFD) technology, the blower automatically adjusts motor speed to match demand, reducing energy consumption by up to 30–50% compared to fixed-speed alternatives.
3. Low Noise Operation
Advanced enclosure design and precision screw profiles keep noise levels as low as 75–80 dB(A), making it suitable for installation near work areas without requiring extensive soundproofing.
4. High Reliability & Low Maintenance
No oil separator or oil filters means fewer consumables. Routine maintenance is limited to air filter and bearing checks, minimizing downtime and operating costs.
5. Compact Footprint
Integrated design combines blower, motor, VFD, and cooling system in a single, space-saving enclosure—ideal for retrofitting into existing facilities.
Applications
Wastewater Treatment – Provides reliable aeration for biological treatment processes, improving oxygen transfer efficiency and reducing energy use.
Pneumatic Conveying – Transports powders and granules in food, chemical, and plastic industries without risk of oil contamination.
Food & Beverage Production – Delivers clean, oil-free air for product contact, packaging, and fermentation processes.
Pharmaceutical Manufacturing – Meets strict purity standards for tablet coating, fermentation, and cleanroom air supply.
Textile Industry – Powers air jet looms with consistent, oil-free compressed air to prevent fabric staining.
Electronics & Semiconductor – Provides ultra-clean air for precision assembly and handling sensitive components.
