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Oil-free screw blowers provide 100% oil-free low-pressure compressed air. Utilizing precision-machined screw components, the compression chamber is oil-free, providing clean and reliable airflow for industrial applications. The 22–37 kW power range offers a balanced solution for medium-sized operations requiring efficient, continuous low-pressure air supply.
Product Parameters
| Model | Power （kW） | Pressure（bar/kPa） | Volume flow（m³/min） | Pipe Diameter | Weight（kg） | Dimension (mm) |
| RK30BPM | 22 | 0.4/40 | 22.0 | DN150 | 1250 | 2200×1250×1900 |
| 0.5/50 | 19.0 | |||||
| 0.6/60 | 16.0 | |||||
| 0.7/70 | 14.5 | |||||
| 0.8/80 | 13.0 | |||||
| 1.0/100 | 9.5 | DN150 | 850 | 1400×1100×1360 | ||
| 1.2/120 | 8.8 | |||||
| 1.5/150 | 7.0 | |||||
| RK40BPM | 30 | 0.4/40 | 29.0 | DN200 | 1750 | 2700×1400×1900 |
| 0.6/60 | 26.0 | DN150 | 1250 | 2200×1250×1900 | ||
| 0.7/70 | 23.5 | |||||
| 0.8/80 | 21.5 | |||||
| 1.0/100 | 15.8 | |||||
| 1.2/120 | 12.5 | |||||
| 1.7/170 | 7.5 | DN150 | 800 | 1400×1100×1360 | ||
| RK50BPM | 37 | 0.4/40 | 38.0 | DN200 | 1750 | 2700×1400×1900 |
| 0.5/50 | 35.0 | |||||
| 0.6/60 | 32.0 | |||||
| 0.8/80 | 26.0 | DN150 | 1250 | 2200×1250×1900 | ||
| 1.0/100 | 21.5 | |||||
| 1.2/120 | 15.5 | |||||
| 1.5/150 | 12.5 |
Technical Advantages
100% Oil-Free Air
No oil contamination—ideal for sensitive processes where air purity is critical.
High Energy Efficiency
Advanced screw technology delivers up to 30% energy savings compared to traditional rotary lobe blowers.
Low Noise & Vibration
Smooth, quiet operation allows installation near work areas without disturbance.
Compact Footprint
Space-saving design integrates easily into existing systems or skid-mounted packages.
Continuous Duty
Built for 24/7 operation with robust components and minimal maintenance requirements.
Intelligent Control
PLC-based system with variable frequency drive (VFD) option for demand-based operation and optimized energy use.
Wastewater Treatment – Aeration in biological treatment processes.
Pneumatic Conveying – Transport of bulk materials like cement, powder, and granul
Aquaculture – Oxygenation and aeration in fish farms and shrimp ponds.
Cement & Mining – Aeration for silo fluidization and dust collection systems.
Textile Industry – Air supply for weaving and spinning machines.
Food & Beverage – Clean air for product handling, drying, and packaging
Pharmaceutical – Oil-free air for tablet coating, fermentation, and cleanroom applications.
FAQ
1. How do I select the right size of oil-free screw blower?
First, determine your required flow rate (m³/min or CFM) and pressure (kPa or bar) . Match these with the blower's performance curve. Oversizing wastes energy; undersizing leads to insufficient output.
2. What factors affect the actual output of the blower?
Inlet air temperature, altitude, and humidity all affect performance. Higher temperatures and altitudes reduce flow and efficiency—selection should account for site conditions, especially for outdoor or high-elevation installa3. Should I consider a Variable Frequency Drive (VFD) for my application?Yes, if your air demand fluctuates. A VFD allows the blower to adjust speed based on actual load, significantly reducing energy consumption during partial load conditions.
4. How do I compare oil-free screw blowers with traditional lobe blowers?
Focus on specific power (kW/m³/min) . Oil-free screw blowers typically offer 20–35% higher energy efficiency than lobe blowers at the same operating point, resulting in lower operating costs over the equipment lifespan.
Oil-free screw blowers provide 100% oil-free low-pressure compressed air. Utilizing precision-machined screw components, the compression chamber is oil-free, providing clean and reliable airflow for industrial applications. The 22–37 kW power range offers a balanced solution for medium-sized operations requiring efficient, continuous low-pressure air supply.
Product Parameters
| Model | Power （kW） | Pressure（bar/kPa） | Volume flow（m³/min） | Pipe Diameter | Weight（kg） | Dimension (mm) |
| RK30BPM | 22 | 0.4/40 | 22.0 | DN150 | 1250 | 2200×1250×1900 |
| 0.5/50 | 19.0 | |||||
| 0.6/60 | 16.0 | |||||
| 0.7/70 | 14.5 | |||||
| 0.8/80 | 13.0 | |||||
| 1.0/100 | 9.5 | DN150 | 850 | 1400×1100×1360 | ||
| 1.2/120 | 8.8 | |||||
| 1.5/150 | 7.0 | |||||
| RK40BPM | 30 | 0.4/40 | 29.0 | DN200 | 1750 | 2700×1400×1900 |
| 0.6/60 | 26.0 | DN150 | 1250 | 2200×1250×1900 | ||
| 0.7/70 | 23.5 | |||||
| 0.8/80 | 21.5 | |||||
| 1.0/100 | 15.8 | |||||
| 1.2/120 | 12.5 | |||||
| 1.7/170 | 7.5 | DN150 | 800 | 1400×1100×1360 | ||
| RK50BPM | 37 | 0.4/40 | 38.0 | DN200 | 1750 | 2700×1400×1900 |
| 0.5/50 | 35.0 | |||||
| 0.6/60 | 32.0 | |||||
| 0.8/80 | 26.0 | DN150 | 1250 | 2200×1250×1900 | ||
| 1.0/100 | 21.5 | |||||
| 1.2/120 | 15.5 | |||||
| 1.5/150 | 12.5 |
Technical Advantages
100% Oil-Free Air
No oil contamination—ideal for sensitive processes where air purity is critical.
High Energy Efficiency
Advanced screw technology delivers up to 30% energy savings compared to traditional rotary lobe blowers.
Low Noise & Vibration
Smooth, quiet operation allows installation near work areas without disturbance.
Compact Footprint
Space-saving design integrates easily into existing systems or skid-mounted packages.
Continuous Duty
Built for 24/7 operation with robust components and minimal maintenance requirements.
Intelligent Control
PLC-based system with variable frequency drive (VFD) option for demand-based operation and optimized energy use.
Wastewater Treatment – Aeration in biological treatment processes.
Pneumatic Conveying – Transport of bulk materials like cement, powder, and granul
Aquaculture – Oxygenation and aeration in fish farms and shrimp ponds.
Cement & Mining – Aeration for silo fluidization and dust collection systems.
Textile Industry – Air supply for weaving and spinning machines.
Food & Beverage – Clean air for product handling, drying, and packaging
Pharmaceutical – Oil-free air for tablet coating, fermentation, and cleanroom applications.
FAQ
1. How do I select the right size of oil-free screw blower?
First, determine your required flow rate (m³/min or CFM) and pressure (kPa or bar) . Match these with the blower's performance curve. Oversizing wastes energy; undersizing leads to insufficient output.
2. What factors affect the actual output of the blower?
Inlet air temperature, altitude, and humidity all affect performance. Higher temperatures and altitudes reduce flow and efficiency—selection should account for site conditions, especially for outdoor or high-elevation installa3. Should I consider a Variable Frequency Drive (VFD) for my application?Yes, if your air demand fluctuates. A VFD allows the blower to adjust speed based on actual load, significantly reducing energy consumption during partial load conditions.
4. How do I compare oil-free screw blowers with traditional lobe blowers?
Focus on specific power (kW/m³/min) . Oil-free screw blowers typically offer 20–35% higher energy efficiency than lobe blowers at the same operating point, resulting in lower operating costs over the equipment lifespan.
