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The oil-free screw blower is trusted across diverse industries.It is particularly ideal for applications in sewage treatment,textiles,cement,chemicals,and power plants,where it delivers dependable performance while supporting sustainability goals and enhancing operational efficiency.
Product Parameters
| Oil-free Screw Blower BPM Series | ||||||
| Model | Power （kW） | Pressure（bar/kPa） | Volume flow（m³/min） | Pipe Diameter | Weight（kg） | Dimension (mm) |
| RK7.5BPM | 5.5 | 0.4/40 | 4.0 | DN150 | 700 | 1400×1100×1360 |
| 0.6/60 | 3.2 | |||||
| RK10BPM | 7.5 | 0.4/40 | 6.4 | DN150 | 750 | 1400×1100×1360 |
| 0.6/60 | 4.6 | |||||
| 0.8/80 | 3.5 | |||||
| RK15BPM | 11 | 0.4/40 | 9.0 | DN150 | 800 | 1400×1100×1360 |
| 0.6/60 | 7.5 | |||||
| 0.8/80 | 6.0 | |||||
| 1.0/100 | 4.8 | |||||
| 1.2/120 | 4.0 | |||||
| 1.5/150 | 2.8 | |||||
| RK20BPM | 15 | 0.4/40 | 13.6 | DN150 | 1200 | 2200×1250×1900 |
| 0.6/60 | 10.5 | DN150 | 800 | 1400×1100×1360 | ||
| 0.8/80 | 8.3 | |||||
| 1.0/100 | 6.7 | |||||
| 1.2/120 | 5.8 | |||||
| 1.5/150 | 4.5 | |||||
| RK25BPM | 18.5 | 0.4/40 | 16.2 | DN150 | 1250 | 2200×1250×1900 |
| 0.6/60 | 13.1 | |||||
| 0.8/80 | 10.3 | DN150 | 800 | 1400×1100×1360 | ||
| 1.0/100 | 9.2 | |||||
| 1.2/120 | 7.5 | |||||
| 1.5/150 | 6.0 | |||||
| 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 | 37kW | 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 | |||||
| RK60BPM | 45kW | 0.4/40 | 44.0 | DN200 | 1750 | 2700×1400×1900 |
| 0.5/50 | 42.0 | |||||
| 0.6/60 | 38.0 | |||||
| 0.8/80 | 33.5 | |||||
| 1.0/100 | 26.0 | DN150 | 1300 | 2200×1250×1900 | ||
| 1.2/120 | 21.0 | |||||
| 1.5/150 | 15.5 | |||||
| 1.7/170 | 12.7 | |||||
Technical Highlights
✔️ 100% Oil-Free (Class 0)
A combination of labyrinth seals and screw assembly ensures an oil-free compression chamber, delivering certified Class 0 air purity.
✔️ High Energy Efficiency
Using adiabatic compression, the blower achieves over 75% total efficiency—saving 20–35% more energy than traditional Roots blowers. Higher discharge pressure with lower pulsation ensures stable performance.
✔️ Quiet Operation
Designed to minimize aerodynamic noise, it features smooth airflow and optimized inlet/discharge ports for significantly quieter performance.
✔️ Intelligent Control
Built-in PLC supports remote operation and multiple languages, offering a user-friendly interface for enhanced convenience and efficiency.
✔️ Cost-Effective Installation
With a stable, foundation-free design, installation costs are reduced, delivering greater long-term value.
Typical Applications
1. Wastewater Treatment
Aeration: Supplies oxygen to aerobic bacteria in treatment basins, offering superior energy efficiency over Roots blowers.
Other Uses: Tank agitation, filter backwashing, biogas boosting.
2. Food & Beverage
Bottling: Purges containers before filling.
Fermentation & Mixing: Supplies oil-free air for yogurt production, brewing, and oxidation processes.
3. Pharmaceutical & Biotechnology
Bioreactors: Provides sterile, oil-free air for antibiotic, vaccine, and enzyme production.
Process Air: Used in fluid bed dryers, tablet coating, and material conveying of powders.
4. Power & Energy
Biogas/Landfill Gas Recovery: Compresses methane for power generation or grid injection.
Combustion Air: Supplies air for waste-to-energy plant combustion.
