There are many types of blowers on the market—when choosing the right one, you may have heard the saying “small screw, big centrifugal.” In other words, centrifugal blowers perform better in high-flow applications, whereas screw blowers are more efficient in low to medium flow ranges.
In practical terms, we typically define blower flow rates as follows:
- Low flow: ≤ 100 m³/min
- High flow: ≥ 250 m³/min
The lower the specific power (kW per m³/min), the better the blower’s performance. Based on the flow rate versus specific power curve, we can see that—ignoring other influencing factors:
- In the low flow range, screw blowers outperform centrifugal blowers in efficiency.
- In the medium flow range, performance is comparable.
- In the high flow range, centrifugal blowers take the lead in efficiency.
Of course, real-world operations are far more dynamic than a single working point. It’s not just about energy consumption at one flow level. That’s why we compare the overall performance and characteristics of screw vs. centrifugal blowers in the following table:
| Feature | Screw Blower | Centrifugal Blower |
|---|---|---|
| Flow Rate Adaptability | Strong | Medium |
| Efficiency (Low–Medium Flow) | Higher | Lower |
| Efficiency (High Flow) | Medium | Higher |
| System Complexity | Simple | Complex |
| Maintenance | Easy | Relatively Difficult |
| Component Universality | High | Low |
| Footprint | Compact | Larger |
| Initial Investment | Moderate | Higher |
Why Choose a Screw Blower?
Screw blowers are well-suited for a wide range of industrial applications, especially where low to medium flow rates are required. Their modular structure, ease of maintenance, and energy-efficient performance make them a cost-effective and reliable choice.
Introducing the New-Generation ZS5 Oil-Free Screw Blower
The latest ZS5 oil-free screw blower from Atlas Copco sets a new standard in efficiency, size, and performance.
🔧 What’s New with the ZS5?
- Up to 20% more energy-efficient compared to the previous generation
- Up to 30% higher flow capacity in its optimal flow range
- 15% smaller footprint, saving valuable floor space
- Fully oil-free Class 0 certified – ideal for sensitive industries like wastewater treatment, food & beverage, and electronics
Whether you’re focused on reducing operating costs or improving environmental sustainability, the ZS5 delivers uncompromising performance with smarter energy use.
(Images and data source: Atlas Copco. Content provided for informational and educational purposes only. Please contact for content removal if necessary.)
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