Compressors exist in all shapes and sizes. MARK offers a wide range of different compressors, fit for every task. What is a rotary-screw compressor and how does it work? What types are there? And is it the compressor I need for my business? Find out everything you need to know to choose your ideal air compressor in this article.
A screw compressor—also called a rotary screw compressor—is a type of positive displacement compressor that uses rotating elements to compress air or gas. These units are typically more robust and capable of higher airflow than piston compressors, making them ideal for industrial operations that demand consistent performance.
If you're wondering what is true for screw compressor systems, one key point is that they offer continuous duty operation. Unlike piston compressors, which require breaks to avoid overheating, screw compressors can run non-stop, making them a reliable solution for start-ups, expanding businesses, and large-scale manufacturing environments.
Screw Compressor Working Principle
The working principle of rotary screw air compressor technology is based on two interlocking rotors—one male and one female—that rotate in opposite directions. As the rotors turn, the space between them decreases, compressing the trapped air and pushing it through the outlet.
Because there are no valves and minimal internal friction, screw compressor working systems can operate at higher flow rates and with greater efficiency compared to piston compressors.
Types of Rotary Screw Compressors
There are several variations of rotary screw compressors, each designed for different operational needs:
Belt-drive: Uses a belt to link the motor and compressor element.
Gear-drive: Employs gears instead of belts, improving energy transfer and reducing wear.
Variable Speed Drive (VSD): Adjusts motor speed to match the actual air demand, improving energy efficiency and lowering operating costs.
There is a big difference between the different types of compressors. A few benefits of rotary screw compressors:
- Continuous airflow: Operates without the need for cooling breaks, maintaining a steady output.
- High capacity: Handles larger air volumes over long periods without overheating.
- Energy-efficient: Low internal heat makes them ideal for long-term savings.
- Long lifespan: Minimal wear and simple maintenance contribute to long equipment life.
- Low noise: Rotor contact is minimised, resulting in quieter operation.
Screw compressors are often the logical next step for businesses outgrowing the capacity of piston compressors. Thanks to their ability to provide continuous, high-volume airflow, they’re widely used in:
- Food and beverage processing
- Packaging operations
- Automotive workshops
- Automated production environments
In short, any application needing a constant, reliable air supply can benefit from screw compressor technology.
What air compressor do I need?
If you’re still not sure what type of air compressor you need, feel free to get in touch with our experts for personal advice. We’ll assess your situation and help you find the perfect compressor.
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