Exploring Air Compressors: Scroll Compressors
Part three of our “Exploring Air Compressors” series focuses on Scroll Compressors. Check out the other articles in this series about reciprocating piston compressors and rotary screw compressors.
Scroll Compressors
How does a scroll compressor work?
In a scroll compressor, two spiral elements come together to compress air. The one element remains stationary as the other moves in small circles inside the first element. Because of the movement of the spirals, air becomes trapped in the small air pockets. The rotation of the spiral pushes the air towards the center. As the air moves inward and the spiral continues to circle, smaller and smaller air pockets form, compressing the air. The center of the scroll has a pressure outlet, where the now compressed air travels to the rest of the system. The image to the right demonstrates the spirals’ movement.
What applications should use this?
One great benefit of scroll compressors is that they are 100% oil-free. The spirals never touch during the compression process and as a result do not require lubrication. Any process that needs oil-free air could benefit from a scroll compressor. Industries like food and beverage and pharmaceutical often require clean air for the safety of their processes.
Since scroll compressors are designed with few overlapping parts, they are generally very quiet machines, making them good matches for facilities with noise concerns. Additional benefits to this design of minimal movement are a relatively strong energy efficiency and low maintenance needs. Still, service checks are recommended on at least an annual basis. Depending on a facility’s needs, these benefits could be strong purchasing considerations.
What are examples of scroll compressors?
As with all compressors, process specs such as pressure, flow rate, and electrical service are key components to help decide which model is best. However, scroll compressors tend to be produce smaller flow rates. CASCO USA distributes:
- Anest Iwata (10-40 Hp)
- Powerex
Think a scroll compressor is the best option for you? Discuss details with our engineers.