Why Air Suspension High-Speed Centrifugal Blowers Are Replacing Roots Blowers

A New Way to Look at Industrial Air Supply

For many years, Roots blowers have been the “default choice” in industries like wastewater treatment, pneumatic conveying, and food processing. They are reliable, but they also come with problems: high power use, loud noise, oil maintenance, and frequent servicing.
Today, air suspension high-speed centrifugal blowers offer a smarter option. Instead of focusing only on purchase price, more users are looking at lifecycle cost, energy savings, and daily operation comfort. That’s where this technology really stands out.

What Makes This Technology Different?

Air Suspension Bearings: No Oil, No Contact

At the heart of the system are air suspension bearings. When the blower starts, a thin air film lifts the shaft, so there is no mechanical contact and no friction.
This means:

No lubrication oil

No oil filters or oil changes

Almost zero routine maintenance

For operators, this is a big relief. Less downtime, fewer spare parts, and a cleaner air supply.

High-Speed Direct Drive = Higher Efficiency

Unlike traditional Roots blowers, high-speed centrifugal blowers use a direct-drive motor. This design boosts efficiency by 30%–50%.
You get more air using less electricity, which directly lowers energy bills—especially in systems running 24/7.

Smart Energy Use with Variable Frequency Control

Wide VFD Range for Real Demand

These blowers support a 45%–100% variable frequency range, allowing airflow to match real system demand.
Instead of wasting energy at full load, the blower adjusts automatically. This “use only what you need” approach is one of the easiest ways to save power.

Quiet by Nature, Not by Insulation

Noise is another major concern in industrial plants. Air suspension blowers are naturally quiet.
At 1 meter distance, noise levels are usually below 80 dB, and the blower itself does not create vibration noise. This improves workplace comfort and reduces the need for extra soundproof rooms.

Compact Size, Flexible Installation

Space is expensive. Compared with the same-capacity Roots blower, an air suspension centrifugal blower can be about 50% smaller.
This compact design makes installation easier, especially in retrofit projects where space is limited.

Where Are These Blowers Commonly Used?

Wastewater Treatment Plants

Stable airflow, low noise, and high efficiency make them ideal for aeration systems.

Pneumatic Conveying Systems

Clean, oil-free air is perfect for powder and bulk material transport.

Food, Beverage, and Pharmaceutical Industries

Oil-free operation helps meet strict hygiene standards.

Electronics and Chemical Plants

Precise airflow control and low vibration protect sensitive processes.

Is It Time to Upgrade?

If you are still using traditional Roots blowers, it may be time to rethink your air supply system. Lower energy use, almost zero maintenance, quieter operation, and a smaller footprint all add up over time.

So here’s a question for you:
Would you rather keep fixing and maintaining old equipment, or invest in a blower that works quietly in the background while saving energy every day?

Air Suspension Centrifugal Blower information