Types of Roots Blowers Used in Industry

Types of Roots Blowers Used in Industry

Roots blowers, also known as positive displacement blowers or lobe blowers, are widely used across industries to deliver a constant flow of air or gas at varying pressures. They are essential for aeration, pneumatic conveying, combustion, and vacuum applications. Below are the main types of roots blowers used in industrial systems.

1. Two-Lobe Roots Blower

The two-lobe roots blower is the conventional design that uses two figure-8 shaped rotors rotating in opposite directions. It is simple, durable, and suitable for low to medium pressure applications.

Applications: Wastewater treatment aeration, pneumatic conveying, combustion air supply, and aquaculture systems.

2. Three-Lobe Roots Blower

This modern design includes three lobes instead of two, reducing pulsation, vibration, and noise. It also improves air delivery smoothness and efficiency, making it the most commonly used type in industrial plants.

Applications: Wastewater treatment plants (WWTP), cement conveying systems, power plant desulfurization, and vacuum systems.

3. Water-Cooled Roots Blower

In this type, the casing is equipped with a water-cooling jacket to control temperature during continuous high-pressure operation. It is ideal for processes that generate significant heat or involve hot gas flow.

Applications: Furnace air supply, power generation, and high-pressure pneumatic conveying.

4. Vertical Type Roots Blower

The vertical roots blower has a compact design with vertically arranged inlet and outlet ports, making it suitable for limited installation space. It delivers stable performance and easy maintenance access.

Applications: Industrial vacuum systems and compact wastewater treatment facilities.

5. Roots Vacuum Blower (Exhauster)

Roots vacuum blowers are designed to operate as vacuum pumps rather than pressure blowers. They generate high flow at a low vacuum, ideal for gas suction and recovery systems.

Applications: Vacuum conveying, gas recovery, drying systems, and industrial suction processes.

6. Oil-Free Roots Blower

The oil-free design isolates the air chamber from the lubricated gearbox, ensuring 100% clean and oil-free air delivery. This type is essential for industries where air purity is critical.

Applications: Food processing, pharmaceuticals, and electronics manufacturing.

7. Gas-Specific Roots Blowers

Specialized roots blowers are built for handling gases like biogas, hydrogen, or methane. They use corrosion-resistant materials and gas-tight designs for safety and durability.

Applications: Biogas plants, chemical and petrochemical facilities, and power generation systems.

Conclusion

Choosing the right type of roots blower depends on the required pressure, flow rate, and type of gas. Each model offers unique advantages suited to specific industrial processes. Proper maintenance and selection ensure reliability and efficiency in long-term operation.

For professional repair, service, or replacement of industrial roots blowers, contact KH Venture Electrical today.