ROOTS FLO® 406 Rotary Positive Displacement Blower
The ROOTS FLO® 406 rotary blower is built to deliver reliable airflow performance for pneumatic conveying systems handling grain and other bulk materials. Designed with a rugged cast-iron body and dynamically balanced impellers, this rotary positive displacement blower relies on carburized-steel spur timing gears to maintain synchronized rotation across a 600 CFM flow range. Built for severe industrial duty, this 275-pound unit incorporates hardened cast-iron shaft sleeves and rigid ASTM class 30B headplates. Viton lip seals combine with standard piston rings to secure the oil reservoirs, ensuring leak-free bulk material handling during continuous operation.
Technical Details
Roots FLO 406 Design and Features
Warranty Information
Impellers
The blower uses dynamically balanced ductile iron impellers with integral shafts manufactured to ASTM 536 Class 60-45-12 and 80-60-3 standards for dependable strength under demanding operating conditions. Precision-engineered impeller geometry helps maintain efficient airflow and smoother blower performance during continuous use.
Bearings
Heavy-duty cylindrical roller bearings are designed to support higher load capacities and extended operating life. The drive shaft bearing system provides improved durability during high-speed operation compared to conventional ball-bearing designs.
Gears
Spur timing gears are manufactured from SAE 8620 alloy steel and heat-treated to 58–62 RC hardness for reliable long-term operation. The gear design supports smooth rotor timing while minimizing harmful thrust loads during continuous service.
Seals
Piston ring-style air seals help reduce internal leakage and maintain operating efficiency. Viton lip seals at the bearing and drive shaft locations are designed for dependable sealing performance in severe duty industrial environments.