ROOTS FLO® 404 Rotary Positive Displacement Blower
The ROOTS FLO® 404 rotary blower is engineered for dependable pneumatic conveying applications where steady airflow and long operating life matter most. Built for grain handling and similar bulk material systems, this compact rotary positive displacement blower delivers airflow up to 392 CFM with reliable pressure and vacuum performance. Its rugged cast iron construction, precision-balanced impellers, and heavy-duty bearing system help maintain smooth operation even under continuous industrial workloads. Oversized oil reservoirs feed an advanced splash lubrication system, while extra-capacity cylindrical roller bearings easily withstand heavy V-belt pull during heavy industrial operations.
Technical Details
Roots FLO 404 Design and Features
Warranty Information
Impellers
Machined and dynamically balanced ductile iron impellers with integral shafts are manufactured per ASTM 536 Class 60-45-12 and 80-60-3 standards for increased strength during maximum load operation. Computer-designed impeller profiles help improve operating efficiency and airflow consistency.
Bearings
Extra capacity cylindrical roller bearings are designed to provide extended bearing life under maximum load and speed conditions. The drive shaft bearing delivers significantly longer service life compared to competitive units using standard ball bearings.
Gears
Precision spur timing gears are manufactured from SAE 8620 steel, carburized, and ground to 58–62 RC hardness for dependable continuous duty operation without creating damaging thrust loads.
Seals
Main air seals use piston ring-style sealing for minimum leakage. Bearing and drive shaft oil seals are Viton lip-type seals engineered for demanding, severe-duty industrial environments.