ROOTS FLO® 409 Rotary Positive Displacement Blower
Model: ROOTS FLO® 409
The Roots-Flo Rotary Blower - 409 features dynamically balanced ductile-iron impellers, computer-designed to maximize processing efficiency up to 900 CFM. This 280-pound unit uses a specialized gearbox to optimize oil distribution across heavy-duty spur gears. Removable steel mounting feet allow simple conversion between vertical and horizontal configurations, giving field technicians ultimate adaptability when setting up severe-duty pneumatic transport lines.
Technical Details
Model: ROOTS FLO® 409
Flow Range: Up to 900 CFM
Max Δ Pressure: 15 psi
Max Δ Vacuum: 16″ Hg
Maximum RPM: 4000
Minimum RPM: 850
Max ΔT: 275˚F
Connection: Bolt On Adapter (T30031021 or T30032021)
Shaft Diameter: 1.4375″
Drive End Lubrication: Oil
Gear End Lubrication: Oil
Required Oil Horizontal Unit: 50 ounces
Required Oil Vertical Unit: 30 ounces
Unit Weight: 280 pounds (127 kg)
Roots FLO 409 Design and Features
Heavy-duty cast iron housing built to ASTM A 48 Class 30B specifications
Hardened cast iron shaft sleeves for improved wear resistance
Durable, rigid headplates for added structural stability
Splash oil lubrication system at both ends
Top drive horizontal airflow configuration
Left-hand or right-hand drive options for vertical flow installations
Precision-machined ductile iron impellers with integral shafts
Carburized alloy steel timing gears engineered for continuous operation
Cylindrical roller bearings designed for extended bearing life
Viton lip oil seals and piston ring air seals for dependable sealing performance
Warranty Information
Machined ductile iron impellers are dynamically balanced and manufactured to ASTM 536 Class 60-45-12 and 80-60-3 standards for reliable operation under maximum load conditions.
Computer-engineered impeller profiles help improve airflow efficiency and maintain steady blower performance.
Extra-capacity cylindrical roller bearings are designed for demanding industrial environments and provide substantially longer service life compared to standard ball-bearing configurations.
Spur timing gears are manufactured from SAE 8620 steel, carburized, and precision ground to 58–62 RC hardness for dependable continuous-duty service.
Piston ring-style air seals help minimize leakage, while Viton lip oil seals protect the bearing and drive-shaft areas during severe-duty operation.