ROOTS™ 47 Universal RAI-J Blower
Model: 47 URAI-J
The ROOTS™ 47 URAI-J™ WHISPAIR™ rotary blower is designed for quieter continuous-duty industrial airflow applications with performance up to 523 CFM, 7 PSI pressure, 15″ Hg vacuum, and 3600 RPM speeds. Its rugged cast-iron casing, precision two-lobe impellers, alloy steel timing gears, anti-friction bearings, grease and splash lubrication system, and ROOTS’ exclusive figure-eight gearbox design help reduce vibration, airflow pulsation, operational noise, and heat buildup for reliable long-term blower performance.
Technical Details
ROOTS™ 47 Universal RAI-J
Model: Roots Model 47 URAI-J®
Flow Range: to 523 CFM
Max Δ Pressure: 7 psi
Max Δ Vacuum: 15″ Hg
Max RPM: 3600
Min RPM: 848
Max ΔT: 225˚F
Connection Size: 3″ FPT
Shaft Diameter: 0.875″
Drive End Lubrication: Grease
Gear End Lubrication: Oil
Required Oil for Gear End Horizontal Unit: 14.5 ounces
Required Oil for Gear End Vertical Unit: 12.7 ounces
Unit Weight: 138 pounds (62.7 kg)
47 URAI-J Blower Design & Construction Features
Detachable steel mounting feet
Rigid one-piece cast-iron casing
Anti-friction bearings
Splash oil lubricated spur timing gears
Straight precision-machined two-lobe impellers
Ground steel shafts
Standard pipe size connections
Cylindrical roller bearing for V-belt load resistance
Computer-designed cast relief for noise suppression
Lower vibration and reduced air pulsation design
Performance Advantages
Lower operational noise
Reduced air pulsation
Lower vibration levels
Extended bearing and gear life
Reliable continuous-duty operation
Improved airflow stability for industrial systems