ROOTS™ 33 Universal RAI-J Blower
Model: 33 URAI-J
The ROOTS™ 33 URAI-J™ WHISPAIR™ rotary blowers are specifically engineered to deliver quieter operation while maintaining reliable industrial airflow performance. It delivers up to 195 CFM airflow with 12 PSI pressure and 15″ Hg vacuum capability for continuous-duty industrial air systems. With frames 33J thru 56J series, it features low-noise operation, reduced vibration, precision two-lobe impellers, anti-friction bearings, splash oil lubricated gears, and rugged cast-iron construction for dependable performance.
Technical Details
ROOTS™ 33 Universal RAI-J
Model: Roots Model 33 URAI-J®
Flow Range: to 195 CFM
Max Δ Pressure: 12 psi
Max Δ Vacuum: 15″ Hg
Maximum RPM: 3600
Minimum RPM: 1090
Max ΔT: 225˚F
Connection Size: 2″ FPT
Shaft Diameter: 0.75″
Drive End Lubrication: Grease
Gear End Lubrication: Oil
Required Oil for Gear End Horizontal Unit: 10.5 ounces
Required Oil for Gear End Vertical Unit: 8.5 ounces
Unit Weight: 84 pounds (38.2 kg)
33 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