ROOTS™ 47 Universal RAI DSL

Model: 47 URAI DSL

The ROOTS™ 47 Universal RAI DSL blower delivers airflow to 523 CFM with operating pressures to 7 PSI and speeds to 3600 RPM. Engineered for continuous-duty operation, it features dual splash oil lubrication, precision-machined bi-lobe impellers, carburized alloy steel timing gears, oversized anti-friction bearings, and Howden’s figure-eight gearbox design for enhanced oil distribution and bearing protection. It is also designed with rugged detachable steel mounting feet allowing vertical or horizontal installation flexibility. Units can be configured for right-hand, left-hand, top, or bottom shaft positions to simplify OEM integration and field replacement applications.

Key Specifications

Max Flow

523 CFM

Max Pressure

7 PSI

Max Vacuum

15" Hg

Maximum RPM

3600 RPM

Minimum RPM

848 RPM

Manufacturer

Roots

IO&M Manuals

Download

Literature

Download

Technical Details

Universal RAI DSL Blower

ROOTS™ Model 47 URAI DSL

Model: Roots Model 47 URAI DSL

Flow Range: to 523 CFM

Max Δ Pressure: 7 psi

Max Δ Vacuum: 15″ Hg

Max ΔT: 225˚F

Connection Size: 3″ FPT

Shaft Diameter: 0.875″

Drive End Lubrication: Oil

Gear End Lubrication: Oil

Required Oil Gear End Horizontal Unit: 14.5 ounces

Required Oil Drive End Horizontal Unit: 10.8 ounces

Required Oil Gear End Vertical Unit: 12.7 ounces

Required Oil Drive End Vertical Unit: 5.5 ounces

Unit Weight: 132 pounds (60 kg)

47 Universal RAI DSL Blower Design & Construction Features

Steel detachable mounting feet

Rigid one-piece cast iron casing

Anti-friction bearings

Splash oil lubricated spur timing gears

Splash oil lubricated drive end bearings

Standard pipe size connections

Balanced precision-machined bi-lobe impellers

Ground steel shafts

Cylindrical roller bearing for V-belt load support

Two shaft-mounted oil slingers

Howden figure-eight gearbox design

3/8″ oil level sight glasses

Accessories

Available accessories include driver packages, inlet and discharge silencers, relief valves, inlet filters, check valves, extended bases, V-belt drives, flexible couplings, drivers, and drive guards.

Warranty Information

Roots URAI DSL blowers are covered by a 2-year warranty plus an additional 6 months for shipping and construction where applicable. ROOTS synthetic oil is recommended for maximum lubrication performance and service life. Oil sight glasses are provided for accurate oil level monitoring during operation.