ROOTS™ Universal 56 URAI

Model: 56 URAI

The ROOTS™ Universal RAI blower Model 56 URAI is engineered with balanced bi-lobe involute impellers, carburized and ground alloy steel spur timing gears, and oversized anti-friction bearings for continuous-duty rotary positive displacement performance. Designed for airflow to 580 CFM and pressures to 13 psi, the unit incorporates grease lubrication on the drive end, splash oil lubrication on the gear end. Its rigid one-piece cast iron casing, thrust-controlled rotor assembly, and detachable steel mounting feet provide stable airflow efficiency and adaptable installation flexibility across Frames 22 thru 718.

Key Specifications

Max Flow

580 CFM

Max Pressure

13 psi

Max Vacuum

15" Hg

Maximum RPM

2850 RPM

Manufacturer

Roots

IO&M Manuals

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Literature

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Technical Details

Universal RAI Blower

Roots Blower Model 56 URAI

Flow Range: to 580 CFM

Max Δ Pressure: 13 psi

Max Δ Vacuum: 15″ Hg

Maximum RPM: 2850

Minimum RPM: 763

Max ΔT: 225˚F

Connection Size: 4″ FPT

Shaft Diameter: 1.125″

Drive End Lubrication: Grease

Gear End Lubrication: Oil

Required Oil – Horizontal Unit: 27.6 ounces

Required Oil – Vertical Unit: 16 ounces

56 URAI Blower Design & Construction Features

Steel detachable mounting feet

Rigid one-piece cast iron casing

Anti-friction bearings

Thrust control configuration

Splash oil lubricated spur timing gears

Standard pipe size connections

Balanced precision-machined bi-lobe impellers

Ground steel shafts

Cast iron involute impeller construction

Cylindrical roller bearing at drive shaft for increased V-belt load capacity

Adaptable right-hand, left-hand, top, or bottom shaft positioning

Carburized and ground alloy steel timing gears with taper-lock mounting

Vertical and horizontal installation flexibility

Compatible with silencers, relief valves, filters, couplings, and extended bases

Warranty Information

ROOTS™ Universal RAI® blowers are covered by a 2-year operational warranty with an additional 6 months for shipping and construction periods where applicable. ROOTS synthetic oil is recommended to support longer lubricant life and dependable operating performance.