ROOTS™ 33 Universal RAI-G™ Blower

Model: 33 URAI-G

The ROOTS™ 33 URAI-G blower is engineered for continuous-duty gas handling systems requiring airflow to 195 CFM, operating pressures to 12 PSI, vacuum capability to 15" Hg, and speeds to 3600 RPM. Part of the URAI-G Blowers Frames 32 thru 615 series, this heavy-duty rotary blower integrates mechanical seals, precision-machined two-lobe impellers, 1/8″ NPT purge ports, anti-friction bearings, ground steel shafts, and a rigid cast iron casing for dependable leak-tested industrial gas transfer performance up to 225°F.

Key Specifications

Max Flow

195 CFM

Max Pressure

12 PSI

Max Vacuum

15" Hg

Maximum RPM

3600 RPM

Minimum RPM

1090 RPM

Maximum Temperature

225˚F

Manufacturer

Roots

IO&M Manuals

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Literature

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Technical Details

ROOTS™ Model 33 URAI-G

Flow Range: to 195 CFM

Max Δ Pressure: 12 psi

Max Δ Vacuum: 15″ Hg

Max ΔT: 225˚F

Connection Size: 2″ FPT

Shaft Diameter: 0.75″

Mechanical Seals: Yes

Purge Ports: 1/8″ NPT for buffer or seal gas

Leak Test: 15 psig static leak test

Drive End Lubrication: Synthetic Grease

Gear End Lubrication: Oil

Required Oil Gear End Horizontal Unit: 10.5 ounces

Required Oil Gear End Vertical Unit: 8.5 ounces

Unit Weight: 74 pounds (33.6 kg)

33 URAI-G Blower Design & Construction Features

Mechanical seals

Rigid one-piece cast iron casing

Anti-friction bearings

Splash oil lubricated spur timing gears

Straight precision-machined two-lobe impellers

Ground steel shafts

Cylindrical roller bearing for V-belt load resistance

Detachable steel mounting feet

Standard pipe size connections

1/8″ NPT purge ports for seal gas applications

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-G blowers are backed by a 2-year warranty with an additional 6 months covering shipping and construction where applicable. ROOTS synthetic lubricants are recommended for optimal sealing performance, thermal stability, and long-term blower reliability.