ROOTS™ 42 Universal RAI-G™ Blower
Model: 42 URAI-G
The ROOTS™ 42 URAI-G gas blower is designed for continuous-duty gas handling systems with airflow up to 187 CFM, operating pressures to 15 PSI, vacuum capability to 16" Hg, and maximum operating speeds of 3600 RPM. Part of the URAI-G Blowers Frames 32 thru 615 series, this heavy-duty rotary blower incorporates mechanical seals, precision-machined two-lobe impellers, 1/8″ NPT purge ports, ground steel shafts, anti-friction bearings, and a rigid cast iron casing to deliver reliable leak-tested gas transfer performance in industrial applications up to 240°F. ROOTS™ synthetic oil and grease are highly recommended to maximize lubrication efficiency, operating reliability, and long-term rotary blower performance.
Technical Details
ROOTS™ 42 URAI-G Blower
Model: Roots Model 42 URAI-G
Flow Range: to 187 CFM
Max Δ Pressure: 15 psi
Max Δ Vacuum: 16″ Hg
Max ΔT: 240˚F
Connection Size: 1.5″ FPT
Shaft Diameter: 0.875″
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 for Gear End Horizontal Unit: 14.5 ounces
Required Oil for Gear End Vertical Unit: 12.7 ounces
Unit Weight: 88 pounds (40 kg)
42 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
Detachable steel mounting feet
Standard pipe size connections
1/8″ NPT purge ports for seal gas applications