Roots Universal RAI (URAI)
General-purpose rotary lobe blowers, 6 to 1,700 CFM.
Overview
The URAI is the workhorse of the positive displacement family — a bi-rotational, single-stage rotary lobe blower engineered for continuous duty. Every unit we ship is bench-tested and shipped with the correct oil fill for your orientation.
Key features
- Interchangeable with prior Roots Universal RAI generations
- Splash-lubricated gear end, grease-lubricated drive end
- Ductile iron construction; ANSI flanged connections
- Available in horizontal or vertical airflow configuration
Available models
Representative sizing across the range. Our applications team confirms the right frame for your operating point.
| Model | Flow (ICFM) | Max Pressure / Vacuum | Notes |
|---|---|---|---|
| URAI 22 | 6 – 45 | 15 PSIG | — |
| URAI 24 | 13 – 78 | 15 PSIG | — |
| URAI 32 | 12 – 105 | 15 PSIG | — |
| URAI 33 | 17 – 130 | 15 PSIG | — |
| URAI 36 | 35 – 235 | 15 PSIG | — |
| URAI 45 | 42 – 300 | 15 PSIG | — |
| URAI 47 | 70 – 460 | 15 PSIG | — |
| URAI 56 | 80 – 570 | 15 PSIG | — |
| URAI 65 | 140 – 900 | 15 PSIG | — |
| URAI 615 | 270 – 1,600 | 15 PSIG | — |
| URAI 711 | 430 – 2,400 | 15 PSIG | — |
| URAI 718 | 700 – 3,900 | 15 PSIG | — |
Related products
Talk to an Expert
Ready to specify?
Tell us the flow, pressure and gas conditions — we'll come back with a right-sized recommendation, package options and lead time.
(800) 955-6188Roots Universal RAI (URAI) SKUs
55+ — engineered to your operating point.
Fast Response
Applications engineers on the line Mon–Fri, 7am–5pm PT.
Ready to move on your project?
Send us your operating conditions or a P&ID. Our applications team responds within one business day with sizing, package options and lead time.
- Flow, pressure and gas conditions review
- Frame size and drive recommendation
- Package, enclosure and accessory options
- Lead time and firm quote