Roots Universal RAI-J (Whispair)
Whispair jet-porting for quieter operation and lower pulsation.
Overview
The URAI-J adds Roots' patented Whispair jet-porting to the Universal RAI platform. A small controlled reverse-flow jet at the discharge port smooths pressure pulses before they leave the casing — dropping sound levels and torsional load with no penalty in flow.
Key features
- Whispair jet-porting reduces pulsation and noise
- Uni-directional — rotation must match nameplate arrow
- Compatible with URAI foundation and piping envelope
- Ideal for wastewater aeration and dilute-phase conveying
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-J 47 | 70 – 460 | 15 PSIG | — |
| URAI-J 56 | 80 – 570 | 15 PSIG | — |
| URAI-J 65 | 140 – 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-J (Whispair) SKUs
5+ — 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