Roots RAS-J Blowers
Whispair-ported frame for 6- and 8-inch aeration duty.

Overview
The RAS-J extends Whispair jet-porting into the larger 6- and 8-inch inlet frames used by mid-sized municipal aeration plants. Bi-rotational alternatives exist but the -J variant is picked for pulsation-sensitive systems.
Key features
- Pulsation control for aeration diffuser networks
- Compatible with existing RAS foundations
- Oil-lubricated bearings on both ends
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 |
|---|---|---|---|
| RAS-J 615 | 600 – 1,700 | 15 PSIG | — |
| RAS-J 624 | 900 – 2,500 | 15 PSIG | — |
| RAS-J 818 | 1,200 – 3,200 | 15 PSIG | — |
| RAS-J 824 | 1,500 – 3,800 | 15 PSIG | — |
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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 RAS-J Blowers SKUs
9+ — 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



