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Roots RAM J Series

The RAM-J combines Roots' industrial-grade bi-lobe platform with WHISPAIR jet technology, delivering pressures to 18 PSIG while reducing pulsation and noise by 3-5 dB. The wrap-around plenum and jet ports feed pressurized, cooled air into the blower chamber, aiding rotation and enabling higher pressure ratios with single-stage operation. Available in 7 frame sizes (404–624), RAM-J blowers serve noise-sensitive, high-pressure pneumatic and aeration applications requiring the robustness of the RAM platform with the quiet efficiency of WHISPAIR technology.

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New to Roots blowers? See our Industrial Rotary Lobe Blower overview

Roots Blowers

RAM J Models (7)

Roots RAM J 404 — Roots RAM J positive displacement blower

Roots RAM J 404

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

298 ICFM at 18 PSIG

Roots RAM J 406 — Roots RAM J positive displacement blower

Roots RAM J 406

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

601 ICFM at 18 PSIG

Roots RAM J 409 — Roots RAM J positive displacement blower

Roots RAM J 409

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

900 ICFM at 18 PSIG

Roots RAM J 412 — Roots RAM J positive displacement blower

Roots RAM J 412

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

1,400 ICFM at 18 PSIG

Roots RAM J 418 — Roots RAM J positive displacement blower

Roots RAM J 418

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

2,950 ICFM at 10 PSIG

Roots RAM J 616 — Roots RAM J positive displacement blower

Roots RAM J 616

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

2,162 ICFM at 15 PSIG

Roots RAM J 624 — Roots RAM J positive displacement blower

Roots RAM J 624

RAM bi-lobe with Whispair jet porting for high-pressure, low-noise operation

3,244 ICFM at 10 PSIG

Need a Roots RAM J quote?

Authorized Roots distributor since 1961. Tell us your CFM, pressure, and application — we'll size the blower, quote the package, and support it for the life of the unit. See our Roots service center.

Request a Quote Call (800) 955-6188

RAM J Series Specifications

Capacity Range: 298–3,244 ICFM across frame sizes 404–624
Max Pressure: 18 PSIG
Max Vacuum: 16 in.Hg
Max Speed: 4000 RPM (frames 404–412); 3000 RPM (frames 616–624)
Connection Sizes: 2.0 in. to 12 in. depending on frame size
Gearing: Carburized and ground alloy steel spur gears

Typical Applications

High-pressure, noise-sensitive wastewater treatment
Pneumatic conveying of dense material under pressure
Industrial forced-air systems requiring quiet operation
High-pressure vacuum applications
Noise-restricted facilities with pressure requirements

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