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Roots RCS J Series

The RCS-J pairs Roots' largest tri-lobe platform with WHISPAIR jet technology, delivering flows to 5,723 ICFM at pressures to 18 PSIG with 3-5 dB noise reduction. Available in 6 frame sizes (715, 721, 817, 821, 826, 832), RCS-J units employ the wrap-around plenum and jet port system to meter discharge pressure and reduce pulsation, enabling quiet, efficient operation in noise-restricted, high-capacity industrial environments. The tri-lobe design with WHISPAIR makes RCS-J ideal for large wastewater facilities and industrial vacuum applications requiring minimal noise impact.

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

Roots Blowers

RCS J Models (6)

Roots RCS J 715 — Roots RCS J positive displacement blower

Roots RCS J 715

RCS tri-lobe with Whispair jet porting for large-capacity, quiet, high-performance industrial operation

2,400 ICFM at 16 PSIG

Roots RCS J 721 — Roots RCS J positive displacement blower

Roots RCS J 721

RCS tri-lobe with Whispair jet porting for large-capacity, quiet, high-performance industrial operation

3,125 ICFM at 15 PSIG

Roots RCS J 817 — Roots RCS J positive displacement blower

Roots RCS J 817

RCS tri-lobe with Whispair jet porting for large-capacity, quiet, high-performance industrial operation

3,179 ICFM at 18 PSIG

Roots RCS J 821 — Roots RCS J positive displacement blower

Roots RCS J 821

RCS tri-lobe with Whispair jet porting for large-capacity, quiet, high-performance industrial operation

3,815 ICFM at 15 PSIG

Roots RCS J 826 — Roots RCS J positive displacement blower

Roots RCS J 826

RCS tri-lobe with Whispair jet porting for large-capacity, quiet, high-performance industrial operation

4,770 ICFM at 12 PSIG

Roots RCS J 832 — Roots RCS J positive displacement blower

Roots RCS J 832

RCS tri-lobe with Whispair jet porting for large-capacity, quiet, high-performance industrial operation

5,723 ICFM at 10 PSIG

Need a Roots RCS 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.

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RCS J Series Specifications

Capacity Range: 2,400–5,723 ICFM across frame sizes 715–832
Max Pressure: 18 PSIG (max)
Max Vacuum: 15–16 in.Hg
Max Speed: 2600 RPM (models 715–721); 2250 RPM (models 817–832)
Connection Sizes: 10 in. to 12 in. flange depending on frame size
Gearing: Carburized and ground alloy steel spur gears

Typical Applications

Large municipal wastewater treatment with noise compliance
High-capacity industrial vacuum and pressure boosting
Biogas and landfill gas handling in noise-sensitive areas
Thermal oxidation air supply with noise restrictions
Large pneumatic conveying systems requiring quiet operation

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