Premium Howden Roots Positive Displacement Blowers

Your Complete Source for Industry-Leading Blower Technology

Air Blower Services is your factory-authorized distributor for the complete line of Howden Roots positive displacement blowers—the proven choice for demanding industrial applications worldwide. From wastewater treatment and pneumatic conveying to chemical processing and power generation, Roots blowers deliver reliable, efficient performance you can count on.

Why Choose Howden Roots Blowers?

  • Proven Reliability: Over a century of engineering excellence and millions of installations worldwide
  • Wide Performance Range: From compact units to high-volume systems up to 5,600 CFM
  • Pressure Versatility: Discharge pressures to 30 psig and vacuum to 27" Hg
  • Factory Support: Genuine OEM parts, expert service, and full factory warranty coverage
  • Application Expertise: Our engineers help you select the perfect blower for your specific requirements

Need help selecting the right blower? Call 630.372.9222 to speak with an application engineer. We provide complete system design, installation support, and ongoing service for all models below.

Complete Roots Blower Product Line:

ROOTS™ UNIVERSAL RAI® Rotary Positive Displacement Blowers

The Universal RAI series represents the gold standard in industrial positive displacement blowers—engineered for maximum reliability and operational flexibility. These heavy-duty workhorses deliver proven performance in the most demanding applications, from wastewater treatment to pneumatic conveying.

Designed for Your Operation: The innovative detachable mounting system provides unmatched installation versatility. Configure your URAI blower for vertical or horizontal mounting with four drive shaft position options (right, left, bottom, or top) to fit your space constraints perfectly. The compact, robust design ensures continuous service and exceptional longevity when operated within speed and pressure ratings.

Built to Last: Every URAI blower features industrial-grade components including cast iron casing, cast iron involute impellers, and carburized alloy steel timing gears for years of dependable operation. Oversized antifriction bearings and cylindrical roller bearings at the drive shaft handle heavy loads and resist V-belt pull. Advanced thrust control with dual lubrication systems (splash oil on gear end, grease on drive end) minimizes maintenance requirements.

Complete System Solutions: We offer comprehensive accessory packages including drivers, relief valves, inlet/discharge silencers, filters, check valves, extended bases, and drive guards—everything needed for a turnkey installation.

ROOTS™ RAM™ Rotary Blowers

When your application demands superior efficiency and reduced maintenance, the RAM series delivers. These advanced rotary blowers combine cutting-edge engineering with field-proven reliability to maximize your operational uptime and minimize total cost of ownership.

Advanced Engineering for Peak Performance: RAM blowers feature integral-shaft ductile iron impellers with precision involute profiles for optimal airflow efficiency. The rigid one-piece grey iron casing provides exceptional durability, while lightweight aluminum covers reduce overall weight without compromising strength. Premium carburized alloy steel timing gears and cylindrical roller bearings ensure smooth, quiet operation and extended service life.

Superior Sealing Technology: Multiple sealing innovations set RAM blowers apart. Piston rings minimize air leakage at shaft openings, lip-type oil seals prevent lubricant contamination of the air stream, and hydrodynamic drive shaft seals eliminate oil leaks. This multi-layer sealing approach means cleaner operation, reduced maintenance, and lower operating costs.

Installation Flexibility: Like all Howden Roots products, RAM blowers feature detachable mounting feet for easy field configuration. Choose vertical or horizontal mounting, with extended shaft options for side, top, or bottom outlet drive configurations to match your installation requirements perfectly.

ROOTS™ Tri-RAM™ Rotary Blowers

Experience the next generation in quiet, efficient blower technology. The Tri-RAM series combines over a century of Roots engineering excellence (tri-lobe technology first introduced in 1914) with modern innovations to deliver dramatically reduced noise, minimal vibration, and smoother airflow with virtually no downstream pulsation.

Superior Performance in Demanding Environments: Built on the proven success of the RAM series, Tri-RAM blowers are ideal for applications where noise reduction is critical—from hospitals and food processing facilities to urban industrial sites with strict sound ordinances. The advanced tri-lobe design provides smoother operation, extended component life, and improved energy efficiency compared to traditional two-lobe configurations.

ROOTS™ RCS Rotary Positive Blowers

RCS rotary blowers are heavy-duty units designed with integral-shaft ductile iron impellers having an involute profile. The headplates, gear cover, end cover and rigid, one-piece casing are grey iron. Carburized and ground alloy steel spur timing gears are taper mounted on the shafts, secured with a locknut. Cylindrical roller bearings are used on the drive end with ball bearings on the gear end. Piston rings reduce air leakage through the shaft openings in the headplates, and lip-type oil seals prevent lubricant from entering the air chamber. The RCS incorporates thrust control, with splash oil lubrication at both ends of the blower. All units are designed with detachable rugged steel mounting feet which permit in-field adaptability to either vertical or horizontal installation requirements. The top shaft is extended for drive on side outlet blowers, and either shaft can be extended for drive on top or bottom outlet blowers. All frame sizes are center-timed to allow rotation in either direction.

ROOTS-FLO Rotary Positive Blowers

Patented ROOTS-FLO blowers are heavy duty rotary units in a compact, sturdy design engineered for reliable pneumatic conveying of grain and similar product. The basic model features a ribbed cast iron casing and ridged headplates, carburized and ground alloy steel spur timing gears secured to steel shafts with a taper mounting and locknut, and cast iron involute impellers. Oversized anti-friction bearings are used, with a cylindrical roller bearing at the drive shaft to withstand V-belt pull. Detachable rugged steel mounting feet permit easy in-field daptability to either veritcal or horizontal installation requirements.

DVJ & DPJ Rotary Positive Displacement Blowers

ROOTS DVJ blowers feature an excluseive discharge jet plenum deisgned to allow cool, atmospheric air to flow into the casing. This unique design permits continuous operation at levels to blank-off with a single stage unit, without water injection or heat exchangers. In the case of ROOTS DPJ blowers, discharge air is cooled before injecting into discharge jet plenum. headplates and the rigid casing are cast from grey iron, with aluminum dirive end and gear covers. Carburized ground alloy steel spur timing gears are securely munted on taper end shafts. Thsese units are designed with detachable steel mounting feet to permit in-field adaptability to discharge left, right or vertically upwards.

RAS-J Positive Displacement Blower

RAS-J series Whispair blowers are heavy duty units for continuous service featuring a proprietary design that reduces noise, pulsation, and horsepower levels over conventional blowers. An exclusive rap-around plenum and Whispair™ jet eliminate rapid backflow of air into the blower from the discharge area - a major problem with conventional blowers.

Whispair Max Positive Displacement Blowers

The Whispair Max Rotary Positive Blower has a proprietary design that reduces noise and power loss by utilizing an exclusive wrap-around flange and jet to control pressure equalization.