- Detachable steel mounting feet
- Rigid one-piece, cast-iron casing
- Anti-friction bearings
- Splash lubricated spur timing gears
- Connections in standard pipe sizes
- WHISPAIR™ noise‑reduction design
Heavy-duty, versatile, bi‑lobe rotary blowers with reduced noise.
The ROOTS® Universal RAI‑J™ heavy‑duty, versatile rotary blowers are designed with detachable, rugged steel mounting feet that permit easy in‑field adaptability to vertical or horizontal installation requirements. Units can be easily adapted to any of four drive shaft positions: right, left, bottom, or top. The URAI‑J model incorporates WHISPAIR™ technology engineered to deliver low‑noise performance by reducing pressure pulsations and decreasing emitted sound levels by 3 to 5 decibels.
This makes the URAI‑J a strong fit for applications requiring quieter operation without compromising durability or performance.
- Pressures to 15 psig (1034 mbar)
- Vacuums to 16” Hg (539 mbar)
- Flows to 630 cfm (1070 m3/hr)
- Available with metric drive shaft and pipe connections
- Versatile Mounting Options: Detachable mounting feet offer versatility for four drive shaft positions: right, left, bottom, or top.
- Durable Construction: Compact and sturdy design ensures continuous service when operated within speed and pressure ratings.
- Robust Components: Basic model features durable construction with cast iron casing, alloy steel gears, and cast iron impellers.
- Enhanced Bearing Strength: Oversized antifriction bearings and cylindrical roller bearing to withstand V-belt pull.
- Reduced Vibration: Smoother operation due to reduced pressure pulsations.
- Noise Reduction: WHISPAIR technology controls backflow of air, reducing noise levels.
- Lower Air Pulsation: WHISPAIR blowers operate with up to 40% less pressure pulsation than conventional blowers, enhancing efficiency and performance.
- Low‑Noise Operation: Engineered specifically for users seeking a low noise rotary blower solution without sacrificing reliability or airflow capacity.
Understanding how WHISPAIR™ technology reduces noise and pulsation
Noise‑Reduction Factor | How It Works | Benefits |
|---|---|---|
WHISPAIR™ Backflow Control | Manages internal air return to reduce turbulence | Lower emitted noise (3–5 dB reduction) |
Reduced Pressure Pulsation | Up to 40% less pulsation than conventional blowers | Smoother system operation |
Cast‑Iron Housing | Rigid structure minimizes vibration | More stable, quieter performance |
Bi‑Lobe Rotor Design | Consistent airflow with less mechanical disturbance | Lower vibration and noise |