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ROOTS™ RAM™ WHISPAIR 406 Rotary Positive Displacement Blower

Model: RAM WHISPAIR 406

The ROOTS™ RAM WHISPAIR™ 406 blower is designed for industrial environments where airflow efficiency and lower operational noise are equally critical. Part of the RAM™ WHISPAIR Rotary Positive Blowers 404J through 624J series, this rotary positive displacement blower delivers airflow up to 601 CFM with operating pressures to 18 PSI, vacuum capability to 16″ Hg, and speeds reaching 4000 RPM. Engineered with advanced acoustic and airflow optimization, the blower reduces sound levels, minimizes operating power requirements, and maintains stable continuous-duty performance across demanding industrial air systems. Its rugged internal construction combines alloy steel timing gears, cylindrical roller bearings, piston ring air seals, lip-type hydrodynamic shaft sealing, and splash oil lubrication for dependable long-term operation.

Key Specifications
Max Flow
601 CFM
Max Pressure
18 PSI
Max Vacuum
16″ Hg
Maximum RPM
4000 RPM
Minimum RPM
850 RPM
Maximum Temperature
240ËšF
Manufacturer
Roots
IO&M Manuals
Literature

Technical Details

ROOTS™ RAM™ Whispair 406
Model: Roots RAM WHISPAIR 406
Flow Range: to 601 CFM
Max Δ Pressure: 18 psi
Max Δ Vacuum: 16″ Hg
Maximum RPM: 4000
Minimum RPM: 850
Max ΔT: 240˚F
Connection Size: 4″ FPT
Shaft Diameter: 1.5″
Drive End Lubrication: Oil
Gear End Lubrication: Oil
Required Oil for Horizontal Unit: 55 ounces
Required Oil for Vertical Unit: 27 ounces
Unit Weight: 300 pounds (136.4 kg)

RAM™ Whispair 406 Design & Construction Features

Low noise operation design
Reduced operating power requirements
Improved volumetric efficiency
Reduced operating temperatures
Alloy steel timing gears
Cylindrical roller bearings
Piston ring air seals
Lip-type hydrodynamic drive shaft seal
Splash oil lubrication system
Horizontal and vertical configurations available
Rugged repositionable steel mounting feet
Die-cast aluminum drive and gear covers
Engineered for continuous-duty industrial airflow systems

Warranty Information

The ROOTS™ RAM™ WHISPAIR 406 Rotary Positive Displacement Blower is covered by a 24-month warranty from the date of original unit start-up, or 30 months from the date of original shipment — whichever occurs first.