ROOTS RAM WHISPAIR 409 Rotary Positive Displacement Blower

ROOTS™ RAM™ WHISPAIR 409 Rotary Positive Displacement Blower

Model: RAM WHISPAIR 409

Part of the RAM™ WHISPAIR series spanning Frame 404J through 624J, the ROOTS™ RAM™ WHISPAIR 409 steps up airflow capacity to 900 CFM while maintaining the low-noise, reduced-power operation that sets the WHISPAIR line apart. Rated to 18 PSI, 16″ Hg vacuum, and 4000 RPM, this CNC-precision blower features a lip-type hydrodynamic drive shaft seal, alloy steel timing gears, cylindrical roller bearings, and splash oil lubrication — purpose-built for noise-sensitive, high-demand industrial environments.

Key Specifications

Max Flow

900 CFM

Max Pressure

18 PSI

Max Vacuum

16″ Hg

Maximum RPM

4000 RPM

Minimum RPM

850 RPM

Manufacturer

Roots

IO&M Manuals

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Literature

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Technical Details

ROOTS™ RAM™ Whispair 409

Model: Roots RAM WHISPAIR 409

Flow Range: to 900 CFM

Max Δ Pressure: 18 psi

Max Δ Vacuum: 16″ Hg

Maximum RPM: 4000

Minimum RPM: 850

Max ΔT: 240˚F

Connection Size: 5″ FPT

Shaft Diameter: 1.5″

Drive End Lubrication: Oil

Gear End Lubrication: Oil

Required Oil – Horizontal Unit: 55 ounces

Required Oil – Vertical Unit: 27 ounces

Unit Weight: 350 pounds (159.1 kg)

RAM™ Whispair 409 Design & Construction Features

Low noise level with less operating power required for noise-sensitive facility environments

Improved volumetric efficiency with reduced operating temperatures at elevated flow rates

Alloy steel timing gears rated for continuous high-load industrial cycles

Cylindrical roller bearings for reliable long-service high-speed performance

Piston ring air seals for effective pressure and vacuum containment

Lip-type hydrodynamic drive shaft seal for enhanced sealing integrity and reduced friction

Splash oil lubrication for low-maintenance gear and drive end protection

Repositionable rugged steel mounting feet for flexible field installation

Die-cast aluminum drive end and gear covers to reduce weight and simplify maintenance access

Horizontal and vertical configurations available

State-of-the-art CNC manufacturing for dimensional consistency and extended operational life

Warranty Information

The ROOTS™ RAM™ WHISPAIR 409 Rotary Positive Displacement Blower is backed 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.