ROOTS™ RAM™ Frame 409 Rotary Positive Blower

Model: RAM Frame 409

Stepping up in capacity within the trusted RAM™ Blowers series, spanning Frame 404 through 624, the ROOTS™ RAM™ 409 Rotary Positive Displacement Blower handles demanding industrial airflow at up to 900 CFM, pressures to 18 PSI, vacuum to 16″ Hg, and speeds reaching 4000 RPM. CNC-manufactured to exacting tolerances, the RAM 409 pairs alloy steel timing gears, cylindrical roller bearings, and piston ring air seals with splash oil lubrication and repositionable steel mounting feet, delivering the high-output performance and low-maintenance accessibility that plant operators and engineers depend on.

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™ Frame 409

Model: Roots RAM Frame 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: 4″ 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: 270 pounds (122.7 kg)

RAM Frame 409 Design & Construction Features

Horizontal and vertical mounting configurations available

Improved volumetric efficiency with reduced operating temperatures

Alloy steel timing gears for durability under sustained load

Cylindrical roller bearings engineered for high-speed performance

Piston ring air seals for reliable pressure and vacuum containment

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

Repositionable rugged steel mounting feet for flexible installation

Die-cast aluminum drive end and gear covers to reduce weight and ease servicing

State-of-the-art CNC manufacturing for dimensional consistency and long service life

Warranty Information

The ROOTS™ RAM™ 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 comes first.