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ROOTS™ RAM™ Frame 404 Rotary Positive Blower

Model: RAM Frame 404

The ROOTS™ RAM™ 404 is part of the industry-trusted RAM series — spanning Frame 404 through 624 — and represents Roots' commitment to Reliability, Availability, and Maintainability in every rotary positive displacement blower it manufactures. Engineered for high-demand industrial environments, the RAM 404 delivers flow capacities up to 396 CFM, operating pressures to 18 PSI, vacuum capability to 16″ Hg, and speeds reaching 4000 RPM. Built with alloy steel timing gears, cylindrical roller bearings, piston ring air seals, and splash oil lubrication, this blower is precision-manufactured using state-of-the-art CNC machine tools — ensuring consistent performance, reduced operating temperatures, and improved volumetric efficiency for applications where downtime simply isn't an option.

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

Technical Details

ROOTS™ RAM™ Frame 404
Model: Roots RAM Frame 404
Flow Range: to 396 CFM
Max Δ Pressure: 18 psi
Max Δ Vacuum: 16″ Hg
Maximum RPM: 4000
Minimum RPM: 850
Max ΔT: 240˚F
Connection Size: 3″ 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: 200 pounds (90.9 kg)

RAM Frame 404 Design & Construction Features

Horizontal and vertical configurations available
Improved volumetric efficiency
Reduced operating temperatures
Alloy steel timing gears
Cylindrical roller bearings
Piston ring air seals
Splash oil lubrication system
Rugged repositionable steel mounting feet
Die-cast aluminum drive end covers
Die-cast aluminum gear covers
Engineered for easier maintenance access
Designed for continuous-duty industrial operation

Warranty Information

ROOTS™ RAM blowers are backed by a warranty period of 24 months from the original unit start-up date or 30 months from the original shipment date, whichever occurs first.