ROOTS™ 728 TRI RAM Blower

Model: 728 TRI-RAM

When industrial airflow demands scale up beyond what mid-range frames can handle, the ROOTS™ 728 TRI-RAM comes as one of the most capable units in the Roots™ Tri-RAM™ Positive Displacement Blowers series. Rated to 4152 CFM, 12 PSI, and 3050 RPM, this heavy-duty blower carries the tri-lobe engineering principles Roots first developed in 1914 into high-volume territory, pairing integral-shaft ductile-iron impellers with WHISPAIR™ discharge technology to move serious air volume with controlled pulsation, lower vibration, and measurably quieter output than conventional tri-lobe designs at this scale.

Key Specifications

Max Flow

4152 CFM

Max Pressure

12 PSI

Max Vacuum

16″ Hg

Maximum Speed

3050 RPM

Manufacturer

Roots

IO&M Manuals

Download

Technical Details

Model: ROOTS 728 TRI-RAM

Flow Range: to 4152 CFM

Max Δ Pressure: 12 psi

Max Δ Vacuum: 16″ Hg

Maximum RPM: 3050

Minimum RPM: 545

Max ΔT: 240˚F

Inlet Connection: 300 mm

Discharge Connection: 250 mm

Shaft Diameter: 60 mm

Drive End Lubrication: Oil

Gear End Lubrication: Oil

Unit Weight: 1540 lbs

Roots 728 Tri-RAM Design and Features

Three-lobe geometry suppresses harsh line pulsations to protect downstream processing pipes

The WHISPAIR™ backflow relief layout significantly minimizes noise generation at the source

Rigid ductile iron impellers with integral shafts optimize overall machine efficiency

Taper-mounted alloy steel timing gears prevent slippage to ensure continuous timing accuracy

Robust cylindrical bearings are selected to manage extreme side loads from belt drives

Precision piston ring seals minimize process air loss across internal headplate openings

Independent splash oil sumps deliver constant lubrication to the critical drive assemblies

Integrated dual-end sight windows allow operators to visually verify oil health quickly

Removable steel support feet provide simple on-site adaptation to vertical or horizontal layouts

The extended drive shaft design accommodates custom pulley and coupling alignments easily

Warranty Information

Models 409 through 621 include warranty coverage for 24 months from startup or 30 months from shipment date, whichever occurs first.

Models 728 through 832 include warranty coverage for 12 months from startup or 18 months from shipment date, whichever occurs first.