RAM Blowers
Frames 404 thru 624

RAM™ rotary blowers are heavy-duty units designed with integral-shaft ductile iron impellers having aninvolute profile. The headplates and rigid, one-piece casing are grey iron, while the drive end cover and gear cover are aluminum. Carburized and ground alloy steel spur timing gears are taper mounted on the shafts, secured with a locknut. Cylindrical roller
bearings are used on all units. Piston rings reduce air leakage through the shaft openings in the headplates, and lip-type oil seals prevent lubricant from entering the air chamber. A
hydrodynamic seal on the drive shaft prevents shaft seal oil leaks. RAM rotary blowers incorporate thrust control, with splash oil lubrication at both ends of the blower. All frame sizes are designed with detachable rugged steel mounting feet which permit in-field adaptability to either vertical or horizontal installation requirements. The top shaft is extended for drive on side outlet blowers, and either shaft can be extended for drive on top or bottom outlet blowers.

• 4" (10.16 cm) thru 6" (15.24 cm) gear diameter

Specification Sheet

RAM-J Blowers
Frames 404J thru 624J

Incorporates ROOTS™ Whispair™ technology to reduce noise levels.

RAM™ WHISPAIR™ rotary blowers are heavy-duty units designed with integral-shaft ductile iron impellers having an involute profile. WHISPAIR blowers reduce noise and power loss by utilizing an exclusive wraparound plenum and proprietary WHISPAIR jet to control pressure equalization-feeding backflow in the direction of impeller movement, thereby aiding rotation.

• Pressure to 18 psig (1240 mbar)
• Vacuum to 16" Hg (542 mbar)
• Flows 100 to 3500 cfm (170 to 5947 m3/hr)

Specification Sheet

RAM-GJ Blowers
Frames 404J thru 624J

The RAM™ WHISPAIR™ line of standard rotary positive gas pumps is intended for use with non-corrosive gases. Stainless steel construction is available for corrosive gases and optional O-ring material is also available. The gas pumps have a proprietary design that
reduces noise and power loss by utilizing an exclusive wrap-around flange and jet to control pressure equalization - eliminating rapid backflow of gas into the pump from the discharge area.

• Designed or gas services
• Low noise level, less operating power required
• Improved volumetric efficiency and reduced operating temperatures
• Alloy steel timing gears
• Cylindrical roller bearings
• Long-life mechanical seals-hydrodynamic drive shaft seal
• Splash oil lubrication
• Fewer moving parts-no valves or vanes to wear
• Horizontal and vertical configurations available
• Stainless steel construction available for corrosive gases

Specification Sheet

RAM-DVJ Blowers
Frames 406J, 412J and 616J

ROOTS™ RAM™-DVJ WHISPAIR™ dry exhausters have an exclusive discharge jet plenum design which allows cool, atmospheric air to flow into the cylinder. This unique design permits continuous operation at vacuum levels to blank-off with a single stage unit.
Standard dry vacuum exhausters are limited to approximately 16” Hg vacuum because operation at higher vacuum levels can cause extreme discharge temperatures resulting in casing and impeller distortion and possible failure. The RAM™ vacuum exhauster’s
integral cooling design eliminates the problems caused by high discharge temperatures at vacuum levels beyond 16” Hg.

• Single stage operation to 27" HGV
• No valves, vanes or Teflon rings to wear
• Allowy steel timing gears
• Cylindrical roller bearings
• Piston ring air seals
• Lip-type oil seals (optional mechanical seal)
• Splash oil lubrication
• Horizontal and vertical configurations available
• Vacuum to 24" Hg (813 mbar)
• Flows 180 to 2431 cfm (306 to 4130 m3/hr)

Specification Sheet

RAM-VJ Blowers
Frames 817J, thru 832J

ROOTS™ WHISPAIR™ water-sealed vacuum exhausters are heavy-duty units designed with integral-shaft ductile iron impellers. WHISPAIR vacuum exhausters reduce noise and power loss by utilizing an exclusive wrap-around plenum and proprietary WHISPAIR™ jet to control pressure equalization – feeding backflow in the direction of impeller movement, thereby aiding rotation. The headplates, one-piece casing and end covers are grey iron. Carburized and ground alloy steel spur timing gears are taper mounted on the shafts, secured
with a locknut. Cylindrical roller bearings are used.

• Low noise level, less operating power required
• Improved volumetric efficiency and reduced operating temperatures
• Allowy steel timing gears
• Cylindrical roller bearings
• Piston ring air seals
• Lip-type oil seals (optional mechanical seal)
• Splash oil lubrication
• Horizontal and vertical configurations available
• Vacuum to 24" Hg (813 mbar)
• Flows 180 to 2431 cfm (306 to 4130 m3/hr)

Specification Sheet

RAM-DPJ Blowers
Frames 406 DPJ

The ROOTS™ RAM™-DPJ WHISPAIR™ rotary blower has an exclusive discharge jet plenum design which allows cool, pressurized system air to flow into the cylinder. This unique design permits operation at high pressure levels with a single stage unit. The RAM high pressure blower is designed for continuous operation at discharge pressures up to 30 psig. It has no valves, vanes or Teflon rings. Clean, dry discharge air or gas provides usable heat for
your process.

• Single stage operation to 30 psig
• No valves, vanes or Teflon rings to wear
• Allowy steel timing gears
• Cylindrical roller bearings
• Piston ring air seals
• Lip-type oil seals (optional mechanical seal)
• Splash oil lubrication
• Horizontal and vertical configurations available
• Pressure to 30 psig (2068 mbar)
• Flows to 545 cfm (926 m3/hr)

Specification Sheet

The ROOTS™ RAM X™ tri-lobe positive displacement blower has been designed to incorporate the latest technology for reduced noise and vibration and minimal downstream pulse. This series is based upon the field operation success of ROOTS RAM™ blower series and features state-of-the-art engineering based on tri-lobe principles originally designed by Roots.

RAM X tri-lobe rotary blowers are heavy-duty units with high strength integral-shaft ductile iron impellers designed for maximum efficiency. The blowers feature ROOTS WHISPAIR™ discharge design which, when combined with tri-lobe impellers, delivers quieter operation than conventional tri-lobe blowers.

• Tri-lobe impellers for less vibration and minimal downstream pulse

• WHISPAIR discharge design combined withtri-lobe impellers for quieter operation than conventional tri-lobe blowers

• Carburized and ground alloy steel timing gears for long life and consistent performance

• Cylindrical roller bearings for longer bearing life

• Piston ring seals for less air leakage

• Splash lubrication from oil sumps with sight glasses on each end for easy maintenance

• Detachable feet and drive shaft extension to adapt to horizontal or vertical configuration

Specification Sheet