GE Roots Tri-Nado Tri-Lobe Blowers for Truck Mounting Brochure

GE General Industrial Brochure - Roots Tri-Nado Tri-Lobe Blowers for Truck Mounting.
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GE Oil & Gas

Roots* Rotary Lobe Positive 
Displacement Blowers
Universal RAI* Series | RAM* Series | RCS* Series | DVJ and DPJ Series  

 Bi-Lobe  Principle

URAI, URAI-DSL, URAI-G, RAM, RCS Series

Two figure-eight lobe impellers mounted on parallel 
shafts rotate in opposite directions. As each impeller 
passes the blower inlet, it traps a finite volume of air and 
carries it around the case to the blower outlet, where 
the air is discharged. With constant speed operation, the 
displaced volume is essentially the same regardless of 
pressure, temperature or barometric pressure. Timing 
gears control the relative position of the impellers to 
each other and maintain small but finite clearances. 
This allows operation without lubrication being required 
inside the lobe cavity.

Operating Principles

 WHISPAIR* Principle

URAI-J, URAI-J DSL, RAM-J, RAM-GJ, RAM-VJ, RCS-J

Incoming air is trapped by the impellers. Simultaneously, 
pressurized air (right) is being discharged. As the impeller 
passes the wrap-around flange, the Whispair jet 
equalizes pressure between trapped air and discharge 
area, aiding impeller movement and reducing power. 
Impellers move air into the discharge area. Backflow is 
controlled, resulting in reduction of noise and pulsation 
relative to conventional blowers.

 DVJ/DPJ  Principle

2504 DVJ, RAM DVJ, 721 DVJ, 406 DPJ

Incoming air is trapped between the impellers. 
Simultaneously, pressurized air is being discharged. 
As the impeller passes the jet plenum, cooled, pressurized 
air flows into the space between the impeller and cylinder. 
This cools the trapped air, helps control thermal growth 
and allows higher pressure ratios. The trapped air is then 
moved into the discharge flange. Backflow is reduced, 
resulting in lower operating noise level and reduced 
shock loading on the equipment.

 Warranty
Proven designs, manufacturing and material provide 
assurance for superior operation. Local, factory trained, 
service centers offer timely response to your unique 
needs. Roots products are sold subject to GE’s general 
terms of sale and warranty policy; contact your nearest 
GE office for more information.

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