Specification Sheet

SPECIFICATIONS
ROOTS
™
RAM
™
-VJ WHISPAIR
™
Water-Sealed Vacuum Exhausters
Frames 406J thru 624J
Incoming air is trapped by the impellers. Simultaneously, pressurized air
(right) is being discharged. As the lower impeller passes wrap-around flange,
Whispair jet equalizes pressure between trapped air and discharge area,
aiding impeller movement and reducing power. Impellers move air into the
discharge area (right). Backflow is controlled, resulting in reduction of noise
relative to conventional blowers.
DESIGN AND CONSTRUCTION FEATURES
1. Low noise level, less operating power required
2. Improved volumetric efficiency & reduced
operating temperatures
3. Alloy steel timing gears
4. Cylindrical roller bearings
5. Piston ring air seals
6. Lip-type oil and shaft seals
7. Splash oil lubrication
8. Horizontal and vertical configurations available
RAM
TM
stands for Reliability, Availability and
Maintainability. Today, more than ever, ROOTS is
committed to supplying our customers with reliable
products manufactured with state-of-the-art CNC
machine tools. Production and inventory are being
scheduled and controlled to ensure these units will be
available when you need them. Design improvements
such as repositionable rugged steel mounting feet and
die-cast aluminum drive end covers and gear covers
help to reduce installation costs and make normal
maintenance easier.
BASIC BLOWER DESCRIPTION
ROOTS™ RAM™ 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 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.
Piston rings reduce air leakage through the shaft
openings in the headplates, and lip-type oil seals
prevent lubricant from entering the air chamber.
RAM™ WHISPAIR™ vacuum exhausters incorporate
splash oil lubrication at both ends of the units. A lip
seal on the drive shaft prevents shaft seal oil leaks.
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
vacuum exhausters, and the left or right shaft can be
extended for drive on bottom outlet vacuum pumps.
An inlet spray nozzle and seal water flow meter are
supplied for water injection.
OPERATING PRINCIPLE
S-59F97 rev.0608