Specification Sheet

S-5597 rev.0608
SPECIFICATIONS
ROOTS
™
VJ WHISPAIR
™
Water-Sealed Vacuum Exhauster
Frames 817J thru 832J
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 move-
ment 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 seals, hydrodynamic drive shaft seal
7. Splash oil lubrication
8. Horizontal and vertical configurations available
BASIC BLOWER DESCRIPTION
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.
Piston rings reduce air leakage through the shaft
openings in the headplates, and lip-type oil seals prevent
lubricant from entering the air chamber. WHISPAIR
™
vacuum exhausters incorporate splash oil lubrication at
both ends of the units. A hydrodynamic seal on the drive
shaft prevents shaft seal oil leaks.
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 exhausters.
An inlet spray nozzle and seal water flow meter are
supplied for water injection.
OPERATING PRINCIPLE
WARRANTY PERIOD
Twelve (12) months from date of original unit start-up or
18 months from date of original shipment, whichever
occurs first.