ACF-103 - page 4

INLET
VOLUME
CONTROL
When the fan is used for varying
or partial load applications, the
Inlet Volume Control (IVC) provides
precise air control andmore effi-
cient operation. Adjustable guide
vanes pre-spin the incoming air in
the same rotation as thewheel to
produce the desired volume of air
at the exact pressure.
Vanes aremounted entirelywithin
the inlet cone. Automatic control is
achieved by adding an electric or
pneumatic actuator. The IVC is suit-
able for manual operation to 650°F
and automatic operation to 350°F.
OUTLET DAMPERS
Dampers offer an economical
alternative to IVCs. However, they
require substantiallymore horse-
power at reduced air volume.
Dampers for all fan classes have
double thickness airfoil blades,
and are availablewith parallel or
opposed blade rotating louvres.
Dampers have punched flanges
on both ends and are suitable for
manual or automatic operation. A
matching punched flanged outlet
is required for mounting. Alternate
construction is available for dirty
or high temperature applications.
PUNCHED FLANGED
INLET/OUTLET
Formed ring inlet is punched for
inlet duct connection. Heavy
angle flange can bewelded
to the outlet, either
punched or unpunched.
SHAFT AND
BEARINGGUARD
The expandedmetal guard
encloses the shaft and bearings.
For easier lubrication, extended
grease fittings are recommended.
4
SHAFT COOLER
ANDGUARD
Cast aluminum coolingwheel with
expandedmetal guard raises the
allowable temperature limit for
arrangement 1or 9 fans from 300°F
to 650°F. Adding a shaft seal on ar-
rangement 1 fans extends the limit
to 800°F. Refer to page 6 for high
temperature/RPM deration factors.
SHAFT SEAL
A non-contact seal mounted
between steel plates reduces leak-
age through the shaft opening in
the housing.
INLET BOX
The bolt-on inlet box simplifies
ductwork connectionwhen a
straight horizontal connection is
not feasible. Assures dependable
fan performancewhen a
sharp turn is required
at the fan inlet.
PerformanceOptions
1,2,3 5,6,7,8
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