Open inlets, slip fit inlets and punched flanged inlets are
available to meet installation requirements.
Structural angle assembly matches fan inlet or outlet
flanges and allows fastening of ductwork for a flange-to-
Designed to control air flow at low initial cost, outlet
dampers (shown below) have punched flanges on both
ends to simplify fan and duct connections. Parallel blades
are standard with opposed blades available. Air volume is
controlled manually or automatically by electric or pneumatic
Inlet Volume Control
For varying or partial load applications, Chicago’s Inlet
Volume Control (IVC) provides precise air control and
greater efficiency than
an outlet damper. IVC
is nested within the
inlet cone. Air volume is
controlled manually or
automatically by electric
or pneumatic actuator.
Bolt-on box (shown at
right) simplifies duct
connection when a hor-
izontal connection is
impractical. Assures fan
performance when a
sharp turn is required
at the fan inlet.
Available on Sizes 12-1/4 and 13-1/2, Class I only.
Temperatures to 200°F. Aluminum wheel standard on
Sizes 8-3/4 and 10.
Steel wire screen mounts within the inlet cone or outside
the inlet vanes when furnished with IVC.
Split steel or aluminum plate is designed to reduce leakage
through the drive side shaft opening. Leak-resistant contact
shaft seals are also available. Shaft seals are not gas tight.
For temperature applications over 300°F, an aluminum
cooling wheel is required. Maximum temperature is 650°F.
Shaft and Bearing Guard
The metal guard encloses the shaft and bearings. For eas-
ier lubrication, extended grease fittings are recommended.
Extended Grease Fittings
For easier lubrication of belt drive fans, fittings are
mounted on the bearing support gussets and lube lines
extended to the bearings.
The guard is fully enclosed with a removable cover.
The flush mounted door features quick opening clamps and
gasket. Bolted door or insulated plug type is also available.
A 1-1/2" half coupling is welded to the lowest point of
the housing. Available with or without drain plug.
Belt drive fan and adjustable motor base are welded onto
a unitary base of structural steel channel. Vibration iso-
lators also available. (Refer to page 18 for dimensions.)
Vibration isolation T-rails are mounted on anti-vibration
springs to isolate all rotating components.
Spark Resistant Construction
AMCA Type B and C spark resistant construction. Maximum
temperature is 200°F for Type B and 650°F for Type C.
Numerous special paint and corrosion resistant coatings
are available to meet the most stringent requirements.