Chicago’s traditional fixed housing Industrial Centrifugal Fans
are available as a basic Arrangement 1 in sizes 11 thru 41 or
self-contained Arrangement 9 in sizes 11 thru 37. The fans
are built in constructions classes 2 thru 4 to meet any duty.
With the Arrangement 1 fan, two heavy-duty ball or roller
bearing pillow blocks are mounted on a pedestal attached to
the housing. The fan shaft extends over the base and is keyed
for mounting the drive sheave. Maximum temperature for the
Arrangement 1 is 400°F, or 800°F with optional shaft cooling
The Arrangement 9 is a compact, space-saving unit with
adjustable motor slide base welded to the bearing pedestal.
Maximum temperature for the Arrangement 9 is 400°F or
650°F with shaft cooling wheel.
Flanged side sheets provide extra strength to an already
rigid configuration. SQI fans come standard with unpunched
flanged outlet and slip fit inlet.
Maximum temperature with either wheel is 650°F. Shafts run in
two individual grease lubricated ball bearings mounted on a
bolted removable bracket for easier service.
Chicago’s SQI square design fans are available in Arrangements
1 and 9. They are also available as “packaged” fans with motor,
drive and accessories installed, shipped ready to run.
The versatile Chicago
Square Fan design allows
the housing to be posi-
tioned on any of four sides
and the fan to be run in
any of eight discharge
positions. Motor base has
mounting holes for all
The basic SQI fan
with rugged continuously
Packaged SQI fans are
built with specified
ready to run
Many critical processing installations
require stainless steel and alternate