Design SQI is standard with un-
punched flanged outlet and slip fit
inlet, both available with punched
flanges. Fixed housing D/16 fans
are standard with punched flanged
outlet and slip fit inlet, available
with unpunched flanged outlet
and punched flanged inlet.
Dampers for all fan classes are suit-
able for manual or automatic oper-
ation with blades perpendicular to
the shaft. Dampers are furnished
in standard duty to 600°F, with
alternate construction available for
high temperature applications to
Three types – flush mounted with
quick opening tension clamps;
bolted for positive sealing; plug
type for insulated applications.
Neoprene gasket to 300°F and
asbestos-free gasket to 800°F.
Cooling wheel raises the allowable
temperature limit for arrangement
1 or 9 fans from 300°F to 650°F.
Adding a shaft seal on arrange-
ment 1 fans extends the limit to
800°F. Includes expanded metal
Fixed housing fans sizes 23-37 can
be furnished with flanged horizon-
tal split housings. Split housings
are standard on size 41.
AMCA Type C spark resistant con-
struction substitutes an aluminum
inlet cone and adds a drive side
aluminum buffing tube between
the wheel, shaft and housing.
Available with all classes and sizes,
arrangement 1 and 9. Maximum
temperature is 600°F. Requires
Fan and adjustable motor base are
welded onto a common base of
continuously welded structural
The bolt-on inlet box simplifies
ductwork connection when a
straight horizontal connection is
not feasible. Assures dependable
fan performance when a sharp
turn is required at the fan inlet.
Accommodates inlet box damper.