Specification Sheet

383
Bearings & Shaft
200,000 hour bearings
and turned, ground and
polished shafting.
Drives
Variable pitch
through 3HP and
xed pitch sheaves
5HP and larger. High
temperature fan uses
minimum dual groove
sheaves.
Blades
Statically and dynamically
balanced aluminum airfoil
extrusion or polypropylene
propellers for optimum
performance. High temperatures
fans use steel blades.
Curb Cap
Heavy-gauge galvanize with
integral inlet.
Damper Bearings
Damper doors pivot on a
galvanized steel shaft rotating
in two bronze bushings.
Factory Run & Tested
Assures dependable operation.
Rain Channel
Galvanized metal
channel section drains
water out of the fan area
when the damper doors
are closed.
Lift Points
For easy, safe roof placement.
Motor Slide Base
For ease of belt
adjustment.
Windband
Heavy-gauge
galvanized steel.
Buttery Dampers
Available in steel or berglass.
Motors
ODP, 2-speed, TEFC,
corrosion duty, or
explosion proof.
CONSTRUCTION FEATURES AND OPTIONS
MODEL TUB
TUBEAXIAL UPBLAST PROPELLER ROOF EXHAUSTER