Specification Sheet

147
MODELS STXD & STXB
DIRECT DRIVE & BELT DRIVE CENTRIFUGAL UPBLAST ROOF EXHAUSTERS
OPTIONS/ACCESSORIES
Solid State Speed Control (STXD): S&P’s solid state control is matched to the motor and blower
wheel to allow continuous reduction in performance allowing adjustments of airow for system balancing.
CFM is reduced in direct proportion to motor speed reduction. Speed control is available for 115 or
230 volt single phase. Exhauster performance can be controlled from the ventilated area.
Automatic Belt Tensioner (STXB): Available on
sizes 8-16, The Automatic Belt Tensioners eliminate
the need for regular manual retensioning of drives,
and the risk of inadvertently over-tensioning drive
components is avoided and overall drive operating
efciency is enhanced. Benets include reduction
in startup and maintenance costs, increased belt
life, increased drive efciency, and ensure drive
components do not snag obstructions.
Roof Curb: Prefabricated heavy-gauge galvanized steel, welded construction, 12” high (other
heights are also available) with 1-1/2” wood nailer. Assures perfect t of exhauster to roof
opening. Options include burglar bars, single or double pitch construction and hinged curbs
for easy duct access.
Common Curb: Designed to allow both the supply fan and exhaust fan to be mounted on the same curb. This
curb requires only one roof opening and speeds installation time.
Motor Operated Damper: Motor operated aluminum damper for positive closure against
backdraft. (Not for UL762 use).
Automatic Damper: Automatic aluminum damper for ease in installation and effective
backdraft protection. (Not for UL762 use).
Grease Grabber or Aluminum Grease Trough: Trap designed for fast and inexpensive replacement. Grease
collects in a container for safe and sanitary disposal. Keeps roof clean with proper use.
Curb Hinge Arrangement: The curb hinge arrangement provides easy access to the exhaust fan, backdraft
damper, and duct for servicing and cleaning.
Birdscreen: To protect the fan from birds and other large objects.
Insect Screen: Helps prevent insects, snow, airborne mist or water droplets from entering.
Special Coatings: Powered roof exhausters often require special coatings for protective and decorative
purposes. Available coatings include: Synthetic Resin, Epoxy, and Heresite (air-dried phenolic). Contact
your
representative or the factory for more information on available coatings and colors.
MODELS STXD & STXB
DIRECT DRIVE & BELT DRIVE CENTRIFUGAL UPBLAST ROOF EXHAUSTERS
Motor Pulley
Fan Pulley
Belt Tensioner Arm
Belt Tensioner Pulley
Belt Tensioner Bracket
Motor Bracket