Specification Sheet

379
CONSTRUCTION/SPECIFICATION CHECKLIST
Panel Assembly
• Heavy-gauge G90 galvanized steel panel, size 24-72.
• One piece venturi for maximum efciency and strength.
• All welded support structure of schedule 40 galvanized pipe (minimum).
• Motor/bearing plates of minimum 10 gauge galvanized steel.
Windband/Buttery Dampers
• Heavy-gauge galvanized steel windband.
• Steel dampers standard (except on sizes 48-72).
• Translucent berglass dampers available on all sizes (standard on sizes 48-72).
• Galvanized rain channel drains water from damper area to roof.
• Galvanized damper shaft rotates in bronze bushing.
Propeller
• Two, three, four or six airfoil aluminum blades.
• Steel hub plate with steel taper lock bushing.
• Adjustable pitch for optimum efciency.
• Die formed steel blades are optional where required.
Drives
• Shielded from airstream by galvanized steel enclosure.
• Sized for minimum 150% of drive horsepower.
• Single belt adjustable pitch sheaves through 3HP.
• Two belt xed pitch sheaves through 10HP.
• Adjustable pitch sheaves are optional above 3HP.
• Adjustable tension rods for belt adjustment.
• Nonstatic oil resistant v-belts.
• Keyed, turned, ground and polished shafts.
Bearings
• Bearings designed for minimum 200,000 hour life, L50.
• Cast iron self-aligning pillow block ball bearings.
• Bearings are sealed, prelubricated with relube ttings.
Motors
• Located outside airstream under weather cover.
• Brands are nationally recognized and locally serviced.
• Open drip-proof construction is standard.
• High-efciency, explosion proof, totally enclosed fan cooled (TEFC) and corrosion duty motors can be
specied.
Certications
• cULus 705 listed power roof ventilator assures electrical reliability (optional).
MODEL UBRD
REMOTE DRIVE UPBLAST PROPELLER ROOF EXHAUSTER