Specification Sheet

373
CONSTRUCTION/SPECIFICATION CHECKLIST
Panel Assembly
• Heavy-gauge G90 galvanized steel panel on all sizes.
• One piece venturi for maximum efciency.
• All welded support structure of schedule 40 galvanized pipe.
• 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 (belt drive models)
• Sized for minimum 150% of drive horsepower.
• Single belt adjustable pitch sheaves through 3HP.
• Two belt xed pitch sheaves through 10HP.
• Three belt xed pitch sheaves on 15 HP.
• 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
• 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
• AMCA Air & Sound Licensed.
• cULus 705 listed power roof ventilator assures electrical reliability (optional). Excludes UBX.
MODELS UBB & UBX
UPBLAST PROPELLER ROOF EXHAUSTERS