MODELS UBB (belt drive) & UBX
(direct drive)
UPBLAST PROPELLER ROOF EXHAUSTERS
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técnicas del producto.
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MODELS UBB & UBX
MODEL UBRD
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Application
Models UBB and UBX are high capacity roof mounted exhausters rated from 5,900 to 78,000 CFM. They are general ventilation units designed to economically remove large volumes of air, fumes and vapors from commercial and industrial buildings such as warehouses, manufacturing and assembly
plants, distribution centers, chemical plants, foundries and paper mills.
Straight-through air flow design results in maximum exhaust efficiency. During operation, high air flow velocity opens butterfly dampers and prevents rain or snow from entering. Dampers close and cover the
venturi opening when unit is not in use.
The roof mounted location eliminates interference with processes and equipment inside the building. It also permits locating the exhauster over a source of heated or contaminated air, allowing direct upward
venting to the outside, unlike wall mounted exhausters which may move contaminated air through adjacent work spaces.
Belt drive units usually operate more quietly and afford easier performance adjustments, while direct drive models require less maintenance.
Construction/Specification Checklist
Panel Assembly
• Heavy-gauge G90 galvanized steel panel on all sizes.
• One piece venturi for maximum efficiency.
• All welded support structure of schedule 40 galvanized pipe.
• Motor/bearing plates of minimum 10 gauge galvanized steel.
Windband/Butterfly Dampers
• Heavy-gauge galvanized steel windband.
• Steel dampers standard (except on sizes 48-72).
• Translucent fiberglass 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 efficiency.
• Die formed steel blades are optional where required.
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Drives (belt drive models)
• Sized for minimum 150% of drive horsepower.
• Single belt adjustable pitch sheaves through 3HP.
• Two belt fixed pitch sheaves through 10HP.
• Three belt fixed 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 fittings.
Motors
• Brands are nationally recognized and locally serviced.
• Open drip-proof construction is standard.
• High-efficiency, explosion proof, totally enclosed fan cooled (TEFC) and corrosion duty motors can be specified.
Certifications
• AMCA Air & Sound Licensed.
• UL-705 Listed Power Roof Ventilator assures electrical reliability (optional).
Options/Accessories
Roof Curb: Prefabricated heavy-gauge galvanized steel, welded construction, 8" high with 1-1/2" treated wood nailer. Options include
burglar bars, single and double pitch construction, and additional curb heights.
Disconnect Switch: Nonfused safety disconnects are available for all motor sizes in rain-tight or open enclosures. Explosion proof, Nema 4 and 4X are also available.
Magnetic Latches: Help reduce damper chatter when the units are not in operation.
Heat/Smoke Vent: Opens damper doors when temperature exceeds 165˚F. Allows heat and smoke to escape building without use of fan
power.
Outlet Guard: 1/2" x 1" wire mesh guard will prevent birds and other objects from entering the fan.
Extended Grease Lines: Extended grease lines allow motor and/or fan bearings to be relubricated from the exterior.
Aluminum Construction: Optional aluminum construction available on windbands, curb caps, panel and blades.
Epoxy Finish: For use in all alkaline type atmosphere (exceptions are acetic and nitric acids). Epoxy forms an excellent hard, heavy film barrier against chemical attack as well as physical damage from direct impact and abrasion.
Eisenheiss Finish: For preventing corrosion from acids, alkalis, fumes, steam and condensation. |
