Air Handling Units and HVAC (Heating, Ventilating and Air Conditioning) systems incorporate fans, such as plenum fans and duct fans, to move air in buildings and enclosed environments.
Material handling and pneumatic systems contain fans used to propel granular materials such as plastic resin pellets, grains, and powders. Such systems move these materials between storage containers and to production equipment.
Fans for personnel and workspace use, such as Mancoolers, box fans and pedestal fans, are especially advantageous where a welcome draft of air is required to give comfort to personnel in hot locations.
Pressure blowers (or pressurization blowers) are used in applications, such as positive pressure building (where entry of outside air or dust is detrimental) and cleaning drying equipment, where a positive pressure is required downstream from the fan. Typically, the blower resides in an enclosure designed to give a common mounting platform for a blower and its electric motor. The enclosure can be mounted on vibration isolators and maybe referred to as a unitary base or vibration isolation base.
Process cooling fans are designed for use in large scale industrial process equipment such as heat exchangers, cooling towers, process dryers, and where high throughput over long durations in challenging environments is required.
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Bare fans and blowers consist of products that include such items as the fan blade, bearings, mountings, and enclosures. Bare fans and blowers require a power system, such as an electric motor, and control system to be provided by the user.
Packaged fans and blowers consist of fully functional products that only require electricity or similar power resource for operation.
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Induced draft refers to the movement of air by means of an induced partial vacuum. Induced draft fans "draw" air.
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Axial fans include designs where the fan blade circulates parallel to the air flow. Such products include propeller fans, vaneaxial and tubeaxial fans.
Bi-lobal and tri-lobal fans consist of two co-rotating, serpentine shafts that mesh to move air and gases in a controlled manner. The shafts mesh tightly such that back flow is prevented. Such products are often used to recirculate gases in process equipment where environmental consistency is mandated.
Centrifugal fans include designs where the fan blade rotates perpendicular to the air flow. These products include a myriad of blade configurations including forward curve, backward curve, air foil, backward incline, radial tip, etc.
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Fan / blower is powered by belts and sheaves or pulleys. Typically one sheave will be mounted on an electric motor and the other on the fan / blower, and the two are connected by belts.
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A numerical description of the class of construction for the fan. There are three classes recognized by the Air Movement and Control Association (AMCA). Typically, the larger the class number, the greater minimum performance and price as well.
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Motor housing is explosion proof to withstand an explosion of a specified gas or vapor which may occur within it or the housing is designed to prevent the ignition of the specified gas or vapor surrounding the machine by sparks which may occur within the machine casing. Sometimes abbreviated as TEFC-XP (Totally Enclosed Fan Cooled, Explosion Proof).
Fan has mounting brackets or flanges specifically for wall installation or exhaust.
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Fan / blower designed for moving granular material (grain, pellets, and powders) and other particulate matter (soot, contaminants, and light solids) pneumatically.
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The fan is constructed primarily from composite materials. Composite materials are often fiber reinforced plastic or fiberglass. Fiberglass is a composite material made by embedding glass fibers in a polymer matrix.
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