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issue: October 2004 APPLIANCE Magazine

Technology Report
Tube Axial Fan

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Part of the company’s multi-line family of axial, centrifugal, and mixed flow in-line fans, Continental Fan Manufacturing, Inc.’s AID Tube Axial Fan is said to offer performance and efficiency within a single unit.

Continental Fan Manufacturing Inc.’s (Buffalo, NY, U.S.) AID Tube Axial Fan features an adjustable pitch axial impeller with a computerized fan selection program. The air-moving device is available in custom diameters and features a capacity of 100,000 cfm.

Available in 12-in to 78-in diam, the tube axial fan features an ELTA-adjustable pitch axial impeller said to function with precise performance matching. According to Jud Alexander, Continental Fan Manufacturing engineering and OEM sales manager, the AID tubular axial flow fan is a direct-drive fan that features 15 different pitch angle settings. In addition, the fan is also available in six different hub sizes and can be supplied in a number of different blade configurations.

“The flexibility of the impeller provides the versatility required to match the customers’ performance specifications with a direct-drive fan,” Mr. Alexander says. “Advantages of direct-drive fans include a space-saving package, easy maintenance (with no bearings, belts, and sheaves to maintain), and less component parts that generally lead to failure over time.”

According to Mr. Alexander, the impeller is factory-set and is available with cast aluminum blades or glass-reinforced polypropylene blades. Hub size, blade length, and blade angle are set according to the particular application and are said to help provide the air-moving device’s efficiency. “Multiple hub-to-blade ratios offer a cost-effective means to operate an AID at higher operating pressures—often times out-performing the vane axial fan type at a given performance requirement,” Mr. Alexander tells APPLIANCE.

In addition, the AID tube axial fan features a computerized fan selection program that, according to the company, analyzes airflow, pressure, and sound requirements to develop selections for a particular application. “The selections are presented to the user starting with the highest efficiency fan,” Mr. Alexander explains. “The user evaluates the selections against the application and makes the final choice.”

The results of the program provide users with the information needed regarding performance, size, material type, and blade angle setting to produce the impeller. This, according to Mr. Alexander, is perhaps the largest benefit the tube axial device offers. “The versatility of the impeller provides selection capabilities that exceed the capabilities of a direct-drive, fixed-pitch product,” he says.


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