Rosenberg 560, 630 and 710 mm Backward Curved Fans

Rosenberg's wide range of larger backward curved fans with motorized impellers, featured at AHR EXPO 2010, has become extremely popular in high-efficiency HVAC evaporator designs. With several models to choose from in sizes from 22 to 28 inches, Rosenberg backward curved fans offer engineers more design flexibility and optimal performance.

Available in sizes 22, 25 and 28 inches (560, 630 and 710 mm), the fans deliver up to five inches of static pressure or a maximum air movement capacity of 11,450 CFM in a compact, space-saving package. Airflow, power, rotational speeds, noise level, overall dimensions and finish can be specified to meet the requirements of the application.

These rugged IP54-rated backward curved units are available with or without housings. The concave backward curved impellers are made of aluminum. Impellers are mounted directly to the rotor of the asynchronous external rotor motor, and are superbly balanced together with the rotor to ensure long life, quiet operation, and low vibrations.

Rosenberg backward curved fans are 100 percent speed controllable. Thermal contacts provide standard motor protection. Insulation is to Class F and side cable connection is standard.

The fans can be specified with or without electronic commutation. Electronically commutated (EC) fans feature standard AC input power, and extended-life, low-temperature brushless DC motors that are controlled by maintenance-free electronic circuitry. Because of reduced mechanical content, electronically commutated (EC) Rosenberg fan motors run cooler and quieter.

In addition to a wide selection of standard backward curved products, Rosenberg's engineering and manufacturing specialists also offer application assistance and work directly with customers to provide customized solutions to their air movement problems. They are skilled at producing fans that match customers' unique needs such as special finishes, voltages or frequencies.

The Rosenberg family of companies employs more than 1,200 individuals worldwide. Rosenberg USA is headquartered just outside Charlotte in Indian Trail, N.C. For more information, or to place an order, contact Rosenberg USA by phone at (704) 893-0883; fax (704) 882-0755 or e-mail sales@rosenbergusa.com.