CHARLOTTE, NC – Rosenberg’s backward curved motorized impellers in sizes from 8.86 inches to 24.8 inches (225 to 630mm) are a perfect fit for supply/evaporator or exhaust fans in railway passenger or driver cabins. Specified as a fan assembly (DKHM models) or as a motorized impeller without inlet cone (DKHR models), they feature a high-performance free-running impeller design for more efficient air movement.

Rosenberg is the world’s largest supplier of motorized impellers to the rail transportation industry. Rosenberg DKHM and DKHR models offer HVAC design engineers optimal performance with no drive belt and no external motor or shaft. Their compact footprint, as small as 8.94 x 6.67, makes them an excellent choice for high-efficiency evaporator applications.

Available in sizes 8.86, 9.84, 11, 12.40, 14, 15.75, 17.72, 19.60, 22.05, and 24.80 inches of diameter (225, 250, 280, 315, 355, 400, 450, 500, 560, and 630 mm), they can provide air movement up to 9,000 cfm. Airflow, power, rotational speeds, noise level, overall dimensions and finish can be specified to meet the exact requirements of the application.

Their rugged external rotor motors are IP54-rated. 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. Sealed or ceramic ball bearings, motor encapsulation, halogen free cables, salt fog reinforcement, or compatibility with VFD operations are also options for Railway Applications.

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.

In addition to a wide selection of standard products, Rosenberg’s engineering and manufacturing specialists also offer application assistance and work directly with customers to develop customized air movement solutions.

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