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Product Features

All products feature these standard materials of construction. Alternate materials are available upon request.

Tubes & Headers------------------------Copper
Oil Turbulators-------------------------Aluminum
Tube Fins------------------------------Aluminum
Cabinets & Louvers-------------Galvanized Steel
Fan-----------------------------------------Steel
Fan Guard----------------------Steel Zinc Plated
Frame-----------------Steel with Powder Coated

Design Pressure-------------------------300 PSI
Design Temperature-----------------------300ºF

All units are pneumatically tested and are available with ASME "U" OR "UM" STAMP when required.

Fan driven units are shipped with TEFC 230/460V/3PH electric motors suitable for outdoor applications. Alternate electric motor options are available upon request.

External fin coatings and galvanizing are available for those applications requiring this feature. Consult the factory for alternate design conditions.
 

Nelson SPIRO-FIN™ Turbulator

The Nelson SPIRO-FINTM Turbulator is a device which is placed inside the tubes of a heat exchanger to increase heat transfer efficiency from a viscous fluid which is intended to be cooled. The turbulators are comprised of  an aluminum extrusion which has been twisted in the longitudinal dimension. The extrusions are twisted in order to increase the mixing of the fluid as it follows the turbulator and therefore transform the flow conditions in the boundary layer from laminar to turbulent flow. Without the turbulator the flow would be laminar throughout. Turbulent flow is characterized by a marked increase in heat transfer over laminar flow.
 

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