Unlike flange heaters, Finned Electric heating elements are indicated and suitable for the drying process of products made in the tanning sector.

They are inserted inside the drying tunnel to conclude the final treatment of the leather tanning process.

The Finned Electric heating elements produced by Reart are sheathed heating elements which are used, thanks to their technology, for industrial processes and various applications such as air and gas in general, to heat or maintain the temperature of the process gas.

The electric heaters are finned to favour and improve the heat exchange between the heater and the fluid in the processes with forced ventilation. Given their technology, they can also be installed directly in the rooms to be heated with process conditions in air or static gas.

In many applications, they are designed to be inserted in ventilation ducts or air conditioning systems (called Electric Coils) and are crossed directly by the process air or gas.

APPLICATIONS

These types of heaters are widely used for different heating processes for heating temperatures up to 450° C:

• in the heating of outdoor environments
• in drying plants
• in air conditioning systems
• in forced ventilation systems

General technical data

They are built with resistance wire in Ni Cr 80/20, positioned in the centre of a metal tube and insulated with high quality magnesium oxide (MgO), compacted by the cold rolling process.

The Finned Electric heating elements are available with standard diameters 8.5 -10-15 with the following materials of the armor of the heater:

• Aisi 321 stainless steel
• Aisi 316L stainless steel – Aisi 309

Finning external to the heating element to improve the heat exchange efficiency in Aisi304 stainless steel with a height of 5 mm or 8.5 mm.

The electric power for the finned electric heaters is normally designed with:

• specific power of 2÷4 W/cm2 for systems with low flow rate of the process gas.
• specific powers of 6÷12 W/cm2 for systems with high flow rate of the process gas.

Geometry and dimensioning of the finned electrical heaters are based on the usable space available on the process, otherwise on request or customer specification. They can be bent with a “U” or “M” geometry, with a development length up to 5.5 meters.

All Finned heating elements can be equipped with different accessories such as:

• Electrical connections with threaded terminal
• Threaded bushings for fixing the electrical heater to the process
• Flanges for fixing to the process according to customer drawing

Customized executions based on the customer’s design and request are available.