• Incoloy © Tubular Elements
  
Tubular heaters can be formed, arched, casted or rolled, straight. Tubulars are especially designed to heat air and solids, for example, heating rooms, forming plexiglass for radiant heating.

• Finned Tubulars
  
For use in forced circulation, air or gas heating systems such as ducts, fan forced electric heaters, recirculating ovens, loading resistors, etc.

HEATING BY :

Convection

Immersion

Conduction

Radiation

Volton tubular heaters can be shaped to almost any configuration in our factory. Please check the following examples. When ordering your tubulars, please include a drawing or sample indicating the exact dimensions.


THREADED FITTINGS

Threaded fittings can be brazed or welded to the element’s cold sections. These fittings provide a leak-tight joint in applications where the heater is installed in open tanks or vessels. Fittings are available in brass, steel or stainless.

MOUNTING BRACKETS

Standard mounting brackets can be factory crimped to elements to facilitate installation. Special brackets are available for high volume orders.

ELEMENT CLAMPS

These two-piece stainless steel clamps can be used as element standoffs in ovens or tanks.

Our in-stock items include tubulars in various dimensions and strengths.

Finned heaters are normally used for force convection heating with outlet air temperatures of 300°C brackette (592°F) or less. Steel-finned heaters are standard with surface temperatures limited to about 425°C (797°F) compared to 815°C (1500°F) for an alloy sheathed, non-finned heater. If a high surface temperature and the high radiation heat transfer that accompanied it is not detrimental to the remaining system components, a finned heater may prove to be the more economical choice.

When ordering, please make sure to indicate the types of endings required.


Some applications require stainless steel materials for corrosion resistance. The most efficient finned heaters are made with a steel sheath and fins. Keep in mind that stainless heaters with stainless fins are very inefficient since the heat transfer rate of stainless is less than one quarter of that for steel.


FIN EFFICIENCY

Steel fins are spirally wound over the heating element and then metallurgically bonded by furnace brazing leaving negligible thermal resistance at the joint. Brazed fins transfer heat at about double the efficiency of unbrazed designs.

Various combinations of fin thickness, width and pitch are available. Fin combinations which give higher heat transfer areas do not necessarily transfer heat more effectively than similar elements with a bit less area. Fin efficiency is lower for wide fins, thin fins or fins made from a low conductivity metal.

MOUNTING

Heaters can be installed using brazed, crimped or welded plates.