Finned Tubular Heaters
In applications where tubular heaters are exposed to forced convection, placing fins around tubular heaters increases their surface area and thus improves their heat-transferring capacity. Compared to regular tubular heaters, a fined tubular heater runs at lower surface temperatures for the same watt densities when placed in identical air streams. Graph 1 (see Selection tab) compares watt density, outlet air temperature, and the speed of air flow for regular and finned tubular heater respectively. Despite their advantages, finned tubular heater are not recommended for applications where outlet air temperatures exceed 600°F.
Material and watt densities of Finned Tubular Heater
The sheath material of a finner tubular heater and its watt density are two critical factors that affect its durability. The standard finned tubular heater are made of steel sheath and steel fins (750°F max. surface temperature) since steel is very efficient in heat transfer. These Bucan heaters have a plain surface finish. For corrosive environments or high-temperature applications (above 750°F), finned tubular heater could be made with stainless steel sheath and stainless steel fins.
Safe watt densities that keep surface temperatures below allowable limits depend on the speed of the incoming air and its outlet temperature. Graph 2 (see Selection tab) shows maximum watt densities recommended for a specific sheath temperature and air velocity. Bucan is one of the most trusted Tubular heater manufacturers in Canada contact us today to know more about Finned Tubular Heater.
Typical Heating Applications
- DRYERS
- RECIRCULATION OVENS
- FAN-FORCED HEATERS
- HEAT TREATING
- ANNEALING
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Physical Characteristics
The outside diameter of fins, their thickness, the spacing between consecutive fins, as well as the element sheath and fin material, play a major role in the effectiveness of heat transfer.
| TUBE DIAMETER | FIN THICKNESS | FINS PER INCH | FIN WIDTH | *TOTAL SQ.INCH PER LINEAR INCH | *MAX SHEATH LENGTH | *OUTSIDE DIAMETER OF FINS |
| 0.260" | 0.020" | 5 | 0.375" | 8.30" | 240" | 1.01" |
| 0.315" | 5 | 9.20" | 1.07" | |||
| 0.375" | 5 | 10.10" | 1.13" | |||
| 0.430" | 5 | 10.83" | 1.18" | |||
| 0.475" | 5 | 11.60" | 1.23" | |||
| *Dimensions are subject to change | ||||||
To Heat Air
Optional Features of Finned Tubular Heater
- RUSTPROOF COATING
- STAINLESS STEEL FINS AND TUBULAR SHEATH MATERIAL
- NICKEL PLATING
- SPECIAL MOUNTING ACCESSORIES
- VARIOUS SHAPES
Mounting Attachments
Threaded fittings, if required, are the standard mounting attachments supplied with a finned tubular heater. These fittings are brazed or crimped onto the heaters. For special applications, the finned tubular heater can be made with mounting brackets that have special designs.
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Straight Finned Tubular Element
U-Shaped Finned Tubular Element
W-Shaped Finned Tubular Element
U-Shaped Finned Tubular Element with Threaded Fittings
W-Shaped Finned Tubular Element with Threaded Fittings
For specifications, please check product catalogue
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