Finned tubular heater
Finned tubular heater
A series of finned aluminum casting could be attached to the sheath of the tubular heaters, the effective heat radiating surface is increased several hundred times then, and the possiblity of accidental burns is reduced.
- Finned tubular heater is commonly used in process gas and air applications, it allows increased watt density and lower operation temperatures than non-finned tubular heaters. The temperature range is up to 649℃(1200℉,watt density range is up to 12.4W/ c㎡（80W/in^2)
- Fin Materials and Attachment Method:Steel & 304 SS, Steel wound with copper wire between fins for oven brazing to Stainless steel is mechanically wound but can be oven brazed as an option if a bright annealing atmosphere is used.
Sheath Material: Steel, 304L SS, 316L SS, Incoloy 840 and Incoloy 800
Sheath Lengths: 300mm to 2000mm depending on sheath diameter
Fins:
Sheath Material | Fin Materials | Sheath Diameter D（mm） | Fin height H(mm) | Fin thickness （mm） | Fin interval I(mm) |
Steel, 304L SS, 316L SS, Incoloy 840 and Incoloy 800 | Steel & 304 SS | Φ6.7 | 3-5 | 0.3-04 | 3-5 |
|
| Φ8 | 3-5 | 0.3-04 | 3-5 |
|
| Φ9 | 3-5 | 0.3-04 | 3-5 |
|
| Φ10 | 5-7 | 0.3-04 | 3-7 |
|
| Φ12 | 5-7 | 0.3-04 | 3-7 |
|
| Φ14 | 5-10 | 0.3-04 | 3-7 |
7 |
| Φ16 | 5-10 | 0.3-04 | 5-10 |
8 |
| Φ20 | 5-10 | 0.3-04 | 7-10 |
Maximum Voltage: Up to 600VAC (480V for UL)
Resistance Tolerance: +10%, –5%
Wattage Tolerance: +5%, –10%
Sheath watt density range: 2-13 w/cm2
Maximum Temperature:
- Steel fins on steel sheath—750°F (400°C)
- Steel fins on Incoloy or SS sheath—750°F (400°C)
- Stainless Steel fins on stainless, Incoloy 840 or Incoloy 800 sheath—1200°F (650°C)
A: Diameter of tube
B: Diameter of fin
C: Block to tail distance
D: Heated length
E: Distance between terminal
