Tempco Custom Heater Manufacturing

Duraband (Micaband) heater Specifications and Tolerances

Performance Ratings

Maximum Temperature: Standard Sheath: 900°F (482°C)

Nominal Watt Density: 20-45 W/in2 (3-7 W/cm2 )

Maximum Watt Density: Dependent on heater size and operating temperature.

Electrical Ratings

Maximum Voltage: 480VAC

Dual Voltage or 3-Phase: Available depending on heater design

Maximum Amperage:

  • Lead Wire Termination: 10A
  • Screw Terminations:
  • 8-32UNF—20A
  • 10-32UNF—25A

Resistance Tolerance: +10%, –5%

Wattage Tolerance: +5%, –10%

Caution: Exposed electrical wiring on band heater installations is a violation of Electrical Safety Codes including O.S.H.A.

 

Physical Size Construction Limitations

Minimum Width: 3/4" (19.1 mm)

Width Tolerance: ±1/16" (1.59 mm)

Minimum Inside Diameter: 7/8" (22.1 mm)

Nominal Gap: 3/8" (9.5 mm)—If a larger gap is required for probes or thermocouples, specify when ordering.

Built-In Brackets

Heater Width Number of Brackets
1-1/2" to 3" (38-76 mm) 1
3-1/8" to 5" (79-127 mm) 2
5-1/8" to 6-7/8" (130-145 mm) 3
7" to 10" (178-254 mm) 4
10-1/8" to 15" (257-381 mm) 5

Minimum ID and Width for Construction/Clamping Styles

  Min. ID Min. Width
Style in mm in mm
NB 2 50.8 1/1/04 31.8
NS 3 76.2 1/1/04 31.8
NE 2/1/02 63.5 1/1/04 31.8
SB 8-Jul 22.1 4-Mar 19.1
SS 2 50.8 4-Mar 19.1
SE 2/1/02 63.5 1/1/04 31.8
FB 1 25.4 4-Mar 19.1
FS 2 50.8 4-Mar 19.1
FE 2/1/02 63.5 1/1/04 31.8
SL 4 101.6 1/1/04 31.8
NSL 4 101.6 1/1/04 31.8
NEL 4 101.6 1/1/04 31.8
LT 7 177.8 1/1/02 38.1
LS 7 177.8 1/1/02 38.1
LE 7 177.8 1/1/02 38.1
TWL 1 25.4 1 25.4
RNB 5/1/02 134.7 1 25.4
RNS 10 254 1 25.4

 

Note: Refer to individual descriptions for further information. Actual heater minimums will be a combination of termination and construction/strap styles.

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