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Mica Band and Nozzle Heaters

Mica band heaters are utilized in applications across various industries, and extensively in the plastics industry. Mica band heaters are capable of sheath temperatures up to 1200°F (650°C) with stainless steel sheath, or 900°F (480°C) with aluminized steel sheath. A variety of heater constructions are available, with many termination and clamping options.

Performance Capabilities

  • Aluminized steel sheath temperatures to 900°F (480°C)
  • Stainless steel sheath temperatures to 1200°F (650°C)
  • Watt densities to 55 W/in² (8.5 W/cm²)

Features and Benefits

  • Economic and rugged design.
  • Expert engineered for optimal heater performance and longevity
  • Available in 2-pc or expandable construction for convenient installation and removal from barrel.
  • A variety of termination options to fit application needs.

Applications

  • Extruders
  • Blown film dies
  • Injection molding machines
  • Other cylinder heating applications

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1-Piece Construction
Common mica band heater construction.

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2-Piece Construction
Allows easy installation and removal. Available on heaters 3” diameter or greater. Specify total wattage when ordering.

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Expandable Construction
An expansion seam allows heater to be opened to the full diameter of the barrel.  Heaters should not be expanded more than twice.

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Flex-band Construction
Flexible 1-piece construction allows heater to be opened up to the full diameter of the barrel.

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Hinged Construction
Can be opened and closed as often as necessary. Allows easy installation and removal.

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Partial Coverage
Used when an obstruction would prevent a standard full circumferential heater from fitting completely around a machine barrel.

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Inside-out Band Construction
Designed to heat the inside diameter of cylinders. Termination and mounting hardware are located on the I.D. of the heater.

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Rectangular Construction
Made to exact customer specifications. Dimensional drawing is required.

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Holes & Notches
Provides access for instrumentation.
Standard hole sizes up to 2” diameter.

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Bayonet Adaptor
Mounting hardware for bayonet style thermocouples.

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Type A
Stainless steel braided leads, axial exit from both sides of gap. Braided leads offer flexibility and abrasion protection. Typical lead exit for nozzle heaters.

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Type L
Fiberglass leads, axial exit from both sides of gap. Typical lead exit for nozzle heaters.

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Type B
Fiberglass leads with tight stainless steel overbraid, axial exit 180° from gap. Braided leads offer flexibility and abrasion protection.

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Type C
Leads with tight stainless steel overbraid, radial exit. Braided leads offer flexibility and abrasion protection.

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Type E
Leads with loose stainless steel overbraid, radial exit. Braided leads offer flexibility and abrasion protection.

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Type H
Leads with stainless steel flexible hose protection, radial exit. Hose provides superior abrasion protection.

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Type F
Leads with fiberglass sleeving, radial exit. Provides additional temperature protection.

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Type K
Leads with no additional protection, radial exit.

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Parallel
Standard orientation for heaters 1.5” wide or greater. #10-32 threaded screw terminals.

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Tandem
#10-32 threaded screw terminals.

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Opposite
Terminals on each side of gap. Standard for nozzle heaters and band heaters less than 1.5” wide. #10-32 threaded screw terminal.

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Three Terminal Construction:

Ground Terminal
Can be connected to the sheath for easy grounding.

3-phase or Dual Voltage
A third terminal can be added to provide dual voltage or three-heat operation.

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Ceramic Terminal Covers
A cost effective way to insulate post terminals. Sized for standard length posts.  #10-32 screw thread size.

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Terminal Box
Covers terminals for added safety. Conduit may be attached to the box through 7/8” dia. holes in the ends of the box.

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European Plug (DIN)
“ERGE” European style plugs provides a safe and simple way to apply power to band heaters. Maximum of 15A at 240V.

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European Plug (IEC) Vertical
Maximum of 15A at 240V.

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European Plug (IEC) Horizontal
Maximum of 15A at 240V.

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European Style Female Adaptors
For use with “ERGE” high temperature European style plugs.

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Stainless Steel Strap
Provides superior clamping and heat transfer.

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Integrated Barrel Nuts
Barrel nuts are welded directly to the sheath of the heater. No strap to loosen or adjust. 5/8” clearance required.

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Spring Loaded Barrel Nuts
Maintains a tight heater fit during start-up.

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Flange Lock Up
This option is available, however the stainless steel strap design is superior, and should be used whenever possible. ½”clearance required.

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Wedge Lock
Provides clamping where mounting space is limited. Available with Type A and L leads only. Clearance from I.D. of the heater to the outside edge of the Wedge-Lok is 5⁄16 inch (8 mm) nominal.

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Clamping Pads
Used when an obstruction hinders a standard clamping strap from fitting completely around the machine barrel. Clamping pads have a hole to allow easy fastening to machine barrel.

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Quick Latch
Allows easy and fast  installation and removal without tools.