Ceramic Band Heaters

 

Typical applications are plastic molding, extrusion and molding presses. Ceramic band heaters are also used for pipe heating, heat treating and autoclaves or any application where there is a need to apply heat to a cylindrical surface.

Design Features

  • Energy efficient, less power consumption
  • High sheath temperature capability up to 1600°F
  • Thermally insulated
  • Uniform temperature
  • Flexible, easy to install and remove
Ceramic Fiber Insulation: The standard insulation is 1/4″ thick to improve energy conservation 25% and more over non-insulated bands. 1/2″ thick insulation optional. In the Maxi-Miser design, an additional 1/2″ non-compressed layer of insulation is contained in a separate, flexible chamber for even greater energy savings.
band heaters
Maxi-Miser Insulation Chamber
Serrated Sheath: Sheath material is resistant to heat and corrosion. Unique Serrations maximize flexibility, increase surface contact and provide easy opening and installation of the heater, eliminating the necessity of two piece band heaters up to 18″ in diameter.

Simplified Installation, Additional Energy Conservation: Ceramic Band Heaters can be manufactured in widths much greater than what is practical in Mica Band Heaters, eliminating heat losses between gaps in narrow band heaters and simplifying installation.

flex4a1_A

Style I

Post Terminals

flex4a2_B

Style F

Leads in armor cable exit through outside surface

flex4a1_B

Style I w/ T-Box

Post Terminals in terminal box

flex4a2_A

Style B

Fiberglass Leads exit through outside surface


  • Thickness w/ 1/4″ Insulation: 5/8″
  • Thickness w/ 1/2″ Insulation: 3/4″
  • Thickness of Maxi-Miser: 1″

Ceramic heaters can be manufactured in flat design for use as a strip heater, radiant heater or without shroud for use as a furnace element.


Ceramic Band Heaters with Blower

A perforated rather than insulated shroud with a cowl, plenum and blower is designed for use on plastic extrusion equipment where some processes generate excessive heat from pressure. When a predetermined temperature is exceeded, the blower will engage, cooling the process. Consult Ogden with application requirements.
Mighty Miser Ceramic Band Heater
Specifications:
Resistance Tolerance: + 10%, – 5%
Wattage Tolerance: + 5%, – 10%
Cold Resistance: 12% lower than hot resistance
Maximum Volts: 600
Maximum Amperage: 25
Maximum Watt Density: Varies depending upon application considerations
Minimum Width: 1″
Minimum Width on Maxi-Miser: 3″
Width Tolerance: 1/8″
Minimum I.D.: 2″
Minimum I.D.: Double Insulated: 4″; Maxi-Insulated 6″
Maximum I.D.: 18″ full band; 36″ half band
Maximum Width: 3 – 4 x I.D. depending upon type and size
Standard Width Increments: 1/2″
Standard Gap when Tightened: 1/2″ depending upon I.D.
Thickness w/1/4″ Insulation: 5/8″
Thickness w/1/2″ Insulation: 3/4″
Thickness of Maxi-Miser: 1″
Ceramic heaters can be manufactured in flat design for use as a strip heater, radiant heater or without shroud for use as a furnace element.
Maintenance and Trouble Shooting for Prolonged Heater Life:
1. Regulate Voltage. A 10% variation in voltage results in a 20% variation in power.
2. The cylinder must be clean and smooth for efficient heat transfer.
3. When attaching the lead wires to the terminals, excessive turning pressure can cause breakage of the terminal resistance wire.
4. A 1/2″ gap should be maintained at the opening when operating. Retightening is not normally required, however, if the operating temperature is changed, the flange bolt should be checked.
5. Oil, plastic, dirt, etc., should not be allowed to accumulate on the heaters.
6. Select a heater to match the diameter of the cylinder.
7. Match the heaters as closely as possible to the actual load requirement.

Mounting Configurations

 

Fig. E:Standard Mounting method on all configurations

Fig. R: Quick Release Clamp Assembly with 1/4 – 20 screw

Additional Variations

  • Dual Voltage
  • 3 phase
  • Ground lead or terminal
  • Stainless Steel shroud
  • Partial coverage
  • Oversize gap
  • Boxes fitted with cable or braid
  • Perforated shroud without insulation

Spring Loaded Screw with Fig. E Mounting Flange.

Fig. N: Quick Release Barrel Nut Assembly with 1/4 – 20 bolt

Heat Losses of Band Heaters