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Mineral Insulated Band Heaters

Mineral insulated band heaters are rugged and heavy duty heaters made for applications that require high temperatures (up to 1400ºF) and high watt densities (up to 100 w/in2). These heaters are ideal for increasing output especially in injection molding and to meet the heating requirements to process newly engineered high tech resins. The nickel chrome resistive material inside a mineral insulated heater is embedded in Aluminum Oxide insulating medium which provides excellent heat transfer and dielectric strength. A stainless steel outside casing gives external protection. Bucan Mineral insulated band heaters are made with various clamping mechanisms, electrical termination styles, thermocouples and can be manufactured with holes and cut-out.

Mineral Insulated Band Heaters

Typical Heating Applications:

  • Injection Molding Machines
  • Plastic Extruders
  • Blow-Molding Machines
  • Heat Treating Pipes
  • Cylinder Heating Applications

Physical and electrical ratings and limitations

Maximum temperature: 1400ºF
Max ID for one piece construction: 14"
Max ID for two piece construction: 26"
Max width: 6"
Gap: 1/4" to 3/4" depending on width
Max width for heaters less than 3": Twice the diameter
Max voltage: 480V
Max amps for leads: 10 Amps
Max amps for screw terminals (10-32 UNF): 22 Amps
Sheath Material: Stainless Steel 430

B1 Style

Post terminals (10-32 UNF) placed along the width of the heater side by side

Post terminals along the width of the heater side by side

B2 Style

Post terminals (10-32 UNF) placed Along the length of the heater side by side.

Post terminals along the length of the heater side by side

 

G-STYLE - TERMINAL BOX

Post terminals (10-32 UNF) placed inside a heavy duty stainless steel terminal box that eliminates the risk of electrical shock and shorting.

 

Post terminals (10-32 UNF) placed inside a heavy duty stainless steel terminal box

LP Style

Low profile terminal cover for stainless steel braided high temperature leads.  The orientation of the leads could be across the width or parallel to the circumferential length of the heater.

 

 

Low profile terminal cover for stainless steel braided high temperature leads

E Style

Stainless steel braided high temperature leads exiting vertically on the surface of the heater.

Stainless steel braided high temperature leads exiting vertically on the surface of the heater

H Style

A flexible steel hose protecting high temperature leads exiting vertically on the surface of the heater

A flexible steel hose protecting high temperature leads exiting vertically on the surface of the heater

K00 Style

European plug placed on a terminal box in a vertical position vertical with box

 

European plug placed on a terminal box in a vertical position vertical with box

K90 Style

European plug with a terminal box placed in a 90° position.

European plug with a terminal box placed in a 90° position

Dimensional Limitation with Different Type of Terminals

Termination Min. ID (in) Min. Width (in)
B1 2 2
B2 2 1.5
G 4 1.5
LP 1.5 1.5
E 1.5 1.5
H 2 2
K00 4 1.5
K90 4 1.5

One piece construction

To secure good clamping and efficient heat transfer, recommended width 2in -3in.

Two piece construction

To facilitate the installation on a barrel. This construction type is recommended either for heaters having internal diameters above 14in. Max ID 26in.

Hinged construction

Two piece construction heaters with a hinge on one side. The terminals of these heaters are made 90° with respect to the gap or next to the gap.

Expandable construction

Two piece construction heaters that have a common top sheet. This construction type allows the opening of the heater in order to install it on a barrel. The terminals of these heaters are made 90° with respect to the gap or next to the gap.

Holes and Cutouts

Mineral insulated heaters can incorporate holes and cut outs with certain dimensional restrictions.

Dimensional Limitations

Construction ID (in) Width (in)
Max. Min. Max. Min.
One-piece 14 1 6 1
Two-piece 26 3 6 1
Expendable 14 3 6 1.5
Hinged 26 6 6 1.5

Selection tips

The chart (seen above) is a watt-density selection guide for different heater diameters.

The following points should also be considered.

  • The watt-density for heaters wider than 2" should be reduced by 25%.
  • The watt-density for heaters that have an insulating jacket should be reduced by 30%.
  • To maintain moderate on-off cycles, it is recommended to make the wattage of an MI heater as close as possible to the application wattage.
  • Multiple narrow heaters (1.5" - 2.5") are preferable to a single wide heater.
  • Because they run at high temperatures and are exposed to severe thermal expansions, MI heaters should be retightened (after the initial tightening) when their temperature reaches 400°F. Disconnect power before tightening.
  • Holes and cutouts increase the unheated sections and complicate the internal construction of a heater. In most cases it is possible to use a wider gap instead.