Mineral Insulated Cable Heaters

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Mineral insulated cable heaters (MI cable heaters) are sheathed, MgO insulated heater cables with excellent dielectric strength and insulation resistance properties. They can be formed to a wide variety of shapes and sizes. They can deliver high temperatures to areas where standard heaters are impractical due to size or space restrictions. MI cable heaters can be formed to cover cylindrical parts that require uniform or distributed wattage heat patterns. Special cold section lengths can also be designed into this heater as dictated by application requirements. Custom-formed mineral insulated cable heaters are transitioned with a moisture-resistant adapter to flexible lead wire. The flexible lead wire can have additional protective jackets such as stainless-steel braid or armor cable for abrasion protection.

Cable Heater Design Features

High temperature capacity to 1500°F
Diameters from 0.04” to 0.25” to suit individual applications
Capable of 240V or higher in specific applications
Factory pre-formed or field formed with proper tooling
Fittings, flanges, vacuum fittings, and other mounting methods available
Manufactured with high alloy sheath materials to mitigate corrosion
Wattage and voltage customized to application
Elements can be formed to specification or formed on location
Optional internal thermocouple can be located at various points for precise temperature control
Sealed lead wire transition eliminates contamination
Sheath materials available in 304 stainless steel, 316 stainless steel, Inconel® 600, or custom material available upon request

Immersion Cable Heaters

Durex can modify any cable heater with special sheath materials, seals and protective connection housings for immersion heating in a gas or liquid environment. Flange, threaded fittings and other mounting styles, are also available.

Teflon® Sheathed Cable Heaters

When the temperature, moisture-resistance or chemical exposure factors require, Durex cable heaters can be supplied with Teflon® end seals on the heater sheath, Teflon® coating on the entire sheath and/or Teflon® insulated lead wires. Durex produces these cable heaters for such demanding yet varied environments as semiconductor and food processing applications, among many others.

Considerations When Selecting a Mineral Insulated Cable Heater

When choosing your next MI cable heater, factors to consider include:
Voltage and wattage rating
Installation and mounting requirements (brackets, fittings, etc.)
Temperature control
Electrical termination type required
Forming requirements
Operating temperature of the equipment
Watt density must be validated to ensure a long operating life

Start Designing Your Custom MI Cable Heater Today

Durex Industries has the experience and quality control you can trust for your next mineral insulated cable heater. Whether it is for an MI cable heater that can adjust to cryo-temps or a heater that adjusts to low or high-power densities, we have the expertise and knowledge you are looking for. Our capabilities also include custom design-build-to-suit to ensure success in every application.

Mineral Insulated Cable Heaters Specs & Options

Performance Ratings

Watt density: 150 watts per square inch of sheath surface area maximum with ideal application, consult factory
Maximum temperature: 1500°F (815°C)

Dimensional Ratings

Heater cable diameters: 0.040", 0.062" 0.093", 0.125", 0.132", 0.150", 0.170", 0.188", 0.200", 0.250", Consult the factory for additional sizes
Cable diameter tolerance: 0.005
Heater length tolerance: 0 to 6" ( 1/8"), 6" to 18" ( 1/4"), 18" to 24" ( 3/8"), 24" to 120" ( 3/4"), 120" to 300" ( 1")

Electrical Ratings

Resistance tolerance: 10%
Standard voltage: 120 or 240 volts, for higher or lower voltages, contact Durex Industries
Thermocouples: ANSI Type J or K

Heater Transition and Termination

Transition (potting) adapters:
0.25" to 0.38" diameter (see standard specifications chart)
Transition temperature ratings: The standard transition is rated to 482°F (250°C). An optional high-temperature transition is rated to 842°F (450°C). Standard heater lead wire insulation is TGGT (Teflon®, double fiberglass, Teflon® impregnation) rated to 482°F (250°C)
Thermocouple: Standard leads use a fiberglass insulation rated to 900°F (482°C) Teflon® insulation is available upon request
Optional lead protection: Fiberglass sleeving, stainless steel overbraid, or stainless steel armor cable available

Standard Specifications

Sheath Cross Section	Maximum Voltage	Adapter		Minimum Bend Radius
		Diameter	Length
0.062 Dia.	120	0.25	1.16	0.18
0.093 Dia.	120	0.28	0.88	0.28
0.125 Dia.	240	0.28	0.88	0.38
0.080 x 0.140	240	0.28	0.88	0.38
0.100 x 0.120	240	0.28	0.88	0.38
0.150 Dia.	240	0.28	0.88	0.45
0.105 x 0.150	240	0.28	0.88	0.45
0.130 x 0.130	240	0.28	0.88	0.45
0.188 Dia.	240	0.38	1.20	0.56
0.200 Dia.	240	0.38	1.20	0.60
0.250 Dia.	240	0.38	1.20	0.75

Radius may be reduced to two times the sheath diameter under ideal conditions. Consult Durex Industries. Resistance / Wattage Tolerance 10%

Mineral Insulated Cable Heaters Applications

Heat Trace / Freeze Protection
Semiconductor Manufacturing
Plastic Molding Hot Runners Systems
Air or Liquid Immersion
Cutting and Sealing Bars
Tube and Pipe Heating
Large Surface Areas
Vacuum Chambers

Mineral Insulated Cable Heaters Literature Downloads

Coil and Cable Heaters 4-29-19 - 422KB