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Engineering Insights

By Ian Renwick | May 08, 2024

The Use And Proper Mounting Of Strip Heaters

Ask Ian imageTUTCO offers four different types of strip heaters suitable for  various applications.

Ultima Strip Heaters utilize a reliable tubular heating element encased in a stainless-steel sheath. Withstanding corrosive and high-temperature environments (up to 1200 °F / 648 °C), they are suitable for demanding applications. Offering higher watt densities, faster heat-up times, and longer service life than conventional strip heaters, they are customizable with various mounting options, terminations, and lengths. They can also be finned for air heating applications if required.

HT Mica Strip Heaters are cost-effective and reliable in providing uniform heat over flat surfaces. With a maximum operating temperature of 900 °F / 482 °C, they are best suited for low to moderate temperatures. Available in various shapes, sizes, and termination styles, they are versatile for different applications, including food warming, heating enclosures, and packaging machinery.

Permaheat Strip Heaters are TUTCO’s most rugged strip heater. Designed for heavy-duty applications, they use a tubular heating element for excellent heat transfer and resistance to contamination. Featuring an aluminum body, they conform better to slightly irregular surfaces due to high thermal conductivity and low thermal expansion coefficient. Customizable with various mounting options, terminations, shapes, and sizes, they have a maximum temperature of 600 °F / 315°C, and are suitable for medium to low-temperature applications.

Ceramic Strip Heaters can withstand higher temperatures than the others and are limited to 40 to 45 watts per square inch, depending on the application. Consisting of a stainless-steel sheath containing a high-temperature ceramic insulating nichrome wire coil, they utilize Magnesium oxide (MgO) to fill any air pockets, ensuring optimal heat transfer. With a maximum operating temperature of 1000 °F / 538°C, they are suitable for medium-temperature applications and can be customized with fins, mounting options and various terminations. Available in lengths from 6” to 160” and always 1 1/2” wide, with a thickness of 5/16” or 3/8”.

For proper mounting, follow these steps:

  • Choose a suitable location with adequate clearance, ventilation (if required), and ensure safe installation.
  • Clean and prepare the mounting surface, ensuring it is flat and smooth.
  • Apply a thin layer of thermal transfer compound to the back of the heater to improve heat transfer and fill any small air gaps, using non-metallic based thermal paste like milk of magnesia or boron nitride spray.
  • Secure the heater to the surface using clamps, bolts, screws, or rivets, avoiding overtightening or deforming the heater.
  • Connect the electrical wiring according to specifications and codes, using appropriately sized wire, terminals, connectors, and insulation.
  • While not mandatory, it’s recommended to have someone check the set up and electrical wiring for safety before applying power, prioritizing safety at all times. Double-checking the installation can prevent any potential hazards and ensure the strip heater operates efficiently and reliably.