Watt-Flex Cartridge Heaters

The Revolutionary Watt-Flex® Split-Sheath Cartridge Heater

Watt-Flex Split Sheath Cartridge Heater
  • Maximizes Heat Transfer
  • Reduces Maintenance Costs
  • Reduces the Cost of Process Heating

The split-sheath design and highly specialized manufacturing techniques of the Watt-Flex cartridge heater reduce your total cost of process heating by an average of 40% over other heaters.

Watt-Flex Cartridge Heaters use a unique, patented split-sheath design that allow the heater to expand when energized to maximize heat transfer through greater contact with the wall of the bore. Better heat transfer means less power is consumed to maintain the set point temperature, reducing operating costs.

The Watt-Flex heater construction eliminates ceramic cores typically found in conventional cartridge heaters. Highly-specialized manufacturing techniques compact high-grade MgO dielectric to near its maximum density around the heater coil, which increases dielectric strength and heat transfer away from the coil, resulting in significantly longer heater life.

Watt-Flex cartridge heaters last up to 5 times longer than conventional heaters with less downtime for heater replacements and lower maintenance costs. Watt-Flex heaters contract when de-energized, eliminating bore seizure and the need for expensive drill-outs.

Features and Benefits

  • A single continuous heating coil ensures a uniform temperature profile. No sections to burn out as in conventional cartridge heaters.
  • Watt-Flex Cartridge Heaters run more efficiently, use less power and last up to 5 times longer than conventional cartridge heaters.
  • Split-sheath expands to maximize heat transfer and contracts when cold for easy removal from bore. Ideal for use in oversized bores. Eliminates need for tight fits, tight tolerance bores.
  • Watt-Flex's tightly compacted MgO dielectric accommodates higher watt densities - up to 50% higher warrantable watt densities than conventional heaters.
  • External Thermocouple Option- a Watt-Flex exclusive-provides more accurate temperature at the point of heat transfer to host metal.


Hands-On Assistance from Technical Specialists


Need help?

Fill out our cartridge heating application form and we will have one of our process heating experts contact you, or call
(855) 737-4718 to speak to one of our experts immediately.
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