Watt-Flex Cartridge Heaters | Dalton Electric Heating

The Revolutionary Watt-Flex® Split-Sheath Cartridge Heater

  • Maximizes Heat Transfer
  • Reduces Maintenance Costs
  • Reduces the Cost of Process Heating

Watt-Flex Cartridge Heaters run more
efficiently, use less power and last
up to 5 times longer than conventional
cartridge heaters.



A single continuous heating
coil ensures a uniform
temperature profile.

No sections to burn out as
in conventional cartridge heaters.

Split-sheath expands to maximize heat transfer and
contracts when cold for easy removal from bore.

Ideal for use in oversized
. 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.

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Resistencias de Cartucho Watt-Flex®

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

Dalton Electric's 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. Dalton has developed highly-specialized manufacturing techniques to 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.

To find out how Dalton Watt-Flex heaters can reduce your your process heating costs, call us today at (978) 356-9844.

Or, click here to request or download Watt-Flex Cartridge Heater product literature.

Bore Seizure

Uneven Heat

Cost of Heating