Heater Design

The design of a heater has much to do with its performance and, therefore, its life in an application. The Watt-Flex® cartridge heater does not have a ceramic core that can crack during the swaging process. Conventional heaters will keep a very tight distance between coil and sheath to affect optimum heat transfer. But this limits the insulation value.

Since Dalton Electric swages the cartridge to a much denser state, the insulation value is greater than a conventional heater, keeping the current in the coil and eliminating shorting to sheath.

	Additionally, the greater compaction allows for better heat transfer. So Dalton heaters are not affected by the greater distance between coil and sheath, since the heat moves more efficiently through the dielectric.
Watt-Flex Cartridge Heater Dielectric

And, the split sheath design will expand when energized to move heat away from the heater into the host metal through wall-to-wall contact (conduction heating optimized). Cooler running coils simply last longer and the unique design of the Watt-Flex split sheath simply contributes to longer life.