Watt-Flex Cartridge Heaters Last Longer
Cartridge heater life is directly related to its internal operating temperature.
Watt-Flex cartridge heaters run substantially cooler and have a more uniform temperature profile than conventional heaters. The result is Watt-Flex heaters that last up to 5 times longer, have less downtime and lower operating costs than conventional cartridge heaters.
Watt-Flex cartridge heaters run substantially cooler and have a more uniform temperature profile than conventional heaters. The result is Watt-Flex heaters that last up to 5 times longer, have less downtime and lower operating costs than conventional cartridge heaters.
Efficient Heat Transfer
The high purity MgO dielectric in Watt-Flex heaters is compacted to extreme density, ensuring maximum heat transfer away from the core to the heater sheath.
As the energized split-sheath expands, it creates intimate contact with the bore wall, efficiently transferring heater sheath to the host metal.
Conventional ceramic core cartridge heaters (shown below) use multiple heating cores that can independently burn out, causing a cold section on the sheath. And voids of coil at core junctions produce cold sections on the heater profile.
As the energized split-sheath expands, it creates intimate contact with the bore wall, efficiently transferring heater sheath to the host metal.
Conventional ceramic core cartridge heaters (shown below) use multiple heating cores that can independently burn out, causing a cold section on the sheath. And voids of coil at core junctions produce cold sections on the heater profile.
Unlike conventional ceramic heaters, Watt-Flex heaters use a continuous heating coil to achieve a more uniform temperature profile. With Watt-Flex heaters, there are no independent heating element sections to burn out. Watt-Flex heaters are either totally on or totally off.
What Causes Conventional Heaters to Warp and Bind?
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In conventional cylindrical heaters, temperature can vary from one side of the heater diameter to the other. These differentials are caused by heat deflection within a close fitting bore, and are the most frequent cause of heater warping and binding during removal.
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How the Watt-Flex Split-Sheath Prevents Bore Seizure
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With the Watt-Flex heaters' unique split-sheath design, each half of the heater expands and contracts independently.
When energized, the heater expands to make intimate contact with the bore wall. When de-energized the sheath contracts for ease of removal: |
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Bi-lateral expansion eliminates tight fits.
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Dalton Electric's standard warranty covers the removal of Watt-Flex Heaters from bores, provided that the bore fit is a minimum of 0.005" and there is no bore contamination to cause seizure.
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Watt-Flex Heaters: Hot Tip or Cool Tip Options
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Watt-Flex heaters use a continuous coil construction that can be designed to deliver either full or reduced power at the tip to suit your process heating application.
Conventional heater designs prohibit heated tips. |
Watt-Flex heaters, however, can be constructed for hot or cool tips by either concentrating or stretching the continuous coil inside the densely compacted MgO dielectric
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External Thermocouples: An Exclusive Watt-Flex Option
Watt-Flex split-sheath cartridge heaters can be manufactured with a groove along the exterior of the cartridge to accommodate a needle-type thermocouple for more accurate temperature sensing and control.
Measure temperature at the precise point of heat transfer.
Unlike conventional heaters with internal thermocouples that measure internal heater coil temperature, Watt-Flex external thermocouples measure more precisely at the point where heat transfers from the heater to the host metal.
Monitor temperature at any point along the heater.
Dalton Watt-Flex heaters give you the flexibility to monitor heat at any point along the heater, instead of at pre-defined fixed points with internal monitors in conventional heaters.
Replace heater or thermocouple independently.
With Watt-Flex external thermocouples, you can replace either the heater or the thermocouple independently, without having to replace an operational component as with conventional heater designs.
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