MEGAWAT
High density cartridge heaters

Optional features

Built-in thermocouples: One optional feature on MEGAWAT cartridge heaters is built-in thermocouples. These could be type “J” or “K”, grounded or ungrounded, and attached either at the disc end or middle of the cartridge heater.

Graphite coating: To facilitate their installation and removal, cartridge heaters could be coated with a graphite-like substance. This solid lubricant doesn’t increase the outside diameter, and is suitable for temperatures up to 750°F.

Moisture and contamination proofing: To protect cartridge heaters against moisture and contamination, Teflon lead wires are used and the lead end is sealed using Epoxy, RTV silicone or Teflon. The temperature limitation is 480°F.

Distributed wattage: In applications such as sealing bars or rubber molds, the two ends of a cartridge heater are usually colder than the middle. To overcome this inconsistency and have a uniformly distributed heat source, cartridge heaters could be made to have higher wattages at the ends. 35/30/35 is a common wattage distribution.

Center-less grinding: In applications where superior heat transfer is required, the tolerance on the outside diameter could be improved to +/- 0.001” by center-less grinding.

Zones and cold sections: We can also manufacture cartridge heaters with cold sections and separate zones that can be controlled independently.