Cartridge heaters are heating elements used in many different applications to achieve high temperatures in a short amount of time. They are rod-shaped process heaters which are mainly installed in cavities in order to heat solid blocks of material to higher temperatures than offered by alternative heating methods. In order to achieve these high temperatures, a resistance wire heating element is wound around a magnesium oxide (MgO) core which is contained in a stainless steel or Incoloy sheath.
These heaters offer much higher watt densities when compared to other types of heaters. Surface temperatures of a cartridge heater can reach 1400°F (760°C) without degradation of the heating element.
There are many different configuration options available for cartridge heaters including various diameters, lengths, voltages, wattages, and attachment methods. Different lead wire types including PTFE and fiberglass can be used as well as different strain relief methods to help prevent damage from mechanical stresses. Additionally, integrated thermocouple temperature sensors are able to be built in to provide accurate temperature feedback for your process controller.
Common Applications
Cartridge heaters are used in various applications including:
- Process heating
- Water heating
- Platen press heating
- Laboratory process heating
- Mold, die, hot plate heating
- Sealing applications