Cartridge-type heaters
Siekerkotte heating cartridges are fabricated in five designs:
- Compressed cartridge heaters
- High density cartridge heaters with/without thermocouple
- Foundry cartridge heaters
- Helical coil cartidge heaters
- Square pipe cartidge heaters
The choice of the right cartridge heater is determined by the surface load at shell, the tool temperature and different conditions of application.
The following drawings show the two types of cartrige heaters:

- Siekerkotte cartridge heaters (compressed)

- Siekerkotte high density cartridge heaters