Heating system. Unibell J belling machines use ovens with shortwave infrared rays (IR-SW ovens), which are particularly effective in heating pipes with mid to high wall-thickness. IR-SW ovens regulate emission of the heating power with directly control of the temperature that is constantly measured on the surface of the pipe. The ovens have separate heating areas activated differently depending on the dimensions of the pipe section to be heated.Cooling system. Unibell J belling machines use a Sica patented socket cooling system with compressed air cooling fluid, treated with a special internal refrigeration cycle. This system is integrated with an additional process that recovers the refrigeration capacity of the fluid, which is also patented by Sica. After cooling the socket wall, the fluid is recovered and used to cool the forming mandrel, optimizing energy efficiency throughout the socket forming phase.
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