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The Alstrom Unfired Steam Generators are designed to produce pressurized steam using boiler steam or high temperature liquid as an energy source.

Clean Steam Unfired Steam Generators utilizes feed water that is free from boiler water treatment chemicals. Typical applications: Humidification, Sterilization, Food Processing, Parts Cleaning. Usually clean steam generators are made of stainless steel pressure vessel and accessories. When city water is used for make-up, continuous blowdown is required. The Alstrom patented blowdown heat recovery system reduces consumption of the heating media.

Process Steam Unfired Steam Generators are used to protect fired steam boilers from harmful chemicals contained in the return condensate, such as in pulp and paper processing.

The Alstrom Unfired Steam Generators are available in Horizontal or Vertical configuration.