Operating principle

The combustion air is introduced into the VAP boiler through a preheater which recovers the residual heat. It is then injected into the burner. The flame and the hot gases heat a monotubular coil of varying diameter via three gas passes. Feed water is pumped through the coil, which, once heated, is transformed gradually into steam. A separator ensures the dryness of steam if required by the process is always sent to the point of use.

Because of the innovative design, the rise to working pressure can take place in 3 minutes starting from a cold boiler in stand-by. This characteristic as well as the low volume of water reduces the thermal losses and therefore helps to keep the operating costs low.

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