Cold Gas Systems

KALTGAS is a temperature control system that relies on the low temperature of liquid nitrogen as a refrigerant. The liquid nitrogen is evaporated in a cryogenic vessel using a heater (jet). This creates a constant, cryogenic gas stream. By varying the heater (jet), both the cooling capacity and the gas flow volume can be modified, and by varying the jet power, the liquid nitrogen consumption can be reduced to the necessary minimum. The cryogenic gas stream is then piped to the object to be cooled through a vacuum-insulated, flexible metal line. A KALTGAS system can generate a gas stream as cold as -180°C within just a few minutes.

In most cases, this cold gas system is used only to generate the cold gas flow. This gas flow can be controlled volume-wise via a regulator. Since such a control system operates without counterheating, temperature stabilization is virtually impossible.

To achieve good temperature and control stability, a post-heating module (heat exchanger) must be used. This can be connected directly to the hose or installed in a chamber in the immediate vicinity of the cold gas flow.