which coolant type and method ??!

[Rahju]

Hi All,

for a hot sweets cooling line with the following conditions which coolant types and methods
are recommended!

Sensitive against moisture.
rail Length about 1.5 meter.
The temperature at the moment of arrival: 180 c.
The temperature at the moment of departure: 30 c.
Process time about 15 seconds.

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Thanks to all for reading this.