Case 580SR Service Manual page 773

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SECTION 50 - CAB HEATING AND AIR CONDITIONING 13
4. When a liquid is atomized through an orifice, the
temperature of the resultant vapour will lower.
The low temperature of the atomized liquid will
then absorb heat from its surrounding. On air
conditioning systems the refrigerant is atomized
using an expansion valve.
C?
F28683