The static setting of a thermostatic expansion valve is rated in:

The static setting of a thermostatic expansion valve (TXV) is indeed rated in terms of the degree of superheat. This measurement refers to the amount of heat added to the refrigerant after it has evaporated and is in its gaseous state. The purpose of the TXV is to regulate the flow of refrigerant into the evaporator, ensuring that the system maintains efficiency and performance.

By setting the expansion valve to a specific degree of superheat, technicians can ensure that the refrigerant vapor entering the compressor is at a temperature high enough to prevent liquid refrigerant from entering and potentially damaging the compressor. This setting is crucial for the proper functioning of the refrigeration system, as it ensures that the refrigerant has fully evaporated before being compressed again.

Understanding the degree of superheat helps technicians optimize the performance and reliability of refrigeration systems, making this measurement a key aspect of evaluating and maintaining the functionality of a TXV.