What does a low side float prevent in a refrigeration system?

A low side float in a refrigeration system is designed to maintain the correct level of refrigerant in the evaporator, which is crucial for efficient operation. By controlling the flow of refrigerant, the float prevents the evaporator from becoming overfilled or flooded. When the evaporator is flooded, not only does it reduce the efficiency of the heat exchange process, but it can also lead to potential damage to the compressor as liquid refrigerant is not meant to enter the compressor.

Keeping the correct refrigerant level ensures that the evaporator can adequately absorb heat without being overwhelmed. This is why the prevention of overfilling is the primary function of a low side float in a refrigeration system.