What valve connects multiple evaporators of varying temperatures to a single compressor?

The evaporator pressure regulator (EPR) is designed to control the pressure in the evaporator to allow multiple evaporators operating at different temperatures to be connected to a single compressor. This regulation is crucial for maintaining efficiency and preventing issues such as compressor floodback or excessive workload.

The EPR works by adjusting the flow of refrigerant to the evaporators based on the pressure differential. When multiple evaporators have varying temperature requirements, the EPR can modulate the refrigerant flow to ensure that each evaporator receives the appropriate amount of refrigerant based on its specific pressure and temperature needs. This not only enhances overall system performance but also prevents the compressor from trying to handle incompatible loads that could lead to operational inefficiencies or failures.

In contrast, other valve types mentioned – such as the crankcase pressure regulator, oil pressure regulator, and head pressure regulator – serve different purposes that do not involve managing multiple evaporators operating at differing conditions. Their roles are more focused on overall system pressure management or oil flow, rather than directly balancing the operational parameters of multiple evaporators.