What valve is used to connect multiple evaporators of different temperatures to a single compressor?

The evaporator pressure regulator (EPR) is designed to control the refrigerant pressure within the evaporator section of a refrigeration system. By doing so, it ensures that multiple evaporators operating at different temperature levels can effectively share a single compressor.

In practice, each evaporator may have specific cooling requirements based on the products being stored or the processes occurring within them. The EPR maintains appropriate pressure and flow of refrigerant to each evaporator based on its load, allowing them to operate efficiently and maintain the desired temperatures. This regulation prevents one evaporator from affecting the operation of another and facilitates the overall balance of the refrigeration system.

In contrast, the other types of regulators serve different purposes. The crankcase pressure regulator (CPR) is primarily used to protect the compressor by maintaining a certain pressure in the crankcase, while an oil pressure regulator manages the lubrication system for the compressor. The head pressure regulator is focused on maintaining system pressure on the high side to ensure correct operation of the compressor during varying ambient conditions or loads. Each of these plays a crucial role, but none are specifically designed for managing the operation of multiple evaporators with differing temperature needs as the EPR is.