Which component is critical for protecting a refrigeration system from moisture contamination?

The filter drier is crucial for protecting a refrigeration system from moisture contamination because it serves as a key component in removing moisture and contaminants from the refrigerant before it circulates through the system. Moisture can lead to corrosion, freezing, and poor refrigeration performance, so the filter drier absorbs moisture and traps particles, ensuring that the refrigerant remains clean and dry.

In a refrigeration system, the filter drier typically contains a desiccant that actively absorbs moisture and a filter that captures debris. By preventing moisture from entering the system, the filter drier helps maintain the integrity of components like the compressor and the expansion valve, which could be adversely affected by contaminants. This protective role is essential in extending the lifespan and efficiency of the refrigeration system.

Other components in the system, such as the compressor, expansion valve, or receiver, play important roles in the refrigeration cycle but do not specifically focus on moisture removal.