What is the primary purpose of a filter drier in a refrigeration system?

The primary purpose of a filter drier in a refrigeration system is to remove moisture and contaminants from the refrigerant. Moisture and impurities can cause significant damage to the system by leading to issues such as corrosion, acid formation, and ice or sludge formation within the refrigerant lines. The filter drier serves as a crucial component that not only filters out these contaminants but also absorbs moisture, protecting the compressor and other essential elements of the refrigeration system. This maintenance of cleanliness and dryness is vital for efficient operation and longevity of the entire system.