What does a filter remove at the inlet of a capillary tube?

A filter at the inlet of a capillary tube is specifically designed to remove solids. In refrigeration and air conditioning systems, it's essential to ensure that contaminants, such as dirt, debris, or any particulate matter, do not enter the capillary tube. The capillary tube operates by allowing the refrigerant to pass through it at precise flow rates, and any solids could disrupt this delicate balance, leading to blockages or inefficient operation of the system.

Removing solids helps maintain system reliability and performance, ensuring that the refrigerant can flow smoothly without unnecessary restrictions that could lead to pressure drops or uneven cooling. Although moisture and other contaminants are also important to manage in refrigeration systems, they are typically handled by different components, such as driers, rather than filters at the capillary tube inlet.