What is the purpose of installing a filter strainer at the inlet of a capillary tube?

The installation of a filter strainer at the inlet of a capillary tube serves the crucial purpose of preventing dirt and foreign matter from clogging the tube. In HVAC systems, the capillary tube is a type of expansion device that plays a key role in the refrigerant flow and system efficiency. A blockage caused by debris can lead to restricted refrigerant flow, which in turn can cause inefficiencies in the system, potential damage, or even system failure.

By having a filter strainer in place, any particulate matter in the refrigerant is captured before it can enter the capillary tube, ensuring that the refrigerant can flow freely and efficiently. This not only helps maintain the proper functioning of the HVAC system but also extends the longevity of the components involved. The effectiveness of the filter strainer directly impacts the overall reliability and performance of the refrigeration cycle.