What is the function of the King valve in a refrigeration system?

The function of the King valve in a refrigeration system is to act as a liquid line stop valve at the outlet of the high pressure liquid receiver. This component is critical because it helps to control the flow of refrigerant into the system and prevents backflow from occurring, ensuring that the system operates efficiently and safely.

By strategically placing the King valve at the outlet, it allows for easy maintenance and servicing of the refrigeration system. When the King valve is closed, it isolates the liquid refrigerant in the receiver from the rest of the system, which is particularly useful during repairs or when adjustments need to be made.

In addition to its main function as a stop valve, the King valve can also facilitate the process of refrigerant charging and ensure that pressure levels remain stable, contributing to the overall efficiency and performance of the refrigeration system.