What is a "King Valve" in refrigeration systems?

The term "King Valve" refers specifically to the liquid line stop valve located at the outlet of the high-pressure receiver (HPR) in refrigeration systems. This valve plays a critical role in controlling the flow of refrigerant from the receiver to the rest of the refrigeration system. By allowing or restricting the flow, the King Valve helps maintain proper pressure and refrigerant levels within the system, making it essential for efficient operation and performance.

In refrigeration systems, managing the flow of refrigerant is crucial for maintaining system balance and ensuring that all components function correctly. The King Valve allows technicians to isolate the refrigeration system safely for maintenance or repair without losing refrigerant. This is particularly important when dealing with the high pressures associated with refrigerant systems.

The other options describe different components or functions within a refrigeration system, but they do not accurately define what a King Valve is or its specific role. Understanding the unique functions of each component helps clarify why the King Valve is integral to the operation and management of refrigeration systems.