Which component is listed as the first element in the liquid line sequence from condenser to TEV?

• A. King valve
• B. Filter dryer
• C. Solenoid valve
• D. Sight glass

Answer: (A)

The first component in the liquid line from condenser to TEV is the valve that isolates the high‑pressure liquid coming off the condenser. This king valve serves as a service shutoff, allowing you to isolate and safely purge or charge the system and perform maintenance without depressurizing or draining the entire circuit. Once the valve is closed or opened as needed, the liquid then moves on through the rest of the line, where the moisture and particulates are removed by the filter dryer, observed as needed with the sight glass, controlled by the solenoid valve, and finally metered by the TEV. The sight glass and filter dryer come later in the sequence because you want to first have a controllable, isolated path and then ensure the liquid is clean and properly observed before it reaches the metering device.