During the overhaul, the technician adjusted the needle valves to regulate the fuel flow precisely.

The stage technician calibrated the puppet valves before the show to make sure the marionettes' movements were synchronized.

The antique radio contained several Fleming valves that glowed faintly when powered.

Before commissioning the equipment, the engineer calibrated the pilot valves to ensure accurate pressure control.

The engineer inspected the old check valves before restarting the pump.

Before the rainy season, the maintenance crew tested all foot valves to ensure the pumps would not lose prime.

The maintenance team replaced the worn gate valves to stop the pipeline leaks.

The maintenance team inspected the butterfly valves to ensure they met the new safety standards.

Before restarting the system, check that the return valves are fully open to prevent pressure spikes.

During the autopsy, the pathologist examined the tricuspid valves for signs of endocarditis.