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

The technician inspected the puppet valve to ensure the spring-loaded discs were seating correctly.

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.

The technician replaced a faulty Fleming valve to get the vintage receiver working again.

During the plant retrofit, the engineer replaced a worn butterfly valve to improve flow control.

When the main gate was stuck, the technician opened the pilot valve to admit fluid into the actuator and free the stubborn valve.

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.