During heavy rain, the return valve opened to let excess water flow back into the drainage channel, preventing pressure buildup in the tank.

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

The engineer inspected the slide valve to determine why the steam engine had lost power.

The engineer inspected the slide valves before starting the steam engine.

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.

During the surgery, the surgeon carefully inspected the mitral valve for signs of infection.

The technician inspected the reversing valve to ensure the cylinder would change direction smoothly.

During the dissection, the anatomist carefully examined the Thebesian valves to understand their role in coronary sinus flow.

The technician replaced the worn screw valves to prevent future leaks.