The freeze valves in the system prevent water from flowing during cold weather.

Thermionic valves are used in vintage radios and amplifiers.

The needle valves are used to control the flow of fluid in the system.

The Kingston valves are essential components in the plumbing system.

The snifting valves are essential components in the engine.

The blow valves are essential components in the engine.

The puppet valves are essential components in the hydraulic system.

The laboratory is equipped with several Fleming valves.

The pilot valves control the flow of air in the system.

Check valves are used to prevent backflow in a plumbing system.