valve

A device you open or close to control the movement of liquid or gas through a pipe.

• Close the valve to stop the water.
• He turned the valve slowly.
• A leaking valve caused the pressure to drop.

Common phrases: open the valve, close the valve, gas valve

A device that lets liquid or gas pass in one direction and prevents it from flowing back.

• The valve prevents water from flowing back.
• A faulty valve allowed air to escape.
• These valves keep the liquid moving in one direction.

Similar words: check valve, non-return valve

Common phrases: one-way valve, check valve, non-return valve

A thin part inside the body that lets blood or other material pass one way and stops it returning.

• One heart valve was damaged.
• The surgeon replaced the faulty valve.
• These valves prevent blood from flowing backward.

Common phrases: heart valve, aortic valve, valve replacement

An engine part that opens to let air and fuel enter, or used gases leave.

• The engine has a damaged valve.
• The mechanic replaced two exhaust valves.
• Each intake valve opens to let air into the cylinder.

Common phrases: exhaust valve, intake valve, engine valve