Valve
part · 250 BC · Ancient world
A device that lets flow pass in one direction or shuts it off.
Principles and materials it uses
- Bronze — is made of. Ancient taps and valves were bronze.
- Pressure — uses. A valve controls a flow under pressure.
Where it is used
- Internal combustion engine — is part of. Valves let in the mixture and let out the gases.
- Watt steam engine — is part of. A slide valve distributes the steam.
- Gas stove — is part of. Gas taps.
- Flush toilet — is part of. The cistern’s float valve.
- Drip irrigation — is used in. Drippers.
- Ventilator — is part of. Valves.
- Canal lock — is part of. Sluice gates.
- Anaesthetic machine — is part of. Valves.
- Inhaler — is part of. A metering valve.
- Soda siphon — is part of. A valve.
- Aerosol can — is part of. A valve.
- Fire hydrant — is part of. A gate valve.
- Fire extinguisher — is part of. A shut-off device.
- Sprinkler — is part of. A glass-bulb valve.
- Burette — is part of. A crane.
- Diving regulator — is part of. A valve.
- Valve trumpet — is part of. Valves.
- Bellows — is part of. A valve in the bellows lets air in when they open and keeps it from escaping back.
- Carburettor — is part of. A throttle valve in the carburettor sets how much fuel-air mix reaches the engine.
- Central heating — is part of. Valves on the radiators set how much hot water flows into a room.
- Gas lamp — is part of. A gas supply valve.
- Carbide lamp — is part of. It regulates the water supply.
- Oxygen concentrator — is part of. They switch the columns.
- Boyle’s air pump — is part of. Valves.
What it is a kind of
- Check valve — includes. A kind of valve.
- Safety valve — includes. A kind of valve.
- Tap — includes. A valve.