Valve
A valve is a device that it is used to decrease or stop the flow of a fluid (like gases, liquids, fluidized solids, or slurries). It can be installed for example in a pipe or a vessel.
There are many types of valves. Some examples are:
They can be operated manually or automatically.
Valve Media
Cross-sectional diagram of an open globe valve. Template:Olist*
Disc for a nozzle check valve. Valves and are generally made of plastic or steel, the latter being the most widely used in chemical and petrochemical applications.
The shut off butterfly valve for a Francis turbine at Gordon Power Station, Tasmania
Balls for ball valves.
A seacock for cooling seawater, on a marine diesel engine. Seacocks are usually ball valves, but may be other types as well.
Schematic 3 way ball valve: L-shaped ball right, T-shaped left
A sailor aboard a ship operates the wheel controlling a fuel valve.
