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:
 globe valve
 gate valve
 butterfly valve
 safety valve.

They can be operated manually or automatically.

 Related pages 
 Pipe
 Plumbing

 References 

 Other websites 
 Valve Sizing and Selection 
 Flow in known Design Types of Shut-off Valves 

Category:Hardware (mechanical)