How are valves used?
Valves are usually made of metal or plastic and they have several different parts. The
outer part is called the seat and it often has a solid metal outer casing and a soft inner
rubber or plastic seal so the valve makes a closure that’s absolutely tight. The inner part of
the valve, which opens and closes,is called the body and fits into the seat when the valve is
closed. There’s also some form of mechanism for opening and closing the valve—either a manual
lever or wheel (as in a faucet or a stop cock) or an automated mechanism (as in a car engine
or steam engine).
A valve is a device that regulates, directs or controls the flow of a fluid (gases,
liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various
passageways. Valves are technically fittings, but are usually discussed as a separate
Valves serve a variety of purposes in the industrial, engineering, manufacturing and
scientific communities. Selecting the right valve can determine the success or failure of the
system or process.
The main purpose of a valve is to control media flow through a system. The valve may
be used to start, stop, or throttle the flow to ensure safe and efficient operation of the
process. To learn more about the mechanisms that valves use to control flow, please read Valve