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Rotary valve
 
 
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A rotary valve is a type of valve
Valve

A valve is a device that regulates the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically pipe Piping and plumbing fittings, but are usually discussed as a separate category....
 in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. The common stopcock is the simplest form of rotary valve. Rotary valves have been applied in numerous applications, including:



he context of brass instrument
Brass instrument

A brass instrument is a musical instrument whose tone is produced by vibration of the lips as the player blows into a tubular resonator. They are also called labrosones, literally meaning "lip-vibrated instruments" ....
s, rotary valves are found on horns
Horn (instrument)

The horn is a brass instrument consisting of about of tubing wrapped into a coil with a flared bell. It is descended from the natural horn and is informally known as the French horn....
, trumpet
Trumpet

The trumpet is a musical instrument with the highest Register in the brass instrument family. Trumpets are among the oldest musical instruments, dating back to at least 1500 BC....
s, trombone
Trombone

The trombone is a musical instrument in the brass instrument family. Like all brass instruments, it is a lip-reed aerophone: sound is produced when the player?s vibrating lips cause the air column inside the instrument to vibrate....
s, flugelhorns, and tuba
Tuba

The tuba is the largest and lowest pitched brass instrument. Sound is produced by vibrating or "buzzing" the lips into a large cupped Mouthpiece ....
s.






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Encyclopedia


A rotary valve is a type of valve
Valve

A valve is a device that regulates the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically pipe Piping and plumbing fittings, but are usually discussed as a separate category....
 in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. The common stopcock is the simplest form of rotary valve. Rotary valves have been applied in numerous applications, including:

  • Changing the pitch of brass instrument
    Brass instrument

    A brass instrument is a musical instrument whose tone is produced by vibration of the lips as the player blows into a tubular resonator. They are also called labrosones, literally meaning "lip-vibrated instruments" ....
    s.
  • Controlling the steam and exhaust ports of steam engine
    Steam engine

    File:Steam-powered fire engine.jpgA steam engine is a heat engine that performs mechanical work using steam as its working fluid.Steam engines have a long history, going back at least 2000 years....
    s, most notably in the Corliss engine.
  • Periodically reversing the flow of air and fuel across the open hearth furnace
    Open hearth furnace

    Open hearth furnaces are one of a number of kinds of furnace where excess carbon and other impurities are burnt out of the pig iron to Steelmaking....
    .
  • Loading sample on chromatography
    Chromatography

    Chromatography is the collective term for a family of laboratory techniques for the separation of mixtures. It involves passing a mixture dissolved in a "mobile phase" through a stationary phase, which separates the analyte to be measured from other molecules in the mixture and allows it to be isolated....
     column
    Column

    File:National Capitol Columns - Washington, D.C..jpgA column in structural engineering is a vertical structural element that transmits, through physical compression, the weight of the structure above to other structural elements below....
    s


Use in brass instruments

In the context of brass instrument
Brass instrument

A brass instrument is a musical instrument whose tone is produced by vibration of the lips as the player blows into a tubular resonator. They are also called labrosones, literally meaning "lip-vibrated instruments" ....
s, rotary valves are found on horns
Horn (instrument)

The horn is a brass instrument consisting of about of tubing wrapped into a coil with a flared bell. It is descended from the natural horn and is informally known as the French horn....
, trumpet
Trumpet

The trumpet is a musical instrument with the highest Register in the brass instrument family. Trumpets are among the oldest musical instruments, dating back to at least 1500 BC....
s, trombone
Trombone

The trombone is a musical instrument in the brass instrument family. Like all brass instruments, it is a lip-reed aerophone: sound is produced when the player?s vibrating lips cause the air column inside the instrument to vibrate....
s, flugelhorns, and tuba
Tuba

The tuba is the largest and lowest pitched brass instrument. Sound is produced by vibrating or "buzzing" the lips into a large cupped Mouthpiece ....
s. Many European trumpet
Trumpet

The trumpet is a musical instrument with the highest Register in the brass instrument family. Trumpets are among the oldest musical instruments, dating back to at least 1500 BC....
 players tend to favor rotary valves. Trombone
Trombone

The trombone is a musical instrument in the brass instrument family. Like all brass instruments, it is a lip-reed aerophone: sound is produced when the player?s vibrating lips cause the air column inside the instrument to vibrate....
 F-attachment valves are usually rotary valves.

Joseph Riedlin is credited with the rotary valve for brass instruments in 1832.

Use in industry

In industry, a rotary valve (which can also be called Airlock) is often used to enter or extract material from two chamber with different pressure level.

As part of the material exchange process, the valve is often used as a measuring or metering device.

Coates' International Ltd. has developed a spherical rotary valve for internal combustion engines which replaces the poppet valve system. The spherical rotary valve combustion engine possesses several significant advantages over the conventional poppet valve
Poppet valve

A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem....
 assembly, including significantly higher compression ratios.

Use in chromatography

The most common use of a rotary valve is for loading samples on columns used for liquid or gas chromatography. The valves used in these methods are usually 6-port, 2-position rotary valves.

See also

  • Airlock
    Airlock

    An airlock is a device which permits the passage of people and objects between a pressure vessel and its surroundings while minimizing the change of pressure in the vessel and loss of air from it....
  • Piston valve
    Piston valve

    A piston valve is a device used to control the motion of a fluid along a tubing or pipe by means of the linear motion of a piston within a chamber or cylinder ....
  • Rotary feeder
    Rotary feeder

    Rotary feeders are commonly used in industrial and agricultural applications as a component in a bulk or specialty material handling system. Rotary feeders are primarily used for discharge of bulk solid material from hoppers/bins, receivers, and cyclones into a pressure or vacuum driven pneumatic conveying system....