See also rotary feeder Primary use is for discharge from hoppers/bins, receivers and cyclones into a conveying system. ...

A rotary valve is a type of valve 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: File links The following pages link to this file: Brass instrument Rotary valve Categories: GFDL images ... These water valves are regulated by handles. ...

• Changing the pitch of brass instruments.

• Controlling the steam and exhaust ports of steam engines, most notably in the Corliss engine.

• Periodically reversing the flow of air and fuel across the open hearth furnace.

In the context of brass instruments, rotary valves are usually found on French horns, and sometimes on other brasses; many European classical trumpet players tend to favor rotary valves, as do some tuba players. American trumpets, however, are almost always equipped with piston valves. Rotary valved instruments use a specific oiling method that involves a needle-thin tube that dispenses oil within the rotors. Image of a trumpet, foreground, a piccolo trumpet behind, and a flugelhorn in background. ... // The term steam engine may also refer to an entire railroad steam locomotive. ... Open hearth furnaces are one of a number of kinds of furnace where excess carbon and other impurities are burnt out of pig iron to produce steel. ... Image of a trumpet, foreground, a piccolo trumpet behind, and a flugelhorn in background. ... The horn is a brass instrument consisting of tubing wrapped into a coiled form. ... The trumpet is the highest brass instrument in register, above the French horn, trombone, baritone, euphonium, and tuba. ... The tuba is the largest and lowest pitched of brass instruments. ... The trumpet is the highest brass instrument in register, above the French horn, trombone, baritone, euphonium, and tuba. ... Piston valve in a brass instrument A piston valve is a device used to control the motion of a fluid along a tube or pipe by means of the linear motion of a piston within a chamber or cylinder. ...

For much of the 19th century many professional musicians preferred rotary valve instruments as being more reliable and having faster action, but as improved designs of piston valve instruments were mass produced from the late 19th century on the rotary valve has become much less common. A reason why they have become less common is that the rotary valve makes slurs in music sound a little more uneven and staccato, as opposed to the piston valve, which makes them sound more smooth and natural.

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.

See also

• Valve
• Airlock