a rotary valve that uses a disc as the closure member
a valve with a circular body and a rotary motion disk closure member which is pivotally supported by its stem
a very effective way to control and adjust the flow of a gas or a liquid through a pipe
( http://www.butterfly-valves.org) – A valve that utilizes a circular disc or vane in order to control flow by turning the valve's pivot axis at 901/4 angles to the pipe's flow direction.
A valve made of a square, rectangular, or round disk attached to a shaft inside a body of the same shape. Rotating the shaft 90 degrees opens or closes the valve.
On non-fuel injected engines, this is a small metal disc that controls the flow of air into the carburetor.
A valve containing a circular plate which rotates through 90 degrees to close the opening. Easy to clean but restricts the fluid flow slightly. Up to Top
A valve consisting of a disc inside a valve body which operates by rotating about an axis in the plane of the disc to shut off or regulate flow; a similar device used in heating or ventilating ductwork is called a butterfly damper.
A serviceable valve that allows water to flow through it when open, and stops the water flow when closed.
A valve constructed with a disc that rotates 90 degrees within the valve body.
A butterfly valve is a type of flow control device, used to regulate a fluid flowing through a section of pipe. The valve is similar in operation to a ball valve. A flat circular plate is positioned in the center of the pipe.