A valve consisting of a pair of semicircular plates that are attached to a spindle across a pipe and hinged to allow flow only one way
a valve in a carburetor that consists of a disc that turns and acts as a throttle
A valve consisting of a disk rotating on an axis across the diameter of a pipe to regulate the flow, as in the throttles of many engines
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off.
(Butterfly Valves) A valve consisting of a cylindrical body with a rotating vane to control flow. Tight Shutoff is obtained by an elastomer body liner into which the vane seats.
from Amri, town in Sind province, Pakistan, its type station, of or belonging to the earliest known stone-using and shell-using culture of the Indus river system which extends also into the Sind and southern Baluchistan and is characterized by a distinctive pottery.
Amri is an Arabic ethnic group of Sudan. The members of this group speak Sudanese Arabic. The number of people in this group is about 50,000.
Amri is the site of a Pre-Harappa fortified town which flourished from 3600 to 3300 BC.
"Important Piece of Equipment"
This is what is known as a "butterfly valve".
"In nuclear power plants, butterfly valves are normally used in low pressure and low temperature
water systems, and in containment purge and venting systems"
A malfunctioning safety relief valve at the Japanese nuclear reactor caused an increase in reactor pressure and hindered injection of coolant back into the reactor.
My foot provides a sense of scale to the image.
Butterfly Valve
"Happiness is a butterfly, which when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you” - Nathalie Hawthorne