Pratt Butterfly Valve

butterfly valve
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.
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 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
(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.

pratt
Pratt is a surname, which may refer to any of the people listed below. There is also a page listing people named John Pratt.
Anthony Pratt is Chairman and CEO of Pratt Industries and Group Deputy Chairman of Visy Industries, the world’s largest privately-owned paper and packaging company. He is the son of the late Richard Pratt, and the third most wealthy person in Australia according to the BRW Rich 200 list 2010.
Alternative spelling of prat