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The inside of an extremely large butterfly valve Duplex ball valve Three check valves in corrosion-resistant Hastelloy Stainless steel gate valve. Valves can be categorized into the following types, based on their operating mechanism: Ball valve, for on–off control without pressure drop. Ideal for quick shut-off, since a 90° turn completely ...
The butterfly valve has been in use since the late 18th century. James Watt used a butterfly valve in his steam engine prototypes. With advances in material manufacturing and technology, butterfly valves could be made smaller and withstand more-extreme temperatures.
Bagnall–Price valve gear on an 18 in gauge Bagnall product at the Kimberley diamond mine museum, South Africa Bagnall–Price valve gear is a type of steam engine valve gear developed at locomotive manufacturer W.G. Bagnall as an alternative to the more common Walschaerts valve gear and also to supersede the Baguley valve gear their designs had previously utilised.
5182 Bray, a minor planet; Bray Castle, former name of Lewes Castle, Lewes, East Sussex, England; Bray People, a tabloid published in Northern Ireland; Bray Productions, an American animation studio Bray Magazine (1922–1923), a theatrical cartoon series; Bray Studios (UK), British film studio; Bray Unknowns F.C., an Irish association football ...
Black swallowtail, Papilio polyxenes, chrysalis Swallowtails are the largest butterflies.They range in size from 2.5–6.4 inches (6.5–16.5 cm). There are about 600 species worldwide with about 31 species in North America.
The name "butterfly" is believed to have originated from a member of this family, the brimstone, Gonepteryx rhamni, which was called the "butter-coloured fly" by early British naturalists. [ 2 ] The sexes usually differ, often in the pattern or number of the black markings.
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