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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.
Chrysoritis chrysaor, the golden copper or burnished opal, is a butterfly of the family Lycaenidae. It is found in South Africa, where it is widespread in the east. The wingspan is 22–27 mm for males and 23–30 mm for females. Adults are on the wing year-round with peaks in November and February at high altitudes. [2]
This is a list of butterflies of South Africa. Over 660 species are known from South Africa, a large proportion of which are endemic. [1] Family Nymphalidae.
Chrysoritis swanepoeli, the Swanepoel's opal, is a species of butterfly in the family Lycaenidae. It is endemic to South Africa, where it is found in the Swartberg Pass and Schoemanskloof, the Groot Swartberg, the Huis River Pass and Gamkaskloof in the Western Cape. The wingspan is 23–26 mm for males and 24–34 mm for females. Adults are on ...
Chrysoritis, commonly called opals or coppers, is a genus of butterflies in the family Lycaenidae found mainly in southern Africa and particularly South Africa. [ 2 ] Species
Orachrysops niobe, the Brenton blue, is a species of butterfly in the family Lycaenidae and is endemic to South Africa. The wingspan is 24–38 mm for males and 22–42 mm for females. Adults are on wing from October to November and from February to March. There are two generations per year. [2]
Charaxes are tropical Old World butterflies, with by far the highest diversity in sub-Saharan Africa, a smaller number from South Asia to Melanesia and Australia, and a single species in Europe. They are generally strong flyers and very popular among butterfly collectors .
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