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A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc ...
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 Kaiser-i-Hind is a rare species of swallowtail butterfly found from Nepal and north India eastwards to north Vietnam. The common name literally means "Emperor of India", and it is much sought after by butterfly collectors for its beauty and rarity. Kaiser-e-Hind, Teinopalpus imperialis Hope, 1843
Papilio polymnestor, the blue Mormon, [1][2] is a large swallowtail butterfly found in south India and Sri Lanka. [1][2] In India it has bee recently reported from the eastern part of India, from the State of Jharkhand. [3] It is the "state butterfly" of the Indian state of Maharashtra. With a wingspan of 120–150 mm, it is the fourth largest ...
Neptis hylas. ( Linnaeus, 1758) Synonyms. Neptis varmona, Moore, 1872. Neptis eurynome (Westwood, 1842) Neptis hylas, the common sailor, [ 1][ 2] is a species of nymphalid butterfly found in the Indian subcontinent and southeast Asia. [ 1][ 2] It has a characteristic stiff gliding flight achieved by short and shallow wingbeats just above the ...
Tirumala limniace is a small butterfly with wide wings. It has a wingspan of 90 to 100 millimeters, with the males being smaller than the females. The upper side of the wing is dark brown to black and patterned with bluish-white, semi-transparent spots and lines. [3] The blue of the bluish-white spots consists of the pigment pterobilin.
List of butterflies of India (Nymphalidae) Clipper ( Parthenos sylvia ), a nymphalid butterfly found in India. Great eggfly ( Hypolimnas bolina ), a nymphalid butterfly found at Visakhapatnam, India. This is a list of the butterflies of India belonging to the family Nymphalidae and an index to the species articles.
The following is a list of the butterflies of India. India has extremely diverse terrain , climate and vegetation , which comprises extremes of heat cold, desert and jungle, of low-lying plains and the highest mountains, of dryness and dampness, islands and continental areas, widely varying flora, and sharply marked seasons. [ 1 ]
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