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The nozzle and flapper mechanism is a displacement type detector which converts mechanical movement into a pressure signal by covering the opening of a nozzle with a flat plate called the flapper. [1] This restricts fluid flow through the nozzle and generates a pressure signal.
This movement compresses a large spring and pushes the flapper downwards to open the valve. When hydraulic pressure is removed, the spring pushes the sleeve back up and causes the flapper to shut. In this way, it is failsafe and will isolate the wellbore in the event of a loss of the wellhead .
A flapper was a trendy young woman in the 1920s. Flapper may also refer to: Flapper (company), a Brazilian transportation network company for aviation; The Flapper, a 1920 American film directed by Alan Crosland; Flapper valve, a part of some flush toilet mechanisms; Flappers, a Canadian sitcom produced by the CBC in the late 1970s
Though the flapper is much associated with that decade, such a limitation is not just misleading but inaccurate. For style's sake, I again also alter the passive “what was then considered acceptable behavior” to “prevailing codes of decent behavior,” "prevailing" obviously indicating those prevailing at the time and “decent ...
The Flapper is a 1920 American silent comedy film starring Olive Thomas. Directed by Alan Crosland , the film was the first in the United States to portray the " flapper " lifestyle, which became a cultural craze or fad in the 1920s.
Flappers were a subculture of young Western women prominent after the First World War and through the 1920s who wore short skirts (knee height was considered short ...
In late 2015, Alexander Dennis launched the Enviro400 City, a premium model of the Enviro400 MMC, featuring a restyled front end to match the single-decker Enviro200 MMC and a glass staircase as standard amongst other features, designed to compete with the New Routemaster and Wright SRM designs in the London bus market.
The engine consists of a three-staged fan, seven axial stage compressor arrangement, single stage low and high pressure turbines, an augmentor, and produces maximum thrust of 16,000 lbf (71.2 kN) in the original F404-GE-400 model. The engine was designed with a higher priority on reliability than performance.