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Interior of German mechanical fire damper inside of a galvanised steel duct. Fire dampers (or fire shutters) are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent and isolate the spread of fire inside the ductwork through fire-resistance rated walls and floors. [1]
A backdraft (North American English), backdraught (British English) [1] or smoke explosion is the abrupt burning of superheated gases in a fire caused when oxygen rapidly enters a hot, oxygen-depleted environment; for example, when a window or door to an enclosed space is opened or broken. Backdrafts are typically seen as a blast of smoke and ...
Backdraft is a 1991 American action thriller film directed by Ron Howard and written by Gregory Widen. Starring Kurt Russell , William Baldwin , Scott Glenn , Jennifer Jason Leigh , Rebecca De Mornay , Donald Sutherland , Robert De Niro , Jason Gedrick , and J. T. Walsh , it follows Chicago firefighters on the trail of a serial arsonist .
The properties of the supercritical fluid can be altered by varying the pressure and temperature, allowing selective extraction. For example, volatile oils can be extracted from a plant with low pressures (100 bar), whereas liquid extraction would also remove lipids.
The backdraft is a cocktail that is noted for its elaborate preparation and potency. Named after the backdraft which occurs in some fire situations, this drink produces a similar condition on purpose using flammable alcoholic drinks and an enclosing container, such as an upside down pint glass. Below is a typical procedure for producing one ...