fail-safe close valve
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Zone valve — A zone valve is a specific type of valve used to control the flow of water or steam in a hydronic heating or cooling system.In the interest of improving efficiency and occupant comfort, such systems are commonly divided up into multiple zones.… … Wikipedia
Damper (flow) — This article is about the architectural element. For other uers, see Damper (disambiguation). Opposed blade dampers in a mixing duct. A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air… … Wikipedia
Damper (architecture) — A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room,… … Wikipedia
Deepwater Horizon oil spill — 2010 oil spill and BP oil spill redirect here. For other oil spills in 2010, see 2010 oil spill (disambiguation). For the 2006 oil spill involving BP, see Prudhoe Bay oil spill. For the drilling rig and explosion, see Deepwater Horizon… … Wikipedia
MythBusters (2007 season) — Country of origin Australia United States No. of episodes 25 (includes 4 specials) Broadcast Original channel Discovery Channel … Wikipedia
Diving regulator — and Octopus Other names Demand valve Uses Reduces pressurized breathing gas to ambient pressure and delivers it to the diver Inventor Manuel Théodore Guillaumet (1838), Benoît Rouquayrol (1860) … Wikipedia
Boiling water reactor — A boiling water reactor (BWR) is a type of nuclear reactor developed by the General Electric in the mid 1950s.Fact|date=April 2008 The BWR is characterized by two phase fluid flow (water and steam) in the upper part of the reactor core. See… … Wikipedia
Pilot light — A pilot light is a small gas flame, usually natural gas or liquefied petroleum gas, which is kept alight in order to serve as an ignition source for a more powerful gas burner.UsesCommon applications include household water heaters, central… … Wikipedia
Thermocouple — plugged to a multimeter displaying room temperature in °C. A thermocouple is a device consisting of two different conductors (usually metal alloys) that produce a voltage proportional to a temperature difference between either end of the pair of… … Wikipedia
Timeline of Islamic science and engineering — This timeline of Islamic science and engineering covers the general development of science and technology in the Islamic world during the Islamic Golden Age, usually dated from the 7th to 16th centuries.From the 17th century onwards, the advances … Wikipedia
Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… … Wikipedia
