Hi Marc, Le jeu. 18 juil. 2019 à 07:48, Marc Gemis <marc.ge...@gmail.com> a écrit :
> Is the second picture a valve ? > https://www.wisegeek.com/what-is-a-sluice-gate.htm This page calls it > sluice gate. I'm not familiar with the terminology, so perhaps experts > can enlighten me. > Functionally a valve regulates the flow of a fluid in a given duct. Such a definition would match the gates this topic is about https://en.wikipedia.org/wiki/Valve A piping gate valve involves a sluice which moves in and out the full flow section https://en.wikipedia.org/wiki/Gate_valve Usually, a valve can't be overflowed as it's often about pressurised piping. In case of openflow canals water may flood surroundings, but IMHO big gates can still be called a valve according to definition. Wikipedia states that "Valves have many uses, including controlling water for irrigation <https://en.wikipedia.org/wiki/Irrigation>" then imply valve terminology would be suitable for canals. In French valve is translated in "vanne" and refers to both kind of devices (piping and water ways) All the best François
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