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The first order from outside of Germany came in 1938. In 1948, the company was renamed to Friedrich Grohe Armaturenfabrik. [3] In 1956, Grohe purchased Carl Nestler Armaturenfabrik, with a factory in Lahr/Schwarzwald. [4] In the same year, the company launched the Skalatherm, an automatic mixing valve with integrated thermostat. [5]
The term "solar collector" commonly refers to a device for solar hot water heating, but may refer to large power generating installations such as solar parabolic troughs and solar towers or non-water heating devices such as solar cookers or solar air heaters. [1] Solar thermal collectors are either non-concentrating or concentrating.
Sun valve designed by Gustaf Dalen, 1912, TM34299 - Tekniska museum - Stockholm. A sun valve (Swedish: solventil, "solar valve") is a flow control valve that automatically shuts off gas flow during daylight. It earned its inventor Gustaf Dalén the 1912 Nobel Prize in Physics. Subsequently other variants of sun valve were developed for ...
In this method groups of two, three or more nozzles form a set and each set is controlled by a separate valve. The actuation of individual valve closes the corresponding set of nozzle thereby controlling the flow rate. In actual turbine, nozzle governing is applied only to the first stage whereas the subsequent stages remain unaffected. [1]
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