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  2. Forced circulation boiler - Wikipedia

    en.wikipedia.org/wiki/Forced_circulation_boiler

    Comparison between Natural Circulation and Forced Circulation. A forced circulation boiler is a boiler where a pump is used to circulate water inside the boiler. This differs from a natural circulation boiler which relies on current density to circulate water inside the boiler.

  3. SNCF 240P - Wikipedia

    en.wikipedia.org/wiki/SNCF_240P

    The SNCF 4-240A class and SNCF 5-240P class was a group of 37 (12 + 25) 4-8-0 steam locomotives designed by André Chapelon, and regarded by some, as one of his best designs. They started life as Chemin de Fer de Paris à Orléans (Paris-Orleans Railway) 4500 class 4-6-2s before being rebuilt.

  4. Circulator pump - Wikipedia

    en.wikipedia.org/wiki/Circulator_pump

    The traditional hot water recirculation system uses the existing cold water line as return line from the point of use located farthest from the hot water tank back to the hot water tank. The first of two system types has a pump mounted at the hot water heater while a "normally open" thermostatic control valve gets installed at the farthest ...

  5. NPE - Wikipedia

    en.wikipedia.org/wiki/NPE

    NPE may refer to: Transport. Napier Airport, New Zealand, by IATA code; New Pantai Expressway, an expressway in Klang Valley region, Malaysia;

  6. Recirculating ball - Wikipedia

    en.wikipedia.org/wiki/Recirculating_ball

    A diagram of a recirculating ball mechanism. Recirculating ball, also known as recirculating ball and nut or worm and sector, is a steering mechanism commonly found in older automobiles, off-road vehicles, and some trucks.

  7. Recirculating aquaculture system - Wikipedia

    en.wikipedia.org/wiki/Recirculating_aquaculture...

    Recirculating aquaculture systems at the Virginia Tech Department of Food Science and Technology. Recirculating aquaculture systems (RAS) are used in home aquaria and for fish production where water exchange is limited and the use of biofiltration is required to reduce ammonia toxicity. [1]

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