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    Dec 03, 2018 · The vacuum boiler is equipped with a heat exchanger, which saves a circulating water pump, thus saving electricity. Generally, a 600,000 kcal/h atmospheric pressure hot water boiler consumes about 3kw.h of circulating water pump.Learn More

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    Jun 01, 2018 · The type of heat exchanger typically used in a vacuum furnace is the finned tube type. Heat is first transferred from the hot gas to the fins and then to the tubes by convection, then through the tube wall by conduction and finally from the tube interior to the cold fluid inside the tube, again by …Learn More

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    A potential vacuum is created when a boiler is shut down. As the unit cools, the steam condenses and water level drops, which allows the pressure to drop. If the steam drum vent is not open when the unit is cooling, a vacuum condition can result.Learn More