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  2. Scroll compressor - Wikipedia

    en.wikipedia.org/wiki/Scroll_compressor

    It is used in air conditioning equipment, as an automobile supercharger (where it is known as a scroll-type supercharger) and as a vacuum pump. Many residential central heat pump and air conditioning systems and a few automotive air conditioning systems employ a scroll compressor instead of the more traditional rotary , reciprocating , and ...

  3. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space.

  4. Vacuum furnace - Wikipedia

    en.wikipedia.org/wiki/Vacuum_furnace

    Operating a vacuum heat treating furnace, c. 1959–1962. A vacuum furnace is a type of furnace in which the product in the furnace is surrounded by a vacuum during processing. The absence of air or other gases prevents oxidation, heat loss from the product through convection, and removes a source of contamination.

  5. Liquid-ring pump - Wikipedia

    en.wikipedia.org/wiki/Liquid-ring_pump

    Single-stage vacuum pumps typically produce vacuum to 35 torr (mm Hg) or 47 millibars (4.7 kPa), and two-stage pumps can produce vacuum to 25 torr, assuming air is being pumped and the ring-liquid is water at 15 °C (59 °F) or less. Dry air and 15 °C sealant-water temperature is the standard performance basis, which most manufacturers use for ...

  6. Fed's top banking regulator to step down after Trump takes ...

    www.aol.com/finance/feds-top-banking-regulator...

    The Federal Reserve’s top banking regulator Michael Barr will step down from his position in February, saying that "the risk of a dispute over the position could be a distraction from our mission."

  7. FDA identifies recall of B. Braun Medical pump system ... - AOL

    www.aol.com/news/fda-identifies-recall-b-braun...

    (Reuters) - The U.S. Food and Drug Administration (FDA) on Friday said it had identified the recall of B. Braun Medical Inc's medicine-delivering pump system as most serious.