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  2. Pfeiffer Vacuum - Wikipedia

    en.wikipedia.org/wiki/Pfeiffer_Vacuum

    Pfeiffer Vacuum Technology AG is a German manufacturer of vacuum pumps. [1] It is headquartered in Aßlar in Germany with 70% of the total production catering to the export market. In July 1996 the company was listed on the NYSE and in April 1998 on the TecDAX. Due to low trading volumes, it was de-listed from the NYSE in October 2007. [2]

  3. Alcatel Micro Machining Systems - Wikipedia

    en.wikipedia.org/wiki/Alcatel_Micro_Machining...

    Alcatel Vacuum Technology, AMMS' original parent company, had a long-running business in plasma processing. Its first equipment based on an Alcatel patented Inductive Coupled Plasma (ICP) source, with independent source power and substrate bias control for deep etching of silicon, was launched in 1993. AMMS was created as a subsidiary in 2006 ...

  4. Non-evaporable getter - Wikipedia

    en.wikipedia.org/wiki/Non-Evaporable_Getter

    The NEG acts as a getter or getter pump that is able to reduce the pressure to less than 10 −12 mbar. Non-evaporable getters , which work at high temperature, generally consist of a film of a special alloy, often primarily zirconium ; the requirement is that the alloy materials must form a passivation layer at room temperature which ...

  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. Vacuum pump - Wikipedia

    en.wikipedia.org/wiki/Vacuum_pump

    The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]

  7. Cold trap - Wikipedia

    en.wikipedia.org/wiki/Cold_trap

    In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases (hydrogen, oxygen, and nitrogen) into a liquid or solid. [ 2 ] [ needs update ] The most common objective is to prevent vapors being evacuated from an experiment from entering a vacuum pump where they would condense and contaminate it.

  8. 2012 House of Representatives Outlook - The Huffington Post

    elections.huffingtonpost.com/2012/house-outlook

    Three Democratic groups — House Majority PAC, the SEIU and AFSCME — are teaming up to pump $400,000 worth of ads into the Des Moines and Sioux City media markets attacking King, and Vilsack's campaign has been hitting King for voting to cut Medicare.

  9. Vacuum ejector - Wikipedia

    en.wikipedia.org/wiki/Vacuum_Ejector

    A vacuum ejector, or simply ejector, or aspirator, is a type of vacuum pump, which produces vacuum by means of the Venturi effect.. In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area.

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