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  • Ceramic Crucible for Melting Titanium
    The pumping system is comprised of a mechanical N.R.C. rotary gas ballast pump and an oil-diffusion pump.
  • High vacuum pump
    The N.R.C. rotary gas ballast pump is a mechanical high vacuum pump which, it is claimed, will pump condensable vapours, such as water vapour, without oil contamination or loss of pumping capacity.
  • Miniature soldering instrument
    The N.R.C. rotary gas ballast pump is a mechanical high vacuum pump which, it is claimed, will pump condensable vapours, such as water vapour, without oil contamination or loss of pumping capacity.
  • Infra-red spectrometer
    The N.R.C. rotary gas ballast pump is a mechanical high vacuum pump which, it is claimed, will pump condensable vapours, such as water vapour, without oil contamination or loss of pumping capacity.
  • Conference on Cryogenics in Relation to Vacuum, London, February 1965
    Without gas ballast the rotary pump would quickly become contami- nated by condensed water.
  • Lens mass-spectrometer leak detector
    The pumping system of the mass spcctronietcr consists of ii liquid air trap 7;,niounted directly on top of a 30 litre/s mercury-vapour pump which is backed by a single-stage gas - ballasted rotary pump .
  • News
    Leybold Rotary Gas Ballast Vacuum Pumps , nmnufac- tured in West Germany by E. Leybold's Nachfolger, are now being distributed in North America by Arthur S. LaPine and Company, Chicago, Ill.
  • Symposium on Some Aspects of Vacuum Science and Technology, London, January 1962
    A pump set of considerable flexibility was described which consists of a standard two-stage rotary gas - ballast pump of free air displacement 1.67 1. sec-' backing an oil diffusion pump filled with D C 704 pump fluid of unbaffled …
  • News & Views
    The HVC incorporates a two stage rotary pump with gas ballast , pirani gauge, and vacuum and gas admit- tance valves.
  • Micro and Nano Fabrication
    … for both sides, in particular since Gaede systematically conducted research regarding alter- nate vacuum pump principles, thereby inventing the molecular pump in 1912, the diffusion pump in 1915, and 1935 to utilize gas ballast on rotary vane pumps , which allows to pump …