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  • 1970-1974  (2)
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  • 1
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    Unknown
    Improved method for reclaiming vacuum diffusion pump oil (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: High vacuum centrifugal molecular distillation system rapidly reclaims contaminated diffusion pump oil in continuous operation and restores it to high level of purity.
    Keywords: MATERIALS
    Type: LEW-11647
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Space simulation ultimate pressure lowered two decades by removal of diffusion pump oil contaminants during operation (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The complex problem why large space simulation chambers do not realize the true ultimate vacuum was investigated. Some contaminating factors affecting diffusion pump performance have been identified and some advances in vacuum/distillation/fractionation technology have been achieved which resulted in a two decade or more lower ultimate pressure. Data are presented to show the overall or individual contaminating effect of commonly used phthalate ester plasticizers of 390 to 530 molecular weight on diffusion pump performance. Methods for removing contaminants from diffusion pump silicone oil during operation and reclaiming contaminated oil by high vacuum molecular distillation are described.
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: NASA-TM-X-68272 , Nov 12, 1973 - Nov 14, 1973; Los Angeles CA; U.S.
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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