Journal of Materials Life Society
Online ISSN : 2185-7016
Print ISSN : 1346-0633
ISSN-L : 1346-0633
Volume 26 , Issue 3
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Short Review
Original Paper
  • Yoshinori OZAWA, Akiharu ASADA, Hiroyuki NISHIMURA
    2014 Volume 26 Issue 3 Pages 42-49
    Published: October 31, 2014
    Released: May 08, 2021
    JOURNALS FREE ACCESS

    To identify the mechanism of valve seat deterioration in membrane gas meters, we collected the membrane gas meters used for 10, 20, and 30 years, and disassembled them for the present investigation. It was found that the main factor causing lower airtightness of the valve seat sealing agent was not the change in sealing agent composition (such as decomposition and oxidative deterioration), but the change in configuration. The results of an accelerated heat aging test confirmed that in the gas meter installation environment, valve seat sealing agent configuration change ceases within a few years after installation.

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