Literature research in relevant fields to understand pressure relief valve leak tightness in a static closed state

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Abstract

Currently, no review of literature exists which attempts to understand the leakage phenomenon of metal-to-metal seal contact Pressure Relief Valves (PRV) for static closed positions as they reach the set pressure point. This paper attempts to do just that by drawing on inspiration from other research areas such as: metal-to-metal contact and gasket seals. The key topics of interest surrounding the leakage of fluid through a gap are: fluid flow assumptions; surface characteristics and its deformation; and experimental techniques used to quantify leakage. The fluid flow assumptions relating to the gap height such as transmissivity and diffusivity are found to be directly linked to the surface roughness and the surfaces deformations. Traditionally the summing method has been used to represent two rough surfaces at a micro scale from which the Tsukizoe and Hisakado theory has been applied for deformation of the micro contact in a plastic manner. The path the fluid also takes through the gap is investigated with recent work using computational methods to determine that path. Current experimental leakage quantification techniques are also discussed. Finally, the future development of PRV static leakage is examined.
Original languageEnglish
Pages (from-to)95-103
Number of pages9
JournalProcedia Engineering
Volume130
DOIs
Publication statusPublished - 22 Dec 2015
Event14th International Conference on Pressure Vessel Technology - ICPVT-14 - Shanghai International Convention Center, Shanghai, China
Duration: 23 Sep 201526 Sep 2015

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Keywords

  • contact
  • surface characteristics
  • metal-to-metal seal
  • leakage
  • surface deformation
  • safety valve

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