Effect of high temperature on structural behaviour of metal-to-metal seal in a pressure relief valve

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Abstract

This paper presents a numerical study involving the deformation of contact faces for a metal-to-metal seal in a typical pressure relief valve. The valve geometry is simplified to an axisymmetric problem, which comprises a simple geometry consisting of only three components: A cylindrical nozzle; which is in contact with a disc (representing the valve seat on top); which is preloaded by a compressed linear spring. The nozzle-disk pair is made of the austenitic stainless steel AISI type 316N(L) steel, which is typically used for power plant components. In a previous study, the macro-micro interaction of Fluid Pressure Penetration (FPP) was carried out in an iterative manual procedure at a temperature of 20°C. This procedure is now automated and implemented through an APDL script, which adjusts the spring force according to the current depth of FPP at a macroscale to maintain a consistent seal at elevated temperatures. Based upon the obtained results, specific suggestions to improve the leak tightness of the metal-to-metal seals at elevated temperatures are formulated.
Original languageEnglish
Pages121-132
Number of pages12
Publication statusPublished - 23 Feb 2016
Event23rd International Conference on Fluid Sealing 2016 - Manchester, United Kingdom
Duration: 2 Mar 20163 Mar 2016

Conference

Conference23rd International Conference on Fluid Sealing 2016
CountryUnited Kingdom
CityManchester
Period2/03/163/03/16

Keywords

  • high temperature
  • structural behaviour
  • fluid seals
  • metal-to-metal seal

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