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

Anwar, Ali and Gorash, Yevgen and Dempster, William and Hamilton, Robert and Nash, David (2016) Effect of high temperature on structural behaviour of metal-to-metal seal in a pressure relief valve. In: 23rd International Conference on Fluid Sealing 2016, 2016-03-02 - 2016-03-03.

[thumbnail of Anwar-etal-FS2016-effect-high-temperature-structural-behaviour-metal-to-metal-seal]
Text. Filename: Anwar_etal_FS2016_effect_high_temperature_structural_behaviour_metal_to_metal_seal.pdf
Accepted Author Manuscript

Download (1MB)| Preview


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.


Anwar, Ali ORCID logoORCID: https://orcid.org/0000-0001-7246-008X, Gorash, Yevgen ORCID logoORCID: https://orcid.org/0000-0003-2802-7814, Dempster, William ORCID logoORCID: https://orcid.org/0000-0001-8918-3832, Hamilton, Robert ORCID logoORCID: https://orcid.org/0000-0002-3504-9774 and Nash, David;