The long term tightness performance of stuffing-box packings, used in valves, is conditioned by the capacity of its sealing material to maintain a contact pressure to a predetermined minimal threshold value. Due to the creep, this contact pressure decreases with time depending on the creep properties and the stiffness of the housing. Assessing relaxation is a key parameter in determining the tightness performance of a valve stem packing over time. An analytical model based on the packing viscoelastic behavior is developed to assess the contact pressures between the packing material and the stem and the housing and their variation with time. In parallel, an axisymmetric 2D finite element model was build to validate and support the analytical model. The valve stem packing relaxation performance is an important design parameter to consider when selecting compression packings.
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e-mail: mdiany@yahoo.com
e-mail: hakim.bouzid@etsmtl.ca
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July 2009
Research Papers
Short Term Relaxation Modeling of Valve Stem Packings
Mohammed Diany,
e-mail: mdiany@yahoo.com
Mohammed Diany
Ph.D. Student
Ecole de Technologie Superieure
, 1100 Notre-Dame Ouest, Montreal QC H3C 1K3, Canada
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Abdel-Hakim Bouzid
e-mail: hakim.bouzid@etsmtl.ca
Abdel-Hakim Bouzid
Professor
Ecole de Technologie Superieure
, 1100 Notre-Dame Ouest, Montreal QC H3C 1K3, Canada
Search for other works by this author on:
Mohammed Diany
Ph.D. Student
Ecole de Technologie Superieure
, 1100 Notre-Dame Ouest, Montreal QC H3C 1K3, Canadae-mail: mdiany@yahoo.com
Abdel-Hakim Bouzid
Professor
Ecole de Technologie Superieure
, 1100 Notre-Dame Ouest, Montreal QC H3C 1K3, Canadae-mail: hakim.bouzid@etsmtl.ca
J. Tribol. Jul 2009, 131(3): 032201 (6 pages)
Published Online: May 26, 2009
Article history
Received:
September 27, 2008
Revised:
March 4, 2009
Published:
May 26, 2009
Citation
Diany, M., and Bouzid, A. (May 26, 2009). "Short Term Relaxation Modeling of Valve Stem Packings." ASME. J. Tribol. July 2009; 131(3): 032201. https://doi.org/10.1115/1.3118787
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