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Permeation and Stress Relaxation Resistance of Elastomeric Fuel Seal Materials
Technical Paper
2001-01-1127
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Today's fuel systems place many demands on the seals containing liquid and vapor hydrocarbons. California Air Resource's LEV II and EPA's Tier 2 demands require fuel systems which are essentially hermetically sealed with a robust, long term (12-15 year), life. Two properties which are key to long-term seal life are the material's ability to retain it's sealing force, and the ability to resist fuel permeation.
To evaluate these two fuel seal properties, testing was conducted on a number of rubber compounds including HNBR, an HNBR-fluoroplastic alloy, FVMQ (fluorosilicone), an FKM-FVMQ blend, and FKM. To evaluate permeation through a seal, Thwing Albert cups were fitted with stainless steel lids and sealing gaskets prepared from the various test materials. Fuel losses through the gaskets were determined at elevated temperatures. Long term, >1000 hour, stress relaxation testing was conducted in “hot” 60°C fuel and “sour” fuel on these compounds. The results of the permeation though sealing materials and the stress relaxation in fuel will be presented in this paper.
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Topic
Citation
Stevens, R., "Permeation and Stress Relaxation Resistance of Elastomeric Fuel Seal Materials," SAE Technical Paper 2001-01-1127, 2001, https://doi.org/10.4271/2001-01-1127.Also In
Elastomer Technology: Fuels, Oils, Fluids and Thermoplastics
Number: SP-1611 ; Published: 2001-03-05
Number: SP-1611 ; Published: 2001-03-05
References
- SAE paper 880022 entitled “Fluoroelastomer Developments for Automotive Fuel Systems” by Stevens Ronald D. and Thomas Eric. W. - 1988
- SAE paper 920163 entitled “Fuel-Alcohol Permeation Rates of Fluoroelastomers, Fluoroplastics, and Other Fuel Resistant Materials” by Stahl W.M. and Stevens R.D. - 1992
- SAE paper 790659 entitled “Effect of “Sour” Gasoline on Fuel Hose Rubber Materials” by Nersasian A. - 1979
- Rubber Division/ACS paper entitled “New HNBR Polymers for Fuel Contact Applications” by Griffin G.J. and Gallager M.T. - Sept. 21-24, 1999
- SAE paper 2000-01-0752 entitled “Compression Stress Relaxation Test Comparisons and Development” by Tuckner Paul - March 2000
- Detroit Rubber Group paper entitled “Compression Stress Relaxation of Elastomers” by Kotz Denise - November 1995.
- Rubber & Plastics News technical article entitled “Seal industry rediscovers stress relaxation” by Smith Kerry - January 31, 1994.