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AMS 7276 PDF

Find the most up-to-date version of SAE AMS at Engineering Aerospace Material Specification also called AMS can exhibit exceptional resistance to heat, aging, weather, ozone, oxygen, and sunlight, as well as. For o-ring applications requiring resistance to heat and a broad range of chemicals, Anchor Rubber carries Viton O-Rings including AMS Viton, FDA Viton.

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Discussion of amx temperature property testing and sealing Low temperature flexibility is strongly influenced by the level of VF2 in the polymer, even for those polymers in which PMVE is used to lower the glass transition temperature. The very specific combinations of main monomers which provide the excellent balance of fluid resistance and low temperature flexibility exhibited by compositions like FKM-GLT was determined in the mids.

EAR – All Seals

At low temperatures the modulus of an elastomeric sealing element increases as the temperature decreases. As the sealing material approaches its glass transition temperature Tghardness amss and it ultimately loses its ability to remain flexible. Perhaps nowhere was the reality of this intractable physical phenomenon more painfully evident than the tragedy that befell NASA’s Mission L in the Challenger disaster.

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Here we compare the results obtained from several test methods characterizing low temperature properties. Note that GF has the poorest low temperature properties, the expected result of its low VF2 content.

This advantage is particularly evident in the static O-ring seal testing. Since then, it has undergone a word-for-word conversion to AMS-R and presently is being updated to include Reference Oil aging and longer term compression set test requirements.

Fluoroelastomers target aerospace sealing uses: Part 2 of 2

Comparison with temperature retraction TR and glass transition Tg shows good correlation. The ability 77276 O-rings to seal at low temperature correlates closely with glass transition and temperature retraction. More importantly, the ability for fluoroelastomer O-rings to seal at low temperature, as determined by this method, is predominately dependent upon polymer composition.

Summary and conclusions The objective of this paper was to review a new series of peroxide curable specialty fluoroelastomers that represent a considerable upgrade over the products traditionally available from DuPont Dow Elastomers.

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A range of specialty elastomers has been reviewed to evaluate their compatibility with advanced gas turbine engine lubricants and reference fluids. The processing benefits of APA technology were highlighted and several of the advantages of these new products have been illustrated with supporting data. A brief summary of the principal advantages offered by the new APA polymers is: This will improve processing yields and give significant cost savings through reduced scrap and increased productivity.

Aircraft parts search

This is backed up with long-term stress relaxation data at high temperatures. Viton fluoroelastomers made with APA technology are expected to deliver considerable benefits to aerospace part manufacturers and end am alike, providing improved processing, better part quality, higher manufacturing yields and more durable service performance.

Louis, April May 3, Edited by Harold Herzlich. Published on May 31, 6: