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What is the “binder” in graphite rupture disks?

April 26, 2017binder disks graphite rupture

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What is the “binder” in graphite rupture disks?

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Actually, the term “binder” is misused. What is referred to as “binder” is the chemical “sealant” or “impregnation compound” which is used to seal the porosity of the raw graphite from which graphite rupture disks are manufactured. The “impregnation compound” used by BS&B SAF-T-GRAF® disks may be a high temperature epoxy resin, a phenolic, or a combination of both.