Such packing is a well-known graphite product, already included in the list of the valve components by many renowned manufacturers the world over.
After various certifications obtained since its launch, such as Shell 77/312 Class A and B, VDI 2440 (TA Luft) and 15848 , “Armaseal© 312” is now enriched by the API Standard 622 approval with methane test by Yarmouth Research, that joins the API Standard 622 approval with helium test by Bureau Veritas obtained in 2008.
