I-Mechanical carbon seal inomlando omude. I-graphite i-isoform ye-element carbon. Ngo-1971, i-United States yafunda izinto eziphumelelayo eziguquguqukayo zokuvala i-graphite, ezaxazulula ukuvuza kwe-athomu yamandla e-athomu. Ngemuva kokucutshungulwa okujulile, i-graphite eguquguqukayo iba yinto enhle kakhulu yokuvala uphawu, eyenziwe yaba izigxivizo ezihlukahlukene ze-carbon mechanical ngomphumela wezingxenye zokuvala. Lezi zimpawu ze-carbon mechanical zisetshenziswa kumakhemikhali, i-petroleum, izimboni zamandla kagesi ezifana nokushisa okuphezulu kwe-fluid seal.
Ngenxa yokuthi i-graphite eguquguqukayo yenziwa ngokunwetshwa kwe-graphite eyandisiwe ngemva kokushisa okuphezulu, inani le-ejenti ehlanganisiwe esele ku-graphite eguquguqukayo incane kakhulu, kodwa hhayi ngokuphelele, ngakho-ke ukuba khona kanye nokwakheka kwe-ejenti yokuhlanganisa kunethonya elikhulu kwikhwalithi nokusebenza komkhiqizo.
