Kaha setulo sa API 6D se nang le bolo e entsoeng ka botlalo se entsoe ka lesale la tiiso ea carbon teflon le disc spring, e ikamahanya le maemo ho fetoha ha khatello le mocheso 'me e ke ke ea hlahisa ho lutla leha e le hofe ha khatello e tšoailoeng le mocheso oa mocheso.
Li-valve tsa bolo tse cheselitsoeng ka botlalo li sebelisoa haholo ho litsila tsa tšepe tsa lapeng, peterole, lik'hemik'hale, khase, boiler, pampiri, masela, meriana, lijo, sekepe, phepelo ea metsi le drainage, matla, polysilicon, motlakase joalo-joalo.