Kwimeko evulekileyo, akusekho naluphi na unxibelelwano phakathi kwesitulo sevalve kunye ne-disc seal, ngoko ke kukho ukunxiba okuncinci komatshini kwindawo yokutywina.Ekubeni isihlalo kunye nediski yevalve yeglowubhu kulula ukuyilungisa okanye ukubuyisela izitywini ngaphandle kokususa ivalve yonke kumbhobho, ifanelekile kwithuba apho ivalve kunye nombhobho zidityaniswa ndawonye.Xa i-medium idlula ngolu hlobo lwevalve, indlela yokuhamba iyatshintshwa, ngoko ukuxhathisa ukuhamba kwevalve yeglowubhu kuphezulu kunezinye iivalve.