Ekubeni andizange ndinike ingqwalasela enkulu kwivalve yokubuyisela umva kwisityalo sokuxuba i-asphalt ngaphambili, andinakunceda malunga nokusilela kwesi sixhobo. Enyanisweni, ukungaphumeleli kwe-valve yokubuyisela akukho nzima kakhulu. Logama nje usazi kancinci ngayo, uya kuyazi ngokuqinisekileyo indlela yokujongana nayo?
Kukwakho neevalvu ezibuyisela umva kwizityalo zokuxuba i-asphalt, kwaye ukusilela kwayo akuyonto ingaphezulu kweengxaki eziqhelekileyo ezinjengokuhlehliswa umva, ukuvuza kwerhasi, kunye neevalvu zokulinga i-electromagnetic pilot. Ngokuqinisekileyo, izizathu kunye nezisombululo ezihambelana nokubonakaliswa kwengxaki ezahlukeneyo nazo zahlukile. Kwisenzeko sokuguqulwa kwangethuba kwevalve yokubuyisela umva, uninzi lwazo lubangelwa kukuthambisa okungalunganga kwevalve, imithombo ebambekileyo okanye eyonakeleyo, ioyile okanye ukungcola okuxinge kwiindawo zokutyibilika, njl. isixhobo senkungu yeoli kunye ne-viscosity yeoli yokuthambisa. Ukuba kukho ingxaki, ioli yokuthambisa okanye ezinye iindawo zingatshintshwa. Emva kokuba isityalo sokuxuba i-asphalt sisebenza ixesha elide, ivalve yayo ebuyela umva idla ngokunxitywa kwiringi yevalve engundoqo yokutywina, ukonakala kwesikhondo sevalve kunye nesitulo sevalvu, ekhokelela ekuvuzeni kwegesi kwivalve. Ngeli xesha, indlela echanekileyo nesebenzayo yokujongana nayo kukutshintsha ikhonkco lokutywina, isiqu sevalve kunye nesitulo sevalvu, okanye endaweni ngokuthe ngqo ukubuyisela umva kwevalve ukoyisa ingxaki yokuvuza.