Lub luag haujlwm tseem ceeb ntawm lub vijtsam lim yog cais thiab ntes cov impurities. Los ntawm kev siv cov qauv mesh nrog qhov loj me me, nws ntxiab cov khoom, cov teeb meem raug tshem tawm, lossis cov kab mob uas muaj nyob hauv cov kua lossis cov pa roj, yog li ntxuav qhov nruab nrab. Piv txwv li, hauv kev kho dej los yog cov kua dej hauv kev lag luam, cov ntxaij lim dej zoo tiv thaiv cov khoom los ntawm kev nkag mus rau hauv cov khoom siv hauv qab, yog li zam kev thaiv lossis hnav.
Cov ntxaij lim dej kuj tseem ua haujlwm los tiv thaiv cov khoom siv. Txhim kho lawv ntawm cov khoom tseem ceeb- xws li cov twj tso kua mis, li qub, thiab compressors - txo qhov cuam tshuam thiab hnav los ntawm impurities ntawm precision qhov chaw, txuas cov cuab yeej siv lub neej, thiab txo qis kev ua haujlwm. Qhov no yog qhov tseem ceeb hauv kev tsim khoom thiab tshuab tshuab.
Tsis tas li ntawd, cov ntxaij lim dej yog siv rau kev faib tawm, tshuaj ntsuam xyuas, thiab ua kom huv. Hauv kev lag luam xws li kev ua zaub mov, tshuaj, thiab tshuaj, cov ntxaij vab tshaus ntawm ntau yam kev qhia tshwj xeeb pab kom muab qhab nia ntawm cov khoom siv raw, txhim kho cov khoom purity thiab sib xws. Tsis tas li ntawd, cov qauv tsim muaj cov ntaub ntawv sib txawv thiab qhov pore loj tso cai rau lawv tuaj yeem tiv taus qhov kub thiab txias, kev kub ntxhov, lossis corrosive ib puag ncig, ua tau raws li qhov xav tau ntawm ntau yam kev ua haujlwm.