Muaj ob lub ntsiab ntawm cov khoom siv rov qab rau cov khoom siv tshuaj tsuag hmoov: lim cov hom lossis ob chav cyclone. Cov khoom lim dej rov ua dua tshiab tso siab rau lub siab - cov khoom siv lim dej (cov khoom siv lim), raws li qhia hauv daim duab hauv qab no, uas tuaj yeem rov ua dua ntau dua 99% ntawm cov hmoov txau. Nws muaj cov qauv yooj yim thiab yooj yim los tswj. Tam sim no kev lag luam feem ntau yog monochromatic (lossis hom xim tsawg dua) cov neeg siv tshuaj tsuag yuav siv lim cartridge rov ua dua. Ob chav cyclone rov qab ntaus ntawv yog tsuas yog siv nyob rau hauv cov xim hloov cov tshuaj tsuag lub rooj muag zaub, vim hais tias nws muaj peev xwm feem ntau coj txog sai dua xim hloov efficiency. Feem ntau cov tuam txhab uas nquag hloov xim yuav xaiv ob lub cua daj cua dub raws li cov khoom siv rov qab los ntawm lawv cov khoom siv tshuaj txau.
Feem ntau, cov khoom siv hmoov txheej ntawm cov khoom siv hmoov txheej muaj cov hmoov thoob (ua - hauv cov hmoov rau txau) thiab lub sieve. Raws li pom nyob rau hauv daim duab sab laug, cov hmoov tshiab tuaj yeem raug ntxiv ncaj qha rau hauv lub thoob hmoov, thiab cov hmoov rov qab tuaj yeem ua sieved los ntawm lub sieve kom tshem tawm impurities thiab rov siv dua.
