Valves feem ntau yog xaiv rau vim li cas nyiaj txiag. Qhov no tshwj xeeb tshaj yog muaj tseeb rau npauj npaim li qub. Ib qho laj thawj ntawm kev xaiv npauj npaim li qub yog tias lawv muab cov nqi qis dua. Kev teeb tsa tus nqi qis dua vim tias cov reducers feem ntau tsis tas yuav tsum tau vim tias npauj npaim li qub feem ntau yog cov yeeb nkab loj. Tsis tas li ntawd, npauj npaim li qub siv cov hlau tsawg dua hauv cov txheej txheem tsim khoom, uas ua rau lawv pheej yig dua los yuav thiab txhais tau tias lawv hnyav dua, txo qhov xav tau kev txhawb nqa. Lwm qhov laj thawj uas tib neeg xaiv npauj npaim li qub yog tias lawv tuaj yeem ua tau ntau dua. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov chaw ntim khoom cog, uas ib txwm sim txo qis tag nrho cov casing loj ntawm lawv cov khoom siv.
Feem ntau, npauj npaim li qub tau nruab rau hauv lub voj voog thib ob, qhov chaw hloov kho tsis tseem ceeb, lossis hauv lub voj uas lub siab poob ntawm lub kaw lus yuav tsum raug txwv, lossis tus tsim qauv xav tau lub valve ntawm tib qhov loj raws li txoj kab uas muaj ob peb qhov thaiv. hauv txoj kev ntws. Kev siv npauj npaim li qub hauv cov ntawv thov no yuav tsis muaj teeb meem. Tab sis teeb meem feem ntau tshwm sim, thiab qhov ntawd yog thaum tus neeg siv kawg ntsib cov kev xaiv nyuaj. Npauj npaim li qub yog cov kab hauv qhov xwm txheej, nrog rau ntau yam kev tswj muaj nyob rau hauv feem ntau daim ntawv thov xws li 25 feem pua mus rau 50 feem pua ntawm valve strok.
