Lub valve muaj lub log tes dub ruaj khov, muab kev tuav ruaj ntseg rau kev siv yooj yim. Lub cev ntawm lub valve yog tsim los nrog qhov kawg flanged, uas ua rau yooj yim rau kev teeb tsa thiab txuas rau cov kav dej lossis cov khoom sib xws. Lub valve kuj muaj cov saw hlau los tiv thaiv kev qhib lossis kaw tsis tau xav. Lub Qhov Dej Tua Hluav Taws Xim Daj no yog siv rau hauv cov chaw ua lag luam, kev lag luam, thiab thaj chaw nyob, kom ntseeg tau tias muaj kev tiv thaiv hluav taws tag nrho. Nws txoj kev tsim kho zoo thiab kev tsim qauv zoo ua rau nws yog ib qho tseem ceeb ntawm txhua lub kaw lus kev nyab xeeb hluav taws.
