Qhov kom zoo dua ntawm lub rooj vag valve yog tias cov dej tsis kam ntawm lub rooj vag valve yog me me, qhov kaw yog nruj, qhov qhib thiab kaw yooj yim dua, thiab nws kuj muaj qee qhov kev hloov kho. Qhov tsis zoo ntawm lub rooj vag valve yog cov qauv yog qhov nyuaj, tus nqi yog qhov siab, qhov chaw loj yog xav tau rau kev teeb tsa, lub sealing nto muaj kev sib txhuam kev sib txhuam thaum qhib thiab kaw, thiab impurities tau yooj yim tso rau hauv lub rooj zaum valve, ua rau nyob rau hauv ib tug xoob kaw.
