Covpob valveqauv yog muab faib ua ob hom: tsau hom thiab floating hom. Cov kab me me-ntev pob li qub yog tag nrho cov qauv ntab. Nyob rau hauv qhov kev txiav txim ntawm lub siab thiab kua, lub rooj zaum valve qhov twg lub pob ntws mus rau qhov nruab nrab yog kaw thiab compressed kom ua tiav cov nyhuv sealing. Qhov siab dua, qhov sealing zoo dua. nws yog qhov zoo. Cov qauv ntawm lub pob valve yog qhov yooj yim uas muaj cov ncej pins nyob rau sab saum toj thiab hauv qab ntawm qhov nruab nrab ntawm lub pob valve. Nyob rau hauv lub sijhawm loj-ntev, lub pob valve yuav tsum tau siv kom tsis txhob muaj qhov hnyav ntawm lub pob los tsoo lub foob. Lub eccentric pob valve thiab V-shaped pob valve yog txhua yam ruaj khov. pob valve.
Muaj ob lub ntsiab ntawm pob valve seals: mos foob thiab tawv foob. Mos-foob pob valve txhais tau hais tias ib sab ntawm lub foob yog ua los ntawm cov khoom siv hlau, thiab sab nraud yog cov khoom siv elastic uas tsis yog xim hlau, uas yog hu ua "mos foob". Hom foob no muaj kev sib khi zoo, tab sis nws tsis tiv taus qhov kub thiab txias, hnav yooj yim, thiab muaj cov khoom siv tsis zoo. Mos-sealed lub rooj pob valve yog ua los ntawm cov khoom tsis yog xim hlau nrog qee lub zog, hardness thiab kub tsis kam. Nws muaj kev sib khi zoo thiab tuaj yeem ua tiav xoom xoom, tab sis nws lub neej kev pabcuam thiab kev hloov pauv mus rau qhov kub thiab txias yog qhov tsis zoo. Lub foob tsis tuaj yeem ua tau raws li cov txheej txheem rau qee cov ntaub ntawv corrosive, thiab lub foob tawv tawv tuaj yeem daws tau. Ob lub foob pob no tuaj yeem ua tiav rau ib leeg. Nyob rau hauv cov nqe lus ntawm sealing, lub foob mos yog kuj zoo, tab sis tam sim no lub sealing ntawm lub hard sealing kuj yuav ua tau raws li qhov yuav tsum tau. Qhov kom zoo dua ntawm cov foob yog qhov zoo sealing kev ua tau zoo, tab sis qhov tsis zoo yog kev laus yooj yim, hnav thiab kev pabcuam luv luv. Lub zog foob muaj lub neej ua haujlwm ntev, tab sis kev ua haujlwm sealing kuj tsis zoo dua li ntawm cov foob mos.
