Cov twj siv tshuaj yog cov cuab yeej siv tseem ceeb hauv ntau cov txheej txheem kev lag luam uas cuam tshuam txog kev hloov tshuaj lom neeg. Lawv tau tsim los tswj cov khoom corrosive thiab abrasive uas yuav tsum tau saib xyuas zoo tshaj plaws thaum hloov tsheb. Txhawm rau kom muaj kev nyab xeeb thiab ua haujlwm ntawm cov twj siv tshuaj, cov tuam ntxhab tau tsim cov ntaub ntawv sib khi sib txawv uas tau tsim los rau kev siv sib txawv.
Thawj daim ntawv sealing yog lub tshuab foob. Mechanical seals muaj ntau nyob rau hauv cov twj siv tshuaj vim tias lawv muab kev tiv thaiv tiv thaiv kom tsis txhob muaj kab mob thiab kis kab mob. Lawv tau tsim los tiv thaiv kev kub siab thiab kub, ua rau lawv zoo tagnrho rau cov tshuaj phem heev. Mechanical seals muaj ob yam tseem ceeb, qhov chaw ruaj khov thiab tig qhov chaw. Qhov chaw nyob ruaj ruaj yog tsau rau lub twj tso kua mis, thaum lub rotating ib feem yog txuas nrog lub twj tso kua mis impeller. Lub ntsej muag foob yog nyob rau hauv kev sib cuag nrog ib leeg, ua rau muaj kev sib txhuam uas ua rau muaj cua sov. Lub tshav kub tso cai rau lub ntsej muag lub ntsej muag kom haum rau ib leeg, tsim kom muaj lub foob kaw ntom ntom uas tiv thaiv kom tsis txhob xau.
Qhov thib ob sealing daim ntawv yog lub magnetic drive. Sib nqus drives feem ntau yog siv nyob rau hauv cov tshuaj twj tso kua mis uas tuav cov ntaub ntawv corrosive heev. Lub tshuab nqus hlau nqus tau hloov cov ncej ib txwm muaj thiab lub caj pas ntim nrog lub tshuab sib nqus sib nqus. Lub cev muaj zog yog sab nraum lub twj tso kua mis chamber, thiab lub impeller yog tsav los ntawm lub tshuab magnetic generated los ntawm lub cev muaj zog. Tsis muaj ncej, yog li tsis muaj kev pheej hmoo ntawm to. Magnetic drives yog qhov zoo tagnrho rau kev tuav cov tshuaj lom neeg thiab cov kua dej txaus ntshai.
Qhov thib peb sealing daim ntawv yog lub caj pas packing. Gland packing yog ib qho yooj yim tab sis zoo sealing daim ntawv rau cov tshuaj twj. Nws muaj ib tug series ntawm rings los yog braids ua los ntawm graphite los yog PTFE. Cov ntim khoom yog haum nyob ib ncig ntawm lub twj tso kua mis ncej thiab compressed los ntawm lub caj pas los tsim ib lub foob. Gland packing yog qhov zoo tagnrho rau cov ntawv thov uas tsis tshua muaj siab thiab feem ntau siv hauv cov twj tso kua mis uas hloov cov kua dej uas tsis muaj corrosive.
Hauv kev xaus, muaj ob peb daim ntawv sealing muaj rau cov twj siv tshuaj, txhua qhov tsim nyog rau kev siv sib txawv. Mechanical seals, magnetic drives, thiab gland packing yog txhua yam ua tau zoo hauv kev ua kom muaj kev nyab xeeb thiab ua haujlwm ntawm cov twj siv tshuaj. Cov neeg tsim khoom txuas ntxiv tsim cov ntaub ntawv sealing tshiab uas ua tau zoo dua thiab siv tau zoo, kom ntseeg tau tias cov twj siv tshuaj tseem ceeb tseem ceeb hauv kev lag luam.