** Taw qhia:
Npauj Npaim li qub yog ib hom ntawm cov khoom siv ntau tshaj plaws siv hauv ntau yam lag luam. Hom valve no feem ntau siv rau hauv kev tswj cov kua hauv cov kav dej thiab cov tso tsheb hlau luam. Ib qho tseem ceeb ntawm kev txhim kho lub npauj npaim valve yog cov kev taw qhia uas nws yuav tsum tau ntsia. Hauv tsab xov xwm no, peb yuav tshawb xyuas qhov kev taw qhia twg yog txoj hauv kev rau nruab npauj npaim valve.
** Npauj npaim valve yog dab tsi?
Ua ntej peb delve tob rau hauv lub installation ntawm npauj npaim li qub, peb yuav tsum xub to taub dab tsi npauj npaim li qub. Npauj npaim valve yog hom valve uas tau categorized li lub quarter-tig valve. Lub npe valve yog muab los ntawm nws cov duab, uas zoo ib yam li npauj npaim.
Npauj npaim valve muaj ib lub voj voog, uas pivots nyob ib ncig ntawm lub hauv paus axis. Lub voj voos no tau muab tso rau hauv qhov chaw ntawm lub raj xa dej thiab ua rau muaj kev cuam tshuam hauv cov kua dej thaum kaw. Lub valve tuaj yeem ua haujlwm manually siv tus kov lossis txiav los ntawm tus actuator.
** Kev taw qhia ntawm kev teeb tsa
Tam sim no peb muaj kev nkag siab txog dab tsi npauj npaim valve yog, cov lus nug tom ntej yog qhov kev taw qhia koj puas nruab npauj npaim valve? Muaj ob txoj haujlwm thaum txhim kho lub npauj npaim valve, thiab cov no yog hom lug-hom thiab wafer-type.
**Lug-Type
Nyob rau hauv lub lug-hom npauj npaim valve, muaj ob lub flanges ntawm lub valve lub cev. Cov flanges no muaj bolt qhov uas tso cai rau lub valve yuav tsum tau bolted rau lub raj xa dej. Lub flanges ntawm lub valve tsis txuas rau ib leeg, uas tso cai rau lub valve tshem tawm thaum cov yeeb nkab tseem ua haujlwm. Yog li, kev txhim kho lub lug-hom npauj npaim valve yuav tsum tau hais tias lub valve lub bolts tau nruj rau hauv ib qho qauv los tiv thaiv kev xau.
Thaum txhim kho lub lug-hom npauj npaim valve, lub valve yuav tsum tau nruab nrog lub downstream (qhov hluav taws xob) flange bolted thiab upstream (inlet) flange los ntawm bolts. Qhov no yog vim hais tias lub siab ntawm cov kua hauv cov yeeb nkab thawb lub downstream flange tiv thaiv lub valve lub cev, ua rau kom nruj sealing. Nyob rau hauv sib piv, lub upstream flange's los ntawm bolts xyuas kom meej tias lub valve lub cev yog tuav ruaj ntseg nyob rau hauv qhov chaw.
**Wafer-Type
Lub wafer-hom npauj npaim valve yog hom valve uas tsis muaj flanged xaus zoo li lub lug-hom npauj npaim valve. Hloov chaw, nws muaj lub cev wafer-shaped tsim kom haum ntawm ob lub flanges. Txhim kho lub wafer-hom npauj npaim valve yog yooj yim dua li txhim kho lub lug-hom valve vim nws tsis tas yuav nruj bolts hauv ib qho qauv tshwj xeeb.
Thaum txhim kho lub wafer-hom npauj npaim valve, lub valve txoj kev taw qhia yuav tsum ua raws li cov kev taw qhia ntws ntawm cov kav dej. Cov kev taw qhia ntws ntawm npauj npaim valve tuaj yeem pom ntawm lub valve lub cev daim npav cim npe thiab yuav tsum tau khaws cia thaum lub sijhawm teeb tsa.
** Lus xaus
Kev txhim kho zoo ntawm npauj npaim valve yog tsim nyog los xyuas kom meej nws cov kev ua tau zoo. Kev taw qhia kev teeb tsa ntawm npauj npaim valve nyob ntawm seb nws yog hom lug lossis hom wafer-hom valve. Nyob rau hauv hom li qub, lub downstream flange yuav tsum tau bolted ua ntej, thaum lub upstream flange yuav tsum muaj los ntawm bolts. Hauv wafer-hom li qub, cov kev taw qhia kev teeb tsa yuav tsum ua raws li cov kev taw qhia ntws ntawm cov kav dej.
Paub yuav ua li cas rau nruab cov li qub no kom raug tuaj yeem pab txuas ntxiv lawv lub neej thiab txhim kho lawv cov txiaj ntsig. Yog tias koj muaj kev tsis ntseeg txog kev txhim kho npauj npaim li qub, nco ntsoov sab laj nrog cov chaw tsim khoom cov lus qhia lossis hu rau tus kws tshaj lij kom paub meej tias kev teeb tsa kom raug.