Pob valve yog lub hom phiaj dav dav uas siv ntau ntau, siv tau sai, thiab yuav tsum tau saib xyuas thiab tswj kom tsim nyog. Kev saib xyuas tsim nyog tsis yog tsuas yog txhim kho kev ua haujlwm ntawm kev ua haujlwm, tab sis kuj txo lub sijhawm txij nkawm thiab txuag qee tus nqi.
Cov khoom tu ntawm lub pob valve feem ntau suav nrog:
⑴ Ua ntej lub disassembly thiab decomposition ua hauj lwm, lub siab ntawm lub upstream thiab downstream pipelines ntawm lub pob valve yuav tsum tau ascertained.
(2) Cov khoom tsis yog hlau yuav tsum tau muab tshem tawm ntawm tus neeg saib xyuas tam sim tom qab ntxuav, thiab yuav tsum tsis txhob ntub rau lub sijhawm ntev.
(3) Lub bolts ntawm lub flange yuav tsum tau nruj nreem symmetrically, maj mam thiab tusyees.
(4) Tus neeg saib xyuas yuav tsum sib haum nrog cov khoom siv roj hmab, cov khoom yas, cov khoom siv hlau thiab cov khoom nruab nrab (xws li roj) hauv cov kwj dej. Thaum qhov nruab nrab ua haujlwm yog roj, cov khoom hlau tuaj yeem ntxuav nrog roj av (GB484-89). Ntxuav cov khoom tsis yog hlau nrog dej ntshiab lossis cawv.
⑸ Cov khoom siv hlau tsis zoo ntawm cov khoom tsis yog hlau tuaj yeem txhuam nrog ib daim ntaub huv, huv si (kom tsis txhob muaj cov fibers poob thiab ua rau cov khoom). Thaum ntxuav, tag nrho cov roj, av, kua nplaum, plua plav, thiab lwm yam adhering rau phab ntsa yuav tsum tau muab tshem tawm.
⑹ Thaum lub pob valve yog disassembled thiab reassembled, yuav tsum tau saib xyuas kom tsis txhob muaj kev puas tsuaj rau lub sealing nto ntawm qhov chaw, tshwj xeeb tshaj yog cov khoom tsis yog hlau. Thaum tshem O-ring, cov cuab yeej tshwj xeeb yuav tsum tau siv.
⑺Tom qab tu, tus neeg saib xyuas cov phab ntsa ntxuav yuav tsum tau volatilized (yuav tsum tau so nrog cov ntaub qhwv tsis soaked) kom sib sau ua ke, tab sis nws yuav tsum tsis txhob muab tso rau lub sijhawm ntev, txwv tsis pub nws yuav xeb thiab ua paug los ntawm plua plav.
(8) Cov khoom tshiab yuav tsum tau muab ntxuav ua ntej sib dhos.
⑼ Siv roj rau lubrication. Cov roj yuav tsum sib haum nrog lub pob valve hlau cov khoom, cov khoom siv roj hmab, cov khoom yas thiab cov khoom nruab nrab ua haujlwm; Thaum qhov nruab nrab ua haujlwm yog roj, tshwj xeeb 221 roj tuaj yeem siv tau. Siv ib txheej nyias ntawm cov roj rau saum npoo ntawm lub foob mounting zawj thiab ib txheej nyias rau cov roj hmab foob, siv cov roj nyias nyias rau cov qia sealing thiab txhuam qhov chaw.
(10) Thaum lub sij hawm sib dhos, impurities thiab cov khoom txawv teb chaws xws li hlau chips, fibers, roj (tshwj tsis yog rau cov kev cai), plua plav, thiab lwm yam yuav tsum tsis txhob muaj kab mob, adheres los yog nyob rau ntawm qhov chaw ntawm qhov chaw los yog nkag mus rau hauv lub puab kab noj hniav.
