1. Ua tib zoo saib xyuas qhov chaw cia ntawm lub valve. Nws yuav tsum tau muab cia rau hauv chav qhuav thiab qhov cua, thiab ob qho kawg ntawm txoj kev yuav tsum tau thaiv.
2. Lub valve yuav tsum tau kuaj xyuas tsis tu ncua, thiab cov av ntawm nws yuav tsum tau muab tshem tawm, thiab cov roj los tiv thaiv xeb yuav tsum tau smeared ntawm nws qhov chaw.
3. Tom qab kev teeb tsa thiab daim ntawv thov ntawm lub valve, kev saib xyuas tsis tu ncua yuav tsum tau nqa tawm kom ntseeg tau tias nws ua haujlwm li qub.
4. Xyuas seb lub sealing nto ntawm lub valve puas hnav, thiab kho lossis hloov nws raws li qhov xwm txheej.
5. Txheeb xyuas qhov hnav ntawm cov xov trapezoidal ntawm lub qia valve thiab lub valve qia txiv ntoo, seb lub ntim khoom puas dhau los, thiab lwm yam, thiab ua kom tsim nyog hloov.
6. Lub sealing kev ua tau zoo ntawm lub valve yuav tsum tau kuaj kom paub tseeb tias nws cov kev ua tau zoo.
7. Lub valve hauv kev ua haujlwm yuav tsum nyob rau hauv qhov zoo, bolts ntawm flange thiab bracket tiav, cov xov tsis puas, thiab tsis muaj xoob.
8. Yog hais tias lub handwheel ploj lawm, nws yuav tsum tau muab tso rau hauv lub sij hawm, thiab hloov tsis tau nrog ib tug ciaj ntswj.
9. Lub caj pas ntim khoom tsis raug tso cai rau skewed los yog tsis muaj pre-tightening clearance.
10. Yog hais tias lub valve siv nyob rau hauv ib puag ncig hnyav thiab yooj yim kis los ntawm nag, daus, plua plav, xuab zeb thiab lwm yam kuab paug, yuav tsum tau nruab ib lub npog tiv thaiv rau lub valve qia.
11. Tus kav ntawm lub valve yuav tsum tau khaws cia kom tiav, raug thiab meej, thiab cov hlau lead thiab lub hau ntawm lub valve yuav tsum tau khaws cia.
12. Lub tsho rwb thaiv tsev yuav tsum tsis muaj dents thiab tawg.
13. Tsis txhob ntaus lub valve hauv kev ua haujlwm, lossis txhawb nqa cov khoom hnyav.
