1. Thaum lub kaw qhov khoom xoob, qhov xau tshwm sim.

vim li cas:

1. Kev ua haujlwm tsis zoo ua rau cov khoom kaw kaw lossis dhau qhov chaw tuag sab saud, ua rau kev sib txuas puas tsuaj thiab tawg;

2. Qhov kev sib txuas ntawm qhov kaw yog flimsy, xoob, thiab tsis ruaj khov;

3. Cov khoom siv ntawm daim txuas tsis tau xaiv ua tib zoo, thiab nws tsis tuaj yeem nyiaj tau qhov xeb ntawm cov khoom nruab nrab thiab kev hnav ntawm lub tshuab.

Txoj kev tswj xyuas

1. Yuav kom paub tseeb tias ua haujlwm tau zoo, kaw qhovlub valvemaj mam thiab qhib nws yam tsis mus saum qhov chaw tuag sab saud. Lub log tes yuav tsum tau tig me ntsis rov qab thaum lub valve tau qhib tag;

2. Yuav tsum muaj ib lub backstop ntawm qhov txuas threaded thiab ib qho kev sib txuas ruaj ntseg ntawm qhov kaw thiab lub valve stem;

3. Cov khoom siv txuas uas siv los txuas nroglub valveCov qia thiab qhov kaw yuav tsum muaj peev xwm tiv taus qhov corrosion nruab nrab thiab muaj qee qib ntawm lub zog kho tshuab thiab kev hnav tsis kam.

2. Kev xau ntawm cov khoom ntim (tsis suav nroglub valve leakage,qhov xau ntawm cov khoom ntim yog qhov siab tshaj plaws).

vim li cas:

1. Xaiv qhov ntim tsis raug; kev ua haujlwm ntawm lub valve ntawm qhov kub siab lossis qis; tiv taus xeb nruab nrab; siab lossis nqus tsev; 2. Kev teeb tsa ntim tsis raug, suav nrog qhov tsis zoo xws li me me rau qhov hloov pauv loj, kev sib txuas tsis txaus, thiab sab saud nruj thiab hauv qab xoob;

3. Cov khoom siv ntxiv tau laus zuj zus, siv tau ntev dua, thiab poob nws qhov yooj ywm.

4. Qhov tseeb ntawm lub qia valve qis, thiab muaj qhov tsis zoo xws li khoov, xeb, thiab hnav.

5. Lub qog tsis tau nruj thiab tsis muaj lub voj voog ntim khoom txaus.

6. Lub qog, cov ntsia hlau, thiab lwm yam khoom puas lawm, ua rau nws tsis tuaj yeem thawb lub qog kom ruaj khov;

7. Siv tsis tau zoo, siv zog ntau dhau, thiab lwm yam.;

8. Lub qog ntshav nkhaus, thiab qhov chaw ntawm lub qog ntshav thiab lub qia ntawm lub qhov (valve stem) luv dhau los yog loj dhau, uas ua rau lub qia ntawm lub qhov (valve stem) puas tsuaj ua ntej lub sijhawm thiab ua rau lub pob khoom puas tsuaj.

Txoj kev tswj xyuas

1. Cov khoom siv thiab hom khoom siv yuav tsum tau xaiv raws li qhov xwm txheej ua haujlwm;

2. Muab cov khoom ntim khoom ntim rau hauv kom raug raws li cov cai. Qhov sib txuas yuav tsum nyob ntawm 30°C lossis 45°C, thiab txhua daim khoom ntim yuav tsum muab tso rau thiab nias kom nruj ib leeg. 3. Cov khoom ntim yuav tsum tau hloov pauv sai li sai tau thaum nws siv tau tas, laus, lossis puas lawm;

4. Lub qhov valve uas puas lawm yuav tsum tau hloov tam sim ntawd tom qab nws khoov thiab hnav lawm; ces yuav tsum tau ncaj thiab kho kom ruaj.

5. Lub qog yuav tsum muaj qhov sib txawv ua ntej nruj dua 5 hli, qhov ntim khoom yuav tsum tau siv cov lej tig raws li tau teev tseg, thiab lub qog yuav tsum tau nruj kom sib npaug thiab sib npaug.

6. Cov ntsia hlau, cov qog, thiab lwm yam khoom uas puas lawm yuav tsum tau kho lossis hloov tam sim ntawd;

7. Cov lus qhia ua haujlwm yuav tsum tau ua raws li, nrog rau lub log tes ua haujlwm ntawm lub zog ib txwm thiab ceev ceev;

8. Nias cov ntsia hlau kom sib npaug thiab sib npaug. Qhov chaw ntawm lub qhov thiab lub qia valve yuav tsum tau nthuav dav kom haum yog tias nws me dhau, lossis nws yuav tsum tau hloov yog tias nws loj dhau.

3. Qhov chaw sealing yog xau

vim li cas:

1. Qhov chaw sib khi tsis tuaj yeem tsim ib txoj kab ze thiab tsis tiaj tus;

2. Qhov chaw nruab nrab ntawm lub qia valve-rau-kaw cov tswv cuab tsis sib dhos, puas tsuaj, lossis dai;

3. Cov khoom kaw tau ntswj lossis tawm ntawm qhov chaw vim yog lub qia valve raug deformed lossis tsim tsis raug;

4. Lub valve tsis raug xaiv raws li cov xwm txheej ua haujlwm lossis qhov zoo ntawm cov khoom siv sealing tsis raug xaiv.

Txoj kev tswj xyuas

1. Xaiv cov gasket hom thiab cov khoom siv kom raug raws li qhov chaw ua haujlwm;

2. Kev teeb tsa zoo thiab kev ua haujlwm yooj yim;

3. Cov ntsia hlau yuav tsum tau nruj sib npaug thiab sib npaug. Yuav tsum siv lub wrench torque yog tias xav tau. Lub zog ua ntej nruj yuav tsum txaus thiab tsis siab dhau lossis qis dhau. Nruab nrab ntawm lub flange thiab qhov txuas threaded, yuav tsum muaj qhov sib txawv ua ntej nruj;

4. Lub zog yuav tsum sib npaug thiab lub gasket sib dhos yuav tsum nyob hauv nruab nrab. Nws txwv tsis pub siv ob lub gaskets thiab kom sib tshooj cov gaskets;

5. Qhov chaw kaw ruaj khov tau raug ua tiav lawm thiab xeb, puas tsuaj, thiab tsis zoo. Yuav kom ntseeg tau tias qhov chaw kaw ruaj khov ua tau raws li cov qauv tsim nyog, yuav tsum tau kho, sib tsoo, thiab kuaj xim;

6. Yuav tsum ceev faj txog kev huv thaum muab lub gasket tso rau hauv. Yuav tsum siv roj kerosene los ntxuav qhov chaw kaw, thiab lub gasket yuav tsum tsis txhob poob rau hauv av.