1. Cov li qub yuav tsum tau muab cia rau hauv qhov chaw qhuav, zoo - qhov cua nyob sab hauv tsev, nrog rau ob qhov kawg ntawm txoj kab thaiv.
2. Valves khaws cia rau lub sij hawm ntev yuav tsum tau tshuaj xyuas tsis tu ncua, ntxuav cov av, thiab coated nrog cov roj los tiv thaiv - xeb ntawm cov khoom siv.
3. Tom qab kev teeb tsa, cov valve yuav tsum tau kuaj xyuas tsis tu ncua, tsom rau cov hauv qab no:
(1) Hnav rau ntawm qhov chaw sealing.
(2) Hnav ntawm cov xov trapezoidal ntawm lub qia valve thiab valve qia txiv ntoo.
(3) Txawm tias cov khoom ntim tau dhau los lossis tsis ua haujlwm; yog tias puas lawm, nws yuav tsum tau hloov tam sim ntawd.
(4) Tom qab kho lub valve thiab sib dhos, yuav tsum tau ua qhov kev ntsuas kev sib khi.
Rau cov valve hauv kev ua haujlwm, tag nrho cov khoom siv valve yuav tsum ua kom tiav thiab zoo. Bolts ntawm flanges thiab kev txhawb nqa yog qhov tseem ceeb, thiab cov xov yuav tsum zoo thiab tsis txhob xoob. Yog hais tias lub handwheel fastening txiv ntseej yog pom tias yog xoob, nws yuav tsum tau nruj tam sim ntawd kom tsis txhob hnav ntawm kev sib txuas los yog poob ntawm handwheel thiab nameplate. Yog hais tias ib tug handwheel ploj lawm, nws yuav tsum tsis txhob muab hloov nrog ib tug adjustable ciaj ntswj; kev hloov pauv yuav tsum tau ua kom sai. Lub caj pas ntim khoom yuav tsum tsis txhob skewed los yog tsis muaj pre- zawm clearance. Rau li qub nyob rau hauv ib puag ncig muaj kev kis kab mob los ntawm nag, daus, plua plav, xuab zeb, thiab lwm yam pa phem, cov npog tiv thaiv yuav tsum tau nruab rau ntawm lub valve stems. Valve cov cim yuav tsum ua kom tiav, raug, thiab pom meej meej. Cov ntsaws ruaj ruaj, lub kaus mom, thiab cov khoom siv pneumatic yuav tsum tsis muaj zog thiab ua haujlwm zoo. Cov tsho rwb thaiv tsev yuav tsum tsis muaj dents thiab tawg. Nws yog txwv tsis pub tawm tsam, sawv ntsug, lossis txhawb nqa cov khoom hnyav ntawm qhov ua haujlwm li qub; Qhov no tshwj xeeb yog txwv tsis pub rau cov uas tsis yog{10}}hlau thiab cam khwb cia hlau li qub.
