Valve ntxuav cov kauj ruam

Lub valve qhov chaw yuav tsum dhau los ntawm cov txheej txheem hauv qab no ua ntej sib dhos:
1. Raws li qhov yuav tsum tau ua, qee qhov yuav tsum tau polished, thiab yuav tsum tsis txhob ua cov burrs ntawm qhov chaw;
2. Txhua qhov chaw yog degreased;
3. Tom qab degreasing tiav, pickle thiab passivate. Cov tshuaj ntxuav tsis muaj phosphorus;
4. Tom qab pickling thiab purification, yaug nrog dej ntshiab. Yuav tsum tsis muaj tshuaj lom neeg. Cov kauj ruam no raug tshem tawm rau cov pa roj carbon steel;
5. So cov khoom ib los ntawm ib qho nrog cov ntaub tsis-woven. Tsis muaj lint lossis lwm cov plaub hau yuav tsum nyob twj ywm ntawm qhov chaw, lossis tshuab ziab nrog cov nitrogen huv;
6. Siv cov ntaub ntawv uas tsis yog-woven los yog cov ntawv lim cov ntawv dipped nyob rau hauv analytical ntshiab cawv los so txhua feem kom txog thaum tsis muaj av.