Ntxuav cov kauj ruam rau Valves

Cov khoom ntawm lub valve yuav tsum tau ua raws li 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 qhov saum npoo yuav tsum tsis txhob muaj machining burrs lossis lwm yam tsis xws luag;
2. Tag nrho cov khoom yog degreased;
3. Tom qab degreasing, ua cov kua qaub pickling thiab passivation, thiab cov tshuaj ntxuav tsis muaj phosphorus;
4. Tom qab cov kua qaub ntxuav thiab purification, yaug kom huv si nrog dej ntshiab, tsis muaj cov tshuaj seem. Cov kauj ruam no raug tshem tawm rau cov khoom siv carbon steel;
5. Qhuav txhua yam nrog ib daim ntaub uas tsis yog-woven, tsis muaj ib qho chaw ntawm cov hlau los yog cov plaub hau nyob rau saum npoo ntawm cov khoom, los yog tshuab ziab nrog cov roj nitrogen huv;
6. So txhua yam nrog cov ntaub ntawv tsis-woven los yog cov ntawv lim dej kom zoo dipped hauv cov cawv ntshiab kom txog thaum tsis muaj xim qias neeg.