Kev taw qhia txog cov khoom siv pob valve

Cov ntaub ntawv ntawm lub pob valve muaj ntau yam kom haum rau ntau yam kev ua haujlwm thiab cov kev xav tau ntawm cov xov xwm. Cov ntaub ntawv ntawm lub pob valve feem ntau thiab lawv cov yam ntxwv yog raws li nram no:

1. Cov khoom siv hlau cam khwb cia

Hlau grey: haum rau dej, pa dej, cua, roj, roj thiab lwm yam xov xwm nrog lub siab nominal PN ≤ 1.0MPa thiab kub -10 ℃ ~ 200 ℃. Cov hom lag luam feem ntau yog HT200, HT250, HT300, HT350.

Hlau nplaum uas yooj ywm: tsim nyog rau dej, pa dej, cua thiab roj nruab nrab nrog lub siab nominal PN ≤ 2.5MPa thiab kub -30 ℃ ~ 300 ℃. Cov hom lag luam feem ntau yog KTH300-06, KTH330-08, KTH350-10.

Hlau zas: Haum rau PN≤4.0MPa, kub -30 ℃ ~ 350 ℃ dej, pa dej, cua thiab roj thiab lwm yam xov xwm. Cov qib siv feem ntau yog QT400-15, QT450-10, QT500-7. Tsis tas li ntawd, hlau zas uas tsis muaj kua qaub (acid) siab-silicon yog haum rau cov xov xwm corrosive nrog lub siab nominal PN≤0.25MPa thiab kub qis dua 120 ℃.

2. Cov hlau tsis xeb

Lub pob valve stainless hlau feem ntau siv rau hauv cov kav dej nruab nrab thiab siab, nrog kev tiv taus kub ntau dua, thiab siv dav hauv tshuaj lom neeg, petrochemical, smelting thiab lwm yam lag luam. Cov khoom siv stainless hlau muaj kev tiv taus corrosion zoo thiab lub zog kub siab, tsim rau ntau yam corrosive media thiab qhov kub siab ib puag ncig.

3. Cov khoom siv tooj liab

Tooj liab hlau: Haum rau PN≤2.5MPa dej, dej hiav txwv, oxygen, cua, roj thiab lwm yam xov xwm, nrog rau qhov kub ntawm -40 ℃ ~ 250 ℃ chav nruab nrab. Cov qib siv feem ntau yog ZGnSn10Zn2 (tin bronze), H62, Hpb59-1 (tooj dag), QAZ19-2, QA19-4 (aluminium bronze) thiab lwm yam.

Tooj liab kub siab: tsim nyog rau cov khoom siv ua pa thiab roj av nrog lub siab nominal PN ≤ 17.0MPa thiab kub ≤ 570 ℃. Cov hom lag luam feem ntau yog ZGCr5Mo, 1Cr5Mo, ZG20CrMoV thiab lwm yam.

4. Cov khoom siv hlau carbon

Cov hlau carbon yog tsim rau dej, pa dej, cua, hydrogen, ammonia, nitrogen thiab cov khoom siv roj av nrog lub siab nominal PN ≤ 32.0MPa thiab kub -30 ℃ ~ 425 ℃. Cov qib siv feem ntau yog WC1, WCB, ZG25 thiab cov hlau zoo 20, 25, 30 thiab cov hlau tsis tshua muaj hlau 16Mn.

5. Khoom siv yas

Lub pob yas valve yog ua los ntawm cov yas rau cov khoom siv raw, uas yog tsim rau kev cuam tshuam ntawm cov txheej txheem conveying nrog cov xov xwm corrosive. Cov yas ua tau zoo xws li PPS thiab PEEK feem ntau yog siv ua lub rooj zaum pob valve kom ntseeg tau tias lub kaw lus tsis xeb los ntawm cov tshuaj lom neeg uas muaj nyob rau lub sijhawm.

6. Cov khoom siv ua los ntawm cov av nplaum

Lub pob valve ceramic yog ib hom khoom siv valve tshiab, nrog kev tiv thaiv corrosion zoo heev thiab hnav tsis kam. Lub plhaub valve tuab tshaj qhov yuav tsum tau ua ntawm tus qauv hauv tebchaws, thiab cov tshuaj lom neeg thiab cov khoom siv kho tshuab ntawm cov khoom tseem ceeb ua tau raws li qhov yuav tsum tau ua ntawm tus qauv hauv tebchaws. Tam sim no, nws yog siv rau hauv kev tsim hluav taws xob thermal, hlau, roj av, ua ntawv, kev tsim kho tsiaj txhu thiab lwm yam lag luam.

7. Cov ntaub ntawv tshwj xeeb

Cov hlau kub qis: tsim nyog rau qhov siab nominal PN ≤ 6.4MPa, qhov kub ≥ -196 ℃ ethylene, propylene, kua roj av, kua nitrogen thiab lwm yam xov xwm. Cov hom lag luam feem ntau siv yog ZG1Cr18Ni9, 0Cr18Ni9, 1Cr18Ni9Ti, ZG0Cr18Ni9 thiab lwm yam.

Cov hlau tsis xeb uas tiv taus kua qaub: tsim nyog rau nitric acid, acetic acid thiab lwm yam xov xwm nrog lub siab nominal PN ≤ 6.4MPa thiab kub ≤ 200 ℃. Cov hom lag luam feem ntau yog ZG0Cr18Ni9Ti, ZG0Cr18Ni10 (tiv taus kua qaub nitric), ZG0Cr18Ni12Mo2Ti, ZG1Cr18Ni12Mo2Ti (tiv taus kua qaub thiab urea) thiab lwm yam.

Hauv kev xaus, kev xaiv cov khoom siv ntawm lub pob valve yuav tsum tau txiav txim siab raws li cov xwm txheej ua haujlwm tshwj xeeb thiab cov kev xav tau nruab nrab kom ntseeg tau tias kev ua haujlwm ib txwm thiab kev ruaj khov mus sij hawm ntev ntawm lub valve.