Introduction of valve sealing materials—TWS Valve

Valve sealing khoom yog ib feem tseem ceeb ntawm valve sealing. Dab tsi yog cov khoom siv valve sealing? Peb paub tias valve sealing nplhaib cov ntaub ntawv muab faib ua ob pawg: hlau thiab tsis-hlau. Cov hauv qab no yog cov lus qhia luv luv rau kev siv ntawm ntau yam khoom sib khi, nrog rau cov hom valve feem ntau siv.

1. Synthetic roj hmab

Cov khoom zoo ntawm cov roj hmab hluavtaws xws li roj tsis kam, kub tsis kam thiab corrosion kuj zoo dua li cov roj hmab ntuj. Feem ntau, kev siv kub ntawm cov roj hmab hluavtaws yog t≤150 ℃, thiab qhov kub ntawm cov roj hmab ntuj yog t≤60 ℃.Rubber yog siv los kaw lub ntiaj teb li qub,roj hmab zaum rooj vag valvediaphragm li qub,rubber zaum npauj npaim valve, rubber zaum viav vias kos valve (check li qub), pinch li qub thiab lwm yam li qub nrog nominal siab PN≤1MPa.

2. Nylon

Nylon muaj cov yam ntxwv ntawm kev sib txhuam me me thiab zoo corrosion kuj. Nylon feem ntau yog siv rau pob li qub thiab lub ntiaj teb li qub nrog kub t≤90 ℃ thiab nominal siab PN≤32MPa.

3. PTFE

PTFE feem ntau yog siv rau lub ntiaj teb li qub,rooj vag li qub, pob li qub, thiab lwm yam nrog kub t≤232 ℃ thiab nominal siab PN≤6.4MPa.

4. Cam khwb cia hlau

Cam khwb cia hlau yog siv raurooj vag valve, ntiaj teb valve, ntsaws valve, thiab lwm yam rau kub t≤100 ℃, nominal siab PN≤1.6MPa, roj thiab roj.

5. Babbitt alloy

Babbitt alloy yog siv rau ammonia ntiaj teb valve nrog kub t-70 ~ 150 ℃ thiab nominal siab PN≤2.5MPa.

6. tooj liab alloy

Cov khoom siv rau tooj liab yog 6-6-3 tin bronze thiab 58-2-2 manganese tooj dag. Copper alloy muaj qhov hnav tsis zoo thiab haum rau dej thiab chav nrog kub t≤200 ℃ thiab nominal siab PN≤1.6MPa. Nws yog feem ntau siv nyob rau hauvrooj vag li qub, ntiaj teb li qub,check li qub, ntsaws valve, thiab lwm yam.

7. Chrome stainless hlau

Cov qib siv feem ntau ntawm chromium stainless hlau yog 2Cr13 thiab 3Cr13, uas tau raug quenched thiab tempered, thiab muaj corrosion kuj zoo. Nws yog feem ntau siv hauv li qub rau kev tshaj tawm xws li dej, chav dej thiab roj av nrog qhov kub thiab txias t≤450 ℃ thiab nominal siab PN≤32MPa.

8. Chromium-nickel-titanium stainless hlau

Cov qib siv feem ntau ntawm chromium-nickel-titanium stainless hlau yog 1Cr18Ni9ti, uas muaj kev tiv thaiv corrosion zoo, yaig tsis kam thiab kub tsis kam. Nws yog tsim rau chav, nitric acid thiab lwm yam xov xwm nrog kub t≤600 ℃ thiab nominal siab PN≤6.4MPa, siv rau lub ntiaj teb valve, pob valve, thiab lwm yam.

9. Nitrided hlau

Cov qib siv feem ntau ntawm cov hlau nitrided yog 38CrMoAlA, uas muaj corrosion kuj zoo thiab khawb tsis kam tom qab kho carburizing. Feem ntau siv nyob rau hauv lub hwj chim chaw nres tsheb qhov rooj valve nrog kub t≤540 ℃ thiab nominal siab PN≤10MPa.

10. Boronizing

Boronizing ncaj qha txheej txheem sealing nto los ntawm cov khoom ntawm lub valve lub cev los yog disc lub cev, thiab tom qab ntawd nqa tawm boronizing nto kev kho mob, lub sealing nto muaj zoo hnav tsis kam. Siv nyob rau hauv lub hwj chim chaw nres tsheb blowdown valve.