Cov ntaub ntawv sealing feem ntau siv rau cov li qub yog dab tsi?

Muaj ntau hom li qub, tab sis lub luag haujlwm tseem ceeb yog tib yam, uas yog, txuas lossis txiav cov dej ntws nruab nrab. Yog li ntawd, qhov teeb meem sealing ntawm lub li qub yog qhov tseem ceeb heev.

Yuav kom ntseeg tau tias lub valve tuaj yeem txiav cov dej ntws nruab nrab zoo yam tsis muaj qhov xau, nws yog qhov tsim nyog los xyuas kom meej tias lub foob valve tseem zoo. Muaj ntau yam ua rau lub valve xau, suav nrog kev tsim qauv tsis tsim nyog, qhov chaw sib cuag sealing tsis zoo, cov khoom sib txuas xoob, qhov sib haum xoob ntawm lub cev valve thiab lub hau, thiab lwm yam. Tag nrho cov teeb meem no yuav ua rau lub valve sealing tsis zoo. Zoo, yog li tsim teeb meem xau. Yog li ntawd, cov txheej txheem kaw lub valve yog ib qho txheej txheem tseem ceeb ntsig txog kev ua haujlwm thiab qhov zoo ntawm lub valve, thiab xav tau kev tshawb fawb txog kev ua haujlwm thiab kev tshawb fawb tob.

Cov ntaub ntawv siv rau kev sib khi rau cov li qub feem ntau suav nrog cov hom hauv qab no:

1. NBR

Tsis kam roj zoo heev, tsis kam hnav zoo, tsis kam kub, thiab nplaum tau zoo. Qhov tsis zoo yog tsis kam kub qis, tsis kam ozone, tsis muaj zog hluav taws xob, thiab tsis yooj ywm me ntsis.

2. EPDM

Qhov tseem ceeb tshaj plaws ntawm EPDM yog nws qhov ua tau zoo heev rau oxidation, ozone tsis kam thiab corrosion tsis kam. Vim tias EPDM yog polyolefin tsev neeg, nws muaj cov yam ntxwv zoo heev rau vulcanization.

3. PTFE

PTFE muaj zog tshuaj lom neeg tsis kam, tiv taus feem ntau cov roj thiab cov kuab tshuaj (tshwj tsis yog ketones thiab esters), tiv taus huab cua zoo thiab tiv taus ozone, tab sis tsis tiv taus txias.

4. Hlau cam khwb cia

Lus Cim: Cov hlau cam khwb cia yog siv rau dej, roj thiab roj xov xwm nrog qhov kub ntawm≤100°C thiab lub zog nominal ntawm≤1.6mpa.

5. Cov hlau nickel

Lus Cim: Cov hlau nickel siv rau cov kav dej uas muaj qhov kub ntawm -70 ~ 150°C thiab lub zog engineering PN≤20.5mpa.

6. Tooj liab hlau

Cov hlau tooj liab muaj kev tiv thaiv zoo thiab tsim nyog rau cov kav dej thiab cov kav dej uas muaj qhov kub thiab txias≤200℃thiab nominal siab PN≤1.6mpa.