Lub valve uas tiv taus xeb thiab muaj cov fluoroplastic ua los ntawm cov khoom siv fluoroplasticyog muab cov polytetrafluoroethylene resin (lossis cov ntaub ntawv ua tiav) rau ntawm phab ntsa sab hauv ntawm cov hlau lossis hlau npauj npaim valve siab-bearing qhov chaw lossis sab nraud ntawm cov khoom sab hauv ntawm npauj npaim valve los ntawm molding (lossis inlay) txoj kev. Cov khoom tshwj xeeb ntawm npauj npaim valve tiv thaiv cov xov xwm corrosive muaj zog yog ua rau ntau hom npauj npaim valves thiab cov hlab siab.
Hauv cov ntaub ntawv tiv thaiv xeb, PTFE muaj kev ua tau zoo heev uas tsis muaj qhov sib piv. Ntxiv rau cov hlau molten, cov tshuaj fluorine thiab cov hydrocarbons aromatic, nws tuaj yeem siv rau hauv ntau yam kev sib xyaw ntawm hydrochloric acid, sulfuric acid, nitric acid, aqua regia, organic acid, oxidant muaj zog, concentrated, alternating dilute acid, alternating alkali thiab ntau yam organic agents yog cov tshuaj tiv thaiv random. PTFE lining ntawm phab ntsa sab hauv ntawm lub valve npauj npaim tsis yog tsuas yog kov yeej qhov tsis zoo ntawm cov khoom PTFE tsis muaj zog, tab sis kuj daws qhov teeb meem ntawm kev tiv thaiv corrosion ntawm cov ntaub ntawv npauj npaim valve. Kev ua tau zoo tsis zoo thiab tus nqi siab. Tsis tas li ntawd, ntxiv rau nws cov tshuaj lom neeg ruaj khov zoo heev, PTFE muaj cov khoom tiv thaiv zoo thiab tiv thaiv kev nplaum, cov coefficients sib txhuam dynamic thiab static me me heev, thiab kev ua tau zoo tiv thaiv kev sib txhuam thiab kev ua kom lubrication. Nws yog siv ua khub sealing rau kev qhib thiab kaw ntawm lub valve npauj npaim, thiab nws yog qhov tsim nyog los txo qhov chaw sealing. Kev sib txhuam ntawm lub valve npauj npaim tuaj yeem txo qis, lub zog ua haujlwm ntawm lub valve npauj npaim tuaj yeem txo qis, thiab lub neej ua haujlwm ntawm cov khoom tuaj yeem txhim kho.
Lub valve uas muaj fluorine nyob rau hauv, tseem hu ua lub valve tiv thaiv xeb, feem ntau siv rau hauv cov xwm txheej ua haujlwm hnyav, cov tshuaj lom thiab cov tshuaj lom, lossis cov tshuaj lom neeg ntau hom acid-base lossis cov kuab tshuaj organic. Kev siv tsis raug yuav ua rau muaj kev poob nyiaj txiag loj thiab loj heev vim yog. Kev siv thiab kev saib xyuas kom raug ntawm lub valve npauj npaim tuaj yeem ua rau lub neej ua haujlwm ntev ntawm lub valve npauj npaim fluorine, yog li cov ntsiab lus twg tuaj yeem ua tau los tiv thaiv nws kom zoo?
1. Ua ntej siv, nyeem phau ntawv qhia kev siv ntawm lub qhov dej npauj npaim uas muaj fluorine ua tib zoo.
2. Siv nws nyob rau hauv qhov ntau ntawm qhov siab, qhov kub thiab nruab nrab uas tau teev tseg rau ntawm daim ntawv teev npe lossis hauv phau ntawv qhia.
3. Thaum siv, tiv thaiv lub qhov dej npauj npaim uas muaj fluorine los ntawm kev tsim kev ntxhov siab ntau dhau ntawm cov kav dej vim yog qhov kub thiab txias hloov pauv, txo qhov kub thiab txias hloov pauv, thiab ntxiv cov pob qij txha nthuav dav U-puab ua ntej thiab tom qab lub qhov dej npauj npaim.
4. Txwv tsis pub siv lub lever los qhib thiab kaw lub valve uas muaj fluorine. Ua tib zoo saib qhov qhib thiab kaw qhov chaw qhia thiab lub cuab yeej txwv ntawm lub valve uas muaj fluorine. Tom qab qhib thiab kaw lawm, tsis txhob yuam lub valve kom kaw, kom tsis txhob muaj kev puas tsuaj rau qhov chaw yas fluorine ua ntej.
5. Rau qee cov xov xwm uas tsis ruaj khov thiab yooj yim rau kev lwj (piv txwv li, qhov kev lwj ntawm qee cov xov xwm yuav ua rau qhov ntim nthuav dav thiab ua rau muaj kev nce siab tsis zoo hauv kev ua haujlwm), uas yuav ua rau lub qhov rooj npauj npaim puas tsuaj lossis xau, yuav tsum tau ua cov kev ntsuas kom tshem tawm lossis txwv cov yam uas ua rau kev lwj ntawm cov xov xwm tsis ruaj khov. . Thaum xaiv lub qhov rooj npauj npaim, lub qhov rooj npauj npaim uas muaj fluorine nrog lub cuab yeej txo qhov siab tsis siv neeg yuav tsum tau xaiv los xav txog qhov kev hloov pauv hauv kev ua haujlwm uas tshwm sim los ntawm qhov tsis ruaj khov thiab yooj yim lwj ntawm cov xov xwm.
6. Raulub valve uas muaj fluorine nyob rau hauvntawm cov kav dej uas muaj tshuaj lom, hluav taws kub, tawg thiab muaj zog corrosive, nws raug txwv tsis pub hloov cov ntim khoom hauv qab qhov siab. Txawm hais tias lub valve npauj npaim uas muaj fluorine muaj lub luag haujlwm kaw sab saud hauv kev tsim, nws tsis pom zoo kom hloov cov ntim khoom hauv qab qhov siab.
7. Rau cov kav dej uas muaj cov khoom siv hluav taws xob uas tsis tau npaj tseg, yuav tsum tau ntsuas kom ntseeg tau tias qhov kub thiab txias ntawm ib puag ncig thiab qhov kub thiab txias ntawm qhov chaw ua haujlwm tsis pub dhau qhov chaw hluav taws xob uas tsis tau npaj tseg ntawm cov khoom siv hluav taws xob kom tiv thaiv kev phom sij los ntawm lub hnub ci lossis hluav taws sab nraud.
Siv tau rau nruab nrab: ntau yam kev sib xyaw ntawm cov ntsev acid-base thiab qee cov organic solvents.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-08-2022
