Valves raug cais los ntawm nominal loj / siab / kub / khoom / txuas / tuav

Li qub yog cais los ntawm nominal loj / siab / kub / khoom / kev sib txuas / tuav Cov tshuaj corrosion ntawm hlau nyob ntawm qhov kub thiab txias, mechanical load ntawm kev sib txhuam, kev ruaj ntseg ntawm sulfides muaj nyob rau hauv lubricating cov ntaub ntawv thiab lawv cov acid kuj, lub sij hawm ntawm kev sib cuag nrog lub nruab nrab thiab cov nyhuv catalytic ntawm cov hlau ntawm cov txheej txheem nitriding, kev hloov pauv ntawm cov molecules ntawm corroding tshuaj rau hlau, thiab lwm yam. 1, valve corrosion, feem ntau yog to taub raws li lub valve hlau cov ntaub ntawv nyob rau hauv cov tshuaj los yog electrochemical ib puag ncig los ntawm kev puas tsuaj. Txij li thaum corrosion tshwm sim nyob rau hauv kev sib cuam tshuam ntawm cov hlau thiab ib puag ncig ib puag ncig, yuav ua li cas cais cov hlau los ntawm ib puag ncig ib puag ncig lossis siv cov khoom siv hluavtaws ntau dua los ua ib qho kev txhawj xeeb. 2. Nws paub zoo tias kev puas tsuaj hlau hlau muaj kev cuam tshuam loj heev rau lub neej, kev ntseeg siab thiab kev pabcuam lub neej ntawm li qub. Qhov kev txiav txim ntawm cov neeg kho tshuab thiab corrosive cov neeg ua haujlwm ntawm cov hlau ua rau nce tag nrho cov nyiaj hnav ntawm qhov chaw sib cuag. Lub valve thaum lub sijhawm ua haujlwm, kev sib txhuam ntawm qhov chaw ntawm tag nrho cov nyiaj hnav. Thaum lub sijhawm ua haujlwm ntawm lub valve, kev sib txhuam ntawm qhov chaw raug hnav thiab puas vim yog kev ua haujlwm ib txhij thiab cov tshuaj lom neeg lossis electrochemical cuam tshuam ntawm cov hlau thiab ib puag ncig. Rau lub valve, nws cov kav dej ua haujlwm huab cua yog qhov nyuaj; Lub xub ntiag ntawm hydrogen sulfide, carbon dioxide thiab qee cov organic acids hauv cov roj, cov pa roj carbon monoxide thiab dej reservoir ua rau lub zog puas tsuaj ntawm cov hlau nto, yog li poob nws lub peev xwm ua haujlwm sai. 3, vim cov tshuaj corrosion ntawm hlau nyob ntawm qhov kub thiab txias, mechanical load ntawm kev sib txhuam qhov chaw, lubricating cov ntaub ntawv uas muaj sulfide thiab nws cov acid kuj stability thiab nruab nrab kev sib cuag ntev thiab hlau nyob rau hauv lub nitriding txheej txheem ntawm catalytic kev txiav txim, corrosion ntawm molecules ntawm cov khoom. ntawm cov hlau conversion ceev thiab lwm yam. Yog li ntawd, txoj kev anticorrosion ntawm hlau valve (los yog ntsuas) thiab daim ntawv thov ntawm cov khoom siv hluavtaws valve tau dhau los ua ib qho ntawm cov ntsiab lus ntawm kev tshawb fawb kev lag luam valve. 4, hlau valve anticorrosion, tuaj yeem nkag siab zoo li cov hlau valve coated los tiv thaiv cov xwm txheej ntawm cov txheej txheem tiv thaiv corrosion (xws li xim, xim, cov khoom siv lubricating, thiab lwm yam), kom lub valve txawm nyob rau hauv kev tsim khoom, khaws cia, kev thauj mus los. los yog nyob rau hauv tag nrho cov txheej txheem ntawm nws siv yog tsis corroded. 5, hlau valve anticorrosion txoj kev nyob ntawm qhov yuav tsum tau muaj kev tiv thaiv lub sij hawm, kev thauj mus los thiab preservation tej yam kev mob, valve qauv cov yam ntxwv thiab cov ntaub ntawv, ntawm chav kawm, xav txog cov economic nyhuv ntawm tshem tawm anticorrosion. Kev faib tawm ntawm cov li qub raws li nominal txoj kab uas hla / siab / kub / khoom / kev sib txuas hom / kev ua haujlwm hom Kev faib cov li qub raws li nominal txoj kab uas hla 1, "me me txoj kab uas hla valve" nominal txoj kab uas hla DN≤40mm 2, "nruab nrab txoj kab uas hla valve" nominal txoj kab uas hla DN50-300mm 3, "loj txoj kab uas hla" Nominal txoj kab uas hla DN350-1200mm valve 4, "loj txoj kab uas hla valve" nominal txoj kab uas hla DN≥1400mm valve Valves raug cais raws li nominal loj li qub 1, "me me caliber valve" nominal txoj kab uas hla DN≤40mm valve 2, "medium caliber valve" nominal txoj kab uas hla DN50-300mm valve 3, "loj caliber valve" nominal txoj kab uas hla DN350-1200mm valve 4, "loj txoj kab uas hla valve" nominal txoj kab uas hla DN≥1400mm valve Classification ntawm nominal siab li qub 1, "lub tshuab nqus tsev valve" ua hauj lwm siab tshaj li tus qauv atmospheric siab valve 2, "tsis tshua muaj siab valve" nominal siab PN≤ 1.6mpa valve 3, "qhov nruab nrab siab valve" nominal siab PN2.5-6.4mpa valve 4, "siab siab valve" nominal siab PN10.0-80.0mpa valve 5, "super siab siab valve" nominal siab PN≥100MPA valve Raws li qhov nruab nrab kev khiav hauj lwm kub valve cais 1, "siab kub valve" T> 450 ℃ valve 2, "qhov nruab nrab kub valve" 120 ℃ ≤ T ≤ 450 ℃ valve 3, "zoo li qub valve" -40 ℃ ≤ T ≤ 120 ℃ valve 4, "tsis tshua muaj kub valve" -100 ℃ ≤ T ≤-40 ℃ valve 5, "* * kub valve" T