Kev txheeb xyuas Cov Khoom Siv Tseem Ceeb Rau Kev Taw Qhia Hloov Valve

Hauv kev tsim thiab kev siv ntawm phau ntawv hloov li qub, kev xaiv cov khoom siv yog qhov tseem ceeb uas txiav txim siab lawv cov kev tiv thaiv corrosion, lub zog, sealing kev ua tau zoo, thiab kev pabcuam lub neej. Tau ntsib txoj kev ua haujlwm nyuaj xws li kub siab, kub siab, thiab muaj zog corrosion, kev xaiv tsim nyog ntawm cov khoom sib txawv ncaj qha cuam tshuam rau kev ntseeg siab ntawm lub valve thiab kev nyab xeeb ntawm lub cev.

 

Cov pa roj carbon steel yog qhov tseem ceeb tshaj plaws - cov khoom siv lub hom phiaj, sawv cev los ntawm Q235 thiab WCB. Nws muab lub zog zoo thiab ua haujlwm tau zoo, yog pheej yig, thiab dav siv nyob rau hauv qis - siab, ib txwm- kub daim ntawv thov rau cov uas tsis yog - corrosive media xws li dej, chav, thiab roj. Txawm li cas los xij, nws qhov kev tiv thaiv corrosion yog txwv, yuav tsum tau coatings nto los yog hauv ob sab phlu rau kev tiv thaiv, thiab nws tsis haum rau acidic los yog alkaline ib puag ncig.

 

Stainless hlau, vim cov zaj duab xis passivation imparted los ntawm nws cov chromium -nickel alloy, tau dhau los ua qhov kev xaiv zoo tshaj plaws hauv corrosion-cov ntaub ntawv resistant. 304 (06Cr19Ni10) yog resistant rau cov acids thiab alkalis, haum rau pipelines hauv zaub mov, tshuaj, thiab lub teeb tshuaj industries; 316 (06Cr17Ni12Mo2), nrog rau qhov sib ntxiv ntawm molybdenum, txhim kho nws cov kev tiv thaiv rau chloride ion corrosion, ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau dej hiav txwv, brine, thiab sulfur - muaj cov xov xwm; 317L thiab duplex steel (2205/2507) ntxiv dag zog rau pitting thiab kev nyuaj siab corrosion, muaj peev xwm tuav tau siab -concentration acid daws thiab siab -kub chloride ib puag ncig.

 

Cam khwb cia hlau yog tsim los ntawm grey cam khwb cia hlau (HT200) thiab ductile hlau (QT450). Lub qub qub muaj tus nqi qis thiab zoo castability, thiab feem ntau yog siv nyob rau hauv qis - siab, ib txwm - qhov kub thiab txias systems xws li dej thiab kua, thiab HVAC; tom kawg, los ntawm kev kho spheroidizing, txhim kho toughness thiab lub zog, tuaj yeem tiv taus siab dua, thiab maj mam hloov grey cam khwb cia hlau hauv cov kav dej.

 

Tooj liab thiab tooj liab alloys ( tooj dag H62, bronze ZCuSn10Pb1) muaj thermal conductivity zoo heev, tsis yog -magnetic, thiab yooj yim rau txheej txheem. Lawv feem ntau yog siv rau hauv cov twj siv hluav taws xob, lub tshuab tub yees, thiab lwm yam kev siv uas yuav tsum tau ua kom huv si thiab tiv thaiv - cov khoom sib nqus. Txawm li cas los xij, lawv cov kev tiv thaiv corrosion tsis muaj zog dua li cov hlau tsis muaj steel, thiab lawv yuav tsum tau zam hauv cov xov xwm oxidizing muaj zog.

 

Cov alloys tshwj xeeb yog tsim los rau kev ua haujlwm huab cua: Hastelloy (C276, B2) tiv taus corrosion muaj zog (xws li hydrochloric acid thiab sulfuric acid) thiab siv rau hauv cov tshuaj reactors; titanium alloys muaj tsawg ntom thiab zoo heev corrosion kuj, ua rau lawv haum rau aerospace thiab seawater desalination; Monel alloys tiv thaiv hydrofluoric acid corrosion thiab yog thawj qhov kev xaiv rau fluoride ntsev media. Tsis tas li ntawd, engineering plastics (PVC, PP, PVDF), nrog rau lawv lub teeb yuag thiab corrosion-cov khoom tiv taus, yog siv dav hauv cov kav dej uas tsis muaj zog heev.

 

Kev xaiv cov khoom yuav tsum muaj kev txiav txim siab ntawm cov yam ntxwv ntawm kev tshaj tawm, qhov kub thiab txias, siab, thiab tus nqi. Tsuas yog cov ntaub ntawv sib phim rau cov kev ua haujlwm ua haujlwm tuaj yeem ua rau qhov ua tau zoo ntawm cov khoom siv tes ua haujlwm thiab tsim kom muaj kev tiv thaiv ruaj khov rau kev tswj cov kua dej.