Cov khoom ntawm cov ntu tseem ceeb ntawm lub valve yuav tsum tau xav txog lub zog lub cev (ntsuas kub (ntsuas hluav taws xob (corrosivity) ntawm kev ua haujlwm nruab nrab. Nyob rau tib lub sijhawm, nws kuj tseem yuav tsum paub qhov kev nyiam huv ntawm qhov nruab nrab (seb puas muaj cov khoom siv). Ib qho ntxiv, cov kev cai muaj feem xyuam thiab cov chaw siv neeg siv yuav tsum raug xa mus rau.
Ntau yam cov ntaub ntawv tuaj yeem ua tau raws li cov kev pabcuam uas xav tau ntawm cov li qub nyob rau hauv ntau yam kev ua haujlwm. Txawm li cas los xij, qhov kev pabcuam kev lag luam ntau tshaj plaws lub neej thiab kev ua tau zoo tshaj plaws ntawm lub valve tuaj yeem tau los ntawm kev xaiv tau thiab tsim nyog xaiv ntawm cov khoom siv valve.
Cov Khoom Siv Ntawm Valve
1. Grey cam khwb cia hlau li qub yog siv nyob rau hauv ntau thaj teb ntawm kev lag luam vim tias lawv tus nqi qis thiab dav ntawm kev thov. Lawv feem ntau yog siv nyob rau hauv rooj plaub ntawm dej, chav, roj thiab roj thiab nkev, textile thiab ntau lwm yam khoom muaj me me lossis tsis muaj kev cuam tshuam rau hlau paug.
Nws yog siv rau cov khoom siv qis nrog kev ua haujlwm kub ntawm - 15 ~ 200 ℃ thiab ib qho kev siab siab ntawm PN ≤ 1.6MPA.
daim duab
2. Dub Tub Ntxhais Txuj Ci Malleable rau nruab nrab thiab tsis tshua muaj siab li siab nrog kev ua haujlwm ntawm - 15 ~ 300 ≤ 2.5MPA.
Siv tau xov xwm yog dej, dej hiav txwv, roj, ammonia, thiab lwm yam.
3. Nodular cas hlau nodular cam khwb cia hlau yog ib hom hlau cam khwb cia, uas yog ib hom hlau cam khwb cia. Tus nplaim taws graphite nyob rau hauv grey cam khwb cia hlau yog hloov los ntawm nodular graphite lossis cov graphite graphite. Cov kev hloov ntawm cov qauv sab hauv cov hlau ua nws cov khoom siv neeg zoo dua li cov xim grey txawv teb chaws xim ntsuab, thiab tsis ua rau lwm cov khoom. Yog li ntawd, cov li qub ua los ntawm cov hlau coo muaj cov kev pab cuam dua li cov ua los ntawm cov hlau grey. Nws yog siv rau nruab nrab thiab cov nyiaj tsis tshua muaj siab nrog kev ua haujlwm kub ntawm - 30 ~ 350 ℃ thiab ib qho kev siab siab ntawm PN ≤ 4.0MPA.
Siv tau nruab nrab yog dej, dej hiav txwv, chav dej, huab cua, roj, roj, thiab lwm yam.
4. Carbon Steel (WCA, WCB, WCB, WCB, WCB) pib tsim cov kev xav tau ntawm cov neeg muaj peev xwm ntawm cov cuab yeej hlau li qub thiab tooj liab li qub. Txawm li cas los xij, vim cov kev pabcuam zoo ntawm cov kev ua haujlwm ntawm cov roj carbon hlau thiab lawv cov kev cuam tshuam los ntawm kev siv hluav taws xob, feem ntau suav nrog cov kev ua haujlwm ntawm cov khoom siv hlau li qub thiab tooj liab.
Nws yog siv rau nruab nrab thiab kev kub siab li qub nrog kev ua haujlwm kub ntawm - 29 ~ 425 ℃. Qhov kub ntawm 16mn thiab 30mn nyob nruab nrab ntawm - 40,000 ntau pua, uas feem ntau siv los hloov ASTM A105. Siv tau nruab nrab yog cov chav khov thiab cov pa hluav taws xob superheated. Cov khoom roj siab thiab cov roj kub tsawg, roj liquefied, huab cua compressed, dej, ntuj, thiab lwm yam.
5. Cov hlau siv hluav taws xob tsawg dua (LCB) cov hlau tsis tshua muaj pa roj thiab cov hlau tsis muaj roj hauv qab no xoom, tab sis tsis tuaj yeem txuas ntxiv rau thaj chaw cryogenic. Valves made of these materials are suitable for the following media, such as seawater, carbon dioxide, acetylene, propylene and ethylene.
Nws yog siv tau rau cov roj tsawg nrog kev ua haujlwm ntawm - 46 ~ 345 ℃.
6. Cov li qub ua los ntawm cov hlau tsis muaj roj (WC9, WC9) thiab cov roj av khib nyiab (xws li cov roj khov kho thiab cov roj kub, roj av thiab huab cua. Cov kev ua haujlwm kub ntawm carbon start valve yuav 500 ℃, thiab ntawm tsawg alloy steel valve yuav yog qhov siab dua 600. Ntawm qhov kub thiab txias, cov khoom siv me me ntawm cov hlau tsis muaj roj ntau dua li cov hlau roj carbon.
Kev kub siab thiab kev kub siab tau txais txiaj ntsig rau cov tsis sib haum xeeb nrog kev ua haujlwm ntawm - 29 ~ 595 ℃; C5 thiab C12 yog siv rau cov ntsuas kub siab thiab cov khoom siv siab siab rau cov xov xwm corrosive nrog kev ua haujlwm ntawm - 29 thiab 650 ℃.
7. Austenitic Stainless hlau Ausenitic Stainless hlau muaj txog 18% chromium thiab 8% npib tsib xee. 18-8 Austenitic Stainless hlau feem ntau siv los ua lub cev valve thiab cov khoom siv liab qab uas nyob hauv qab thiab kub muaj zog. Ntxiv Molybdenum mus rau 18-8 Stainless hlau Matrix thiab me ntsis nce cov ntsiab lus tseem ceeb yuav ua rau muaj kev tiv thaiv corrosion. Cov li qub tau ua los ntawm cov hlau no tuaj yeem siv tau dav hauv kev lag luam yeeb yaj kiab, cov kua txiv, carbonic acid, tanning kua thiab ntau lwm yam khoom siv tshuaj lom.
Txhawm rau thov kom muaj qhov kub thiab txias thiab txuas ntxiv rau cov khoom muaj pes tsawg leeg, Niobium ntxiv rau cov hlau stainless, uas yog lub npe hu ua 18-10-nb. Qhov kub yuav yog 800 ℃.
Anustenitic Stainless hlau feem ntau yog siv nyob rau ntawm tsawg heev kub thiab yuav tsis tau dhau los ntawm cov khoom siv no (xws li 18-10-3 mooco) yog qhov haum rau kev ua haujlwm ntawm tsis kub. Piv txwv li, nws thauj cov roj, xws li nkev, biogas, oxygen thiab nitrogen.
Nws yog siv tau rau cov li qub nrog kev ua kom haum nrog kev ua haujlwm ntawm - 196 ~ 600 ℃. Anustenitic Stainless hlau kuj yog qhov zoo tagnrho cov khoom kub tsawg dua valve.
daim duab
8. Plastics thiab Ceramics yog cov ntaub ntawv tsis yog xim hlau. Qhov loj tshaj plaws tshwj xeeb ntawm cov khoom siv tsis yog xim hlau yog lawv cov khoom siv muaj zog, thiab txawm tias muaj cov txiaj ntsig zoo uas cov khoom siv hlau tsis muaj. Nws yog feem ntau muaj rau corrosive kev tshaj xov xwm nrog Nominal siab PN ≤ 1.6MPA thiab ua haujlwm kub thiab tsis muaj feem xyuam rau kev ua dej haus. Cov khoom ntawm cov ntu tseem ceeb ntawm lub valve yuav tsum tau xav txog lub zog lub cev (ntsuas kub (ntsuas hluav taws xob (corrosivity) ntawm kev ua haujlwm nruab nrab. Nyob rau tib lub sijhawm, nws kuj tseem yuav tsum paub qhov kev nyiam huv ntawm qhov nruab nrab (seb puas muaj cov khoom siv). Ib qho ntxiv, cov kev cai muaj feem xyuam thiab cov chaw siv neeg siv yuav tsum raug xa mus rau.
Ntau yam cov ntaub ntawv tuaj yeem ua tau raws li cov kev pabcuam uas xav tau ntawm cov li qub nyob rau hauv ntau yam kev ua haujlwm. Txawm li cas los xij, qhov kev pabcuam kev lag luam ntau tshaj plaws lub neej thiab kev ua tau zoo tshaj plaws ntawm lub valve tuaj yeem tau los ntawm kev xaiv tau thiab tsim nyog xaiv ntawm cov khoom siv valve.
Lub sijhawm Post: Feb-28-2023