Valve lub cev khoom Compatibility
Yuav ua li cas xaiv cov khoom siv zoo rau li qub
Muaj ntau yam yuav tsum tau xav txog thaum xaiv cov khoom siv rau koj li qub. Ua ntej, koj yuav tsum xav txog yam xov xwm uas lawv yuav ua. Cov khoom siv yuav tsum muaj peev xwm tiv taus cov xov xwm ib txwm muaj nyob hauv kab nrog rau cov xov xwm uas tuaj yeem nkag mus rau hauv kab lossis ib puag ncig sab nraud ntawm lub valve.
Tom qab ntawd koj kuj yuav tsum xav txog:
* cov kev cai tshwj xeeb ntawm koj daim ntawv thov
* cov txheej txheem txheej txheem
* thiab compatibility xav tau
Kev xaiv cov khoom yog qhov tseem ceeb rau kev ua haujlwm ntev, kev ntseeg siab, thiab kev nyab xeeb.
Kev xaiv cov khoom siv rau lub cev valve thiab cov ntsaws ruaj ruaj (diaphragm, O-rings) yog txiav txim siab los ntawm hom kua lossis roj, qhov concentration, siab thiab kub. Ntau yam xwm txheej tuaj yeem cuam tshuam rau cov khoom xaiv. Kev txiav txim siab zoo yuav tsum tau muab rau qhov ntsuas kub, siab thiab tshuaj lom neeg ua ntej xaiv cov khoom kawg.
Valve lub cev khoom Compatibility
Cov khoom siv lub cev feem ntau rau lub cev valve yog tooj dag, stainless hlau thiab nylon. Brass yog cov khoom siv nrov tshaj plaws rau solenoid li qub. Nws muaj zog heev thiab tiv taus ntau yam tshuaj, tab sis piv txwv li tsis tsim nyog rau dej hiav txwv lossis dej distilled. Stainless hlau yog pom zoo rau corrosive media, xws li seawater. Ntxiv mus, nws yog hnav-resistant, uas ua rau nws heev haum rau intensive kev siv. Nylon yog qhov pheej yig tshaj qhov sib txawv, muaj cov khoom siv zoo thiab tsim nyog rau ntau yam xov xwm.
Tshuaj
Valve cov ntaub ntawv compatibility nrog tshuaj muaj peev xwm sib txawv nyob ntawm seb cov tshuaj tshwj xeeb koom nrog. Qee cov ntaub ntawv yuav corrode, piv txwv li xeb. Cov khoom siv twg tsim nyog nyob ntawm seb nws tiv taus corrosion los ntawm cov kua los yog roj yuav tsum tau ua. Txawm li cas los xij, qee cov ntaub ntawv feem ntau siv vim lawv cov tshuaj tiv thaiv kab mob.
Peb muab ntau yam khoom siv valve rau kev siv tshuaj lom neeg. Nov yog qee qhov ntawm lawv thiab lawv cov tshuaj lom neeg sib raug zoo:
stainless hlau (EN 1.4408 thiab 1.4409): Stainless hlau yog dav siv vim nws zoo heev corrosion kuj zog. Nws yog sib xws nrog ntau yam tshuaj, nrog rau cov kua qaub (xws li sulfuric acid, hydrochloric acid), alkalis, organic solvents, thiab ntau cov kua corrosive.
titanium yog ib yam khoom uas muaj peev xwm tiv taus chlorides, uas muaj nyob rau hauv xws li dej ntsev thiab tshuaj. Thaum titanium yog qhov kev xaiv kim dua, nws lub teeb yuag tuaj yeem txo tus nqi ntawm kev thauj mus los, kev ua haujlwm thiab kev saib xyuas.
Hlau alloys xws li acid-resistant hlau (EN 1.4409, EN 1.4408) muaj ntau heev, tab sis kom muaj kev tiv thaiv corrosion ntau dua, ob lub tsev, super duplex,,904l ua SMO qib xws li 254 tej zaum yuav txaus ntawm qis concentration ntawm chlorides xws li dej hiav txwv ntawm qhov kub thiab txias. Cov pa roj carbon steel thiab cam khwb cia hlau corrode sai heev nyob rau hauv ib puag ncig kev lag luam, tsis zoo li cov khoom kim heev acid-resistant steels.
Hastelloy: Hastelloy alloys (xws li Hastelloy C276) muaj kev tiv thaiv tshwj xeeb rau ntau yam tshuaj corrosive, suav nrog cov kua qaub muaj zog, alkalis, oxidizing cov neeg ua haujlwm, thiab qhov chaw hnyav. Lawv feem ntau yog siv rau hauv kev thov tshuaj ua cov ntawv thov.
Gas
Valve cov ntaub ntawv compatibility nrog gases nyob ntawm seb cov roj tshwj xeeb raug tuav. Piv txwv li Helium yog ib qho roj uas nyuaj heev rau kev cais tawm. Hydrogen atoms raug yuam mus rau hauv cov khoom thiab puas lub valve los ntawm sab hauv, txheej txheem hu ua Hydrogene embritelment. Helium yog li xav tau cov khoom siv hauv lub valve rau cov ntsaws ruaj ruaj.
Cov pa paug ntawm cov pa phem lossis cov pa roj uas muaj kev nyab xeeb rau huab cua yog ib qho teeb meem hauv txhua qhov kev lag luam. Los ntawm kev siv cov li qub ua tau raws li cov qauv kev tawm tsam tawm tsam raws li ISO 15848-1 thiab VDI 2440 (TA-luft), qhov teeb meem tuaj yeem zam lossis txwv.
Nov yog qee cov ntaub ntawv uas peb siv hauv peb li qub thiab lawv cov kev sib raug zoo nrog cov pa roj:
stainless hlau (EN 1.4408 thiab 1.4409): Stainless hlau li qub yog feem ntau sib xws nrog ntau yam roj av, suav nrog cov roj inert, hydrocarbons, thiab cov roj uas tsis muaj corrosive. Stainless hlau muaj kev tiv thaiv zoo rau corrosion thiab tuaj yeem tiv taus kev kub siab thiab kub kub siv roj. Tsis tas li ntawd, Stainless hlau yog cov resistant rau hydrogen embrittlement, ua rau nws muaj kev nyab xeeb thiab txhim khu kev qha xaiv rau hydrogen gas siv.
Kab mob: Hastelloy alloys, xws li Hastelloy C276, yog cov resistant rau corrosive gases, nrog rau acidic los yog alkaline gases. Lawv feem ntau yog siv rau hauv kev thov kev siv roj ua haujlwm uas yuav tsum muaj kev tiv thaiv corrosion siab.
Duplex thiab Super Duplex: Duplex thiab super duplex cov ntaub ntawv (xws li, SAF 2205, SAF 2507) muab superior corrosion kuj nyob rau hauv ib puag ncig aggression, ua rau lawv haum rau tuav corrosive gases. Cov ntaub ntawv no muaj kev tiv thaiv zoo heev rau pitting, crevice corrosion, thiab kev nyuaj siab corrosion cracking. Duplex thiab super duplex li qub feem ntau yog siv nyob rau hauv ntug dej hiav txwv, tshuaj, thiab siv roj thiab roj, qhov twg gases nrog cov ntsiab lus chloride siab lossis acidic gases tau ntsib.
904L: Cov. 904L yog cov hlau alloy austenitic stainless hlau uas paub txog nws cov kev tiv thaiv zoo rau ntau yam kev tawm tsam, suav nrog sulfuric acid, phosphoric acid, thiab lwm yam kua qaub gases. Nws muaj lub zog zoo thiab tawv, ua rau nws haum rau kev lag luam roj, tshuaj lom neeg, thiab cov ntaub ntawv ntaub ntawv thiab cov ntawv siv uas muaj corrosive gases.
254 TSI: TS EN 254SMO (EN 1.4547), super-austenitic stainless hlau, nthuav tawm tshwj xeeb tsis kam rau ntau yam corrosive gases, xws li sulfuric acid, hydrochloric acid, thiab acetic acid. Nws yog qhov zoo heev rau pitting, crevice corrosion, thiab kev nyuaj siab corrosion cracking, txawm nyob rau hauv ib puag ncig hnyav. 254SMO li qub feem ntau yog siv rau hauv tshuaj lom neeg, cov ntaub so ntswg thiab ntawv, thiab kev siv sab nrauv.
Titanium *: Titanium tiv taus ntau yam corrosive gases, nrog rau cov chlorine ntub dej, hydrochloric acid, thiab ntau cov organic tebchaw. Nws muaj qhov tshwj xeeb tsis kam rau pitting thiab crevice corrosion thiab tswj nws txoj kev ncaj ncees ntawm qhov kub siab. Titanium li qub pom cov ntawv thov hauv kev lag luam tshuaj, cov nroj tsuag petrochemical, thiab lwm qhov chaw uas yuav tsum muaj kev tiv thaiv corrosion heev.
* Muaj ntau qib sib txawv ntawm titanium. Cov qib xa mus rau cov alloys sib txawv lossis cov khoom sib xyaw ntawm titanium thiab raug xaiv los ntawm cov lej lossis cov lej lej, txhua tus sawv cev rau qee qhov tshwj xeeb thiab cov khoom siv. Qib 5 yog feem ntau siv rau li qub, tab sis kuj yog qib 2 siv. Qhov kev xaiv ntawm qib nyob ntawm seb qhov yuav tsum tau ua ntawm daim ntawv thov.
Cov hlau siv hauv valve & FITTINGS
ALUMINIUM - Cov hlau tsis-ferrous, hnyav heev, kwv yees li ib feem peb ntau npaum li cov hlau. Aluminium exhibits zoo heev atmospheric corrosion kuj, tab sis yuav ua tau heev reactive nrog lwm yam hlau. Nyob rau hauv li qub, txhuas feem ntau yog siv los ua cov khoom siv sab nrauv xws li lub log tsheb lossis cov cim cim.
COPPER - Ntawm cov khoom tseem ceeb ntawm wrot coppermaterials yog lawv cov thermal thiab hluav taws xob conductivity, corrosion resistance, hnav tsis kam, thiab ductility. Wrot tooj liab ua tau zoo nyob rau hauv daim ntawv thov kub thiab yog yooj yim koom los ntawm soldering los yog brazing. Wrot tooj liab tsuas yog siv rau fittings.
BRONZE - Ib qho ntawm thawj cov alloys tsim nyob rau hauv lub hnub nyoog bronze yog dav lees paub raws li kev lag luam tus qauv rau siab-rated bronze li qub thiab fittings. Bronze muaj lub zog ntau dua li tooj liab, yooj yim cam khwb cia, tau txhim kho machinability, thiab yog yooj yim heev los ntawm soldering los yog brazing. Bronze yog heev resistant rau pittingcorrosion, nrog rau feem ntau tsis kam mus rau feem ntau cov tshuaj tsawg tshaj li cov ntshiab tooj liab.
SILICONE BRONZE - Muaj cov ductility ntawm tooj liab tab sis muaj zog ntau dua. Kev tiv thaiv corrosion ntawm silicon bronze yog sib npaug rau orgreater dua li ntawm tooj liab. Feem ntau siv los ua cov khoom siv hauv siab-ntsuas li qub, silicon bronze muaj zog tiv thaiv corrosion ntau dua li cov tooj dag.
ALUMINIUM BRONZE - Cov khoom siv dav dav tshaj plaws siv hauv npauj npaim li qub, aluminium bronze yog cov cua sov kho tau thiab muaj lub zog ntawm cov hlau. Tsim ib qho txhuas oxide txheej ib qho chaw ua rau cov hlau no tiv taus corrosion heev. Tsis pom zoo rau siab pH ntub dej systems.BRASS - Feem ntau zoo corrosion kuj. Susceptible tode-zincification hauv cov ntawv thov tshwj xeeb; zoo heev machinability.Primary siv rau wrot tooj dag yog rau pob valve stems thiab pob, andiron valve stems. A forging qib ntawm tooj dag yog siv nyob rau hauv pob valvebodies thiab kawg pieces.
GREY IRON - Ib qho hlau, carbon thiab silicon; yooj yim cam khwb cia; zoo siab nruj nyob rau hauv lub as-cast condition. Grey hlau muaj zoo dampening zog thiab yog yooj yim machined. Nws yog cov khoom siv rau lub cev thiab lub kaus mom ntawm Chav Kawm 125 thiab 250 hlau lub cev li qub. Grey hlau muaj kev tiv thaiv corrosion uas zoo dua li cov hlau hauv qee qhov chaw.
DUCTILE IRON - Nws muaj cov ntsiab lus zoo ib yam li grey hlau. Kev kho tshwj xeeb hloov cov qauv metallurgical, uas yields superior mechanical zog; qee cov qib yog kho cua sov kom txhim kho qhov zoo. Cov hlau muaj zog ntawm cov hlau siv cov txheej txheem zoo sib xws rau cov hlau grey. CARBON STEEL - Cov khoom siv zoo heev; zoo tiv thaiv kev nyuaj siab corrosion thiab sulfides. Cov pa roj carbon steel muaj qhov kub thiab txias tsis muaj zog, yog qhov tawv heev thiab muaj zog zoo heev. Feem ntau siv nyob rau hauv lub rooj vag, lub ntiaj teb, thiab kos li qub rau daim ntawv thov txog li 850 ° F, thiab hauv ib-, ob-, thiab peb-daim pob li qub
3% NICKEL hlau - Txhim kho corrosion kuj tshaj grey thiab ductile hlau. Siab kub corrosion kuj thiab mechanical zog. Heev resistant rau oxidizing cua.
NICKEL-PLated DUCTILE Iron - Nickel coatings tau txais kev lees paub dav siv rau hauv kev ua tshuaj. Cov coatings muaj lub zog tensile siab heev, 50 txog 225 ksi. Ntawm qhov tod tes, qhov hardness ntawm cov khoom yog qhov qhia txog nws qhov kev tiv thaiv toabrasion thiab hnav cov yam ntxwv. Nickel plating yog dav teev raws li ib tug disc txheej rau npauj npaim li qub.
400 SERIES STAINLESS STEEL -Ib qho hlau, carbon, thiab chromium. Cov stainless no feem ntau sib nqus vim nws cov qauv martensitic thiab cov ntsiab lus hlau. 400 series stainless hlau yog resistant rau kub oxidation thiab tau txhim kho lub cev thiab txhua yam khoom dua carbon hlau. Feem ntau 400 series stainlesssteels yog kub-kho. Cov kev siv ntau tshaj plaws nyob rau hauv li qub yog rau cov khoom siv hauv npauj npaim li qub thiab lub rooj zaum nraub qaum thiab cov npoo hauv cov cam khwb cia steel li qub.
316 Stainless hlau -Ib qho hlau, carbon, npib tsib xee, thiab chromium. Lub nonmagnetic stainless hlau nrog ductility ntau dua 400SS. Austinetic nyob rau hauv cov qauv, 316 stainless hlau muaj zoo heev corrosion kuj mus rau ib tug ntau yam ntawm ib puag ncig, tsis raug rau kev nyuaj siab corrosion cracking thiab tsis cuam tshuam los ntawm tshav kub kho. Feem ntau siv nyob rau hauv li qub yog qia, lub cev thiab ballmaterials.
17-4 PH STAINLESS STEEL® - Yog martensitic nag lossis daus / hnub nyoog hardening stainless hlau, muab siab zog thiab hardness.17-4 PH tiv thaiv corrosive nres zoo dua li ib qho ntawm 400series stainless hlau, thiab nyob rau hauv feem ntau nws cov corrosion kuj ze ze li ntawm 300 series stainless hlau. 17-4PH feem ntau yog siv los ua cov khoom siv rau npauj npaim thiab pob li qub.
ALLOY 20Cb-3® - Cov hlau no muaj ntau dua cov npib tsib xee thiab chromium ntau dua 300 series stainless hlau thiab nrog rau qhov sib ntxiv ntawm columbium, cov hlau no tiv thaiv kev ntxhov siab corrosion tawg thiab txhim kho kev tiv thaiv sulfuric acid. Alloy 20 pom kev siv dav hauv txhua theem ntawm kev ua tshuaj lom neeg. Feem ntau siv los ua sab hauv trimon npauj npaim li qub.
MONEL® - yog ib qho nickel-tooj liab alloy siv feem ntau ua interiortrim ntawm npauj npaim thiab pob li qub. Ib qho ntawm cov ntaub ntawv tshwj xeeb tshaj plaws rau kev tiv thaiv corrosion rau hiav txwv thiab dej ntsev. Monel kuj tseem tiv taus cov tshuaj muaj zog caustic.
STELLITE® - Cobalt puag alloy, yog ib qho zoo tshaj plaws tag nrho cov hom phiaj hardfacing alloys. Heev tiv taus tshav kub, abrasion, corrosion, cuam tshuam, galling, oxidation, thermal shock thiab yaig. Stellite siv lub highpolish thiab yog siv nyob rau hauv steel valve rooj rings.Nquag siv nrog hloov ntshav plasma-arc; Stellite hardness tsis cuam tshuam los ntawm kev kho cua sov.
HASTELLOY C® - Lub siab nickel-chromium molybdenum alloy, uas muaj qhov ua tau zoo rau ntau qhov chaw ua haujlwm tshuaj, suav nrog cov muaj zog oxidizers xws li wetchlorine, chlorine gas, thiab ferric chloride. Hastelloy C tseem tiv taus nitric, hydrochloric, thiab sulfuric acids ntawm qhov kub nruab nrab.