Temperature Range ntawm Brass Fittings
Brass yeeb nkab fittingsmuaj ntau yam rau qhov kub thiab txias. Ib tug raug tooj dag compression haum yog ntsuas rau dej kev pab cuam ntawm 0℃mus rau 95℃(32℃F txog 203℃F). Qhov ntau yam no suav nrog cov khoom siv dej kub hauv tsev, uas feem ntau tso tawm ntawm 60℃(140℃F). Qhov ntau yam ua rau lawv haum rau xyoo -ib puag ncig siv.
Kev ua tau zoo hauv Cov Dej Kub Kub
Cov khoom tuav nws lub zog txhua yam ntawm qhov kub thiab txias. A Class 125 tooj dag haum tuav cov kua siab txog li 200 psi thaum kub nyob qis dua 150℃F (65 degree). Qhov no deb tshaj qhov siab pom hauv cov kav dej hauv tsev (40-80 psi).Brass yeeb nkab fittingstsis txhob muag los yog deform nyob rau hauv ib txwm siv dej kub.
Kev ua haujlwm hauv Kev Siv Dej Txias
Kev pabcuam dej txias tsis yog qhov nyuaj rau tooj dag. Cov khoom tseem nyob twj ywm thiab tsis ua nkig zoo li qee cov yas. Txujtooj dag fittingsyog siv rau cov kab dej txias tseem ceeb nkag mus rau hauv tsev. Cov xwm txheej khov yuav tsum tau rwb thaiv tsev, tab sis tooj dag nws tus kheej ua tau zoo ntawm qhov kub thiab txias. Cov khoom raug ntsuas mus rau -20℃(-4℃F) rau qee qhov kev siv.
Qhov Kev Xav Tau DZR rau Dej Kub
Tsis yog txhua tus tooj dag tuav dej kub sib npaug. Txheem daj tooj dag (C36000) yog qhov yooj yim rau dezincification. Qhov no yog txheej txheem corrosion uas zinc leaches tawm ntawm cov hlau. Cov dej kub ua kom nrawm nrawm rau cov tshuaj tiv thaiv no. Lub xub ntiag ntawm chlorine hauv cov dej hauv nroog ua rau muaj kev puas tsuaj ntxiv.
Dezincification yog dab tsi?
Dezincification tawm tom qab lub cev tsis muaj zog, ntxeem tau tooj liab. Lub haum poob tag nrho cov neeg kho tshuab lub zog. Kev soj ntsuam kev soj ntsuam ntawm cov dej kub ua tsis tau tiav pom zinc "ua tiav leached ... tawm hauv cov ntxiab matrix los ntawm tag nrho cov phab ntsa tuab". Qhov tshwm sim yog tam sim ntawd, unpredictable to. Qhov no yog thawj hom tsis ua hauj lwm rautooj dag fittingshauv cov dej kub.
Txheeb xyuas DZR Brass
DZR sawv cev rau Dezincification Resistant Brass. Cov hlau no muaj me me ntawm arsenic lossis antimony. Cov additives no tiv thaiv kev xaiv tshem tawm ntawm zinc.Brass yeeb nkab fittingsua los ntawm DZR yog qhov yuav tsum tau ua rau cov dej kub hauv ntau cov lej. Saib rau "DZR" lossis "CR" cov cim ntawm qhov haum. Lub SharkBite expansion tee yog ib qho piv txwv ntawm DZR haum tau ntawv pov thawj rau hydronic cua sov.
Lead-Cov Kev Xav Tau Dawb rau Cov Dej Haus
Cov kav dej haus yuav tsum muaj cov khoom siv lead ua tsawg tsawg. Tus qauv NSF/ANSI 372 txhais tau hais tias "lead-dawb" tsawg dua 0.25% cov ntsiab lus txhuas. Txhua yam niaj hnubtooj dag fittingsrau cov dej haus yuav tsum tau raws li tus qauv no. Qhov no siv rau ob qho tib si dej kub thiab dej txias. Daim ntawv pov thawj yog cim rau ntawm cov khoom lossis ntim khoom.
Dej Chemistry thiab Fitting Life
Txawm tias DZR tooj dag raug cuam tshuam los ntawm cov dej tsis zoo. Tsawg pH (acidic dej) accelerates dezincification. Cov ntsiab lus chloride siab kuj yog ib qho tseem ceeb. Stagnant los yog qis-flow tej yam kev mob ua phem rau kev tawm tsam. Cov dej tawv nrog nplai deposits ntxiab corrosive tawm tsam hlau nto. Kev tshawb nrhiav forensic pom zoo kom kuaj dej kom tiv thaiv tsis tau ntxov ntxov.
Piv txwv ntawm kev ua tsis tiav hauv Cov Dej Kub Kub
Cov ntaub ntawv tshawb fawb tau tshuaj xyuas cov khoom siv tooj dag hauv tsev cov kab dej kub. Cov fittings pom hnyav "plug-type" dezincification. Zinc tau leached tag nrho los ntawm tag nrho cov phab ntsa thickness. Kev tshawb nrhiav pom tias qhov corrosion yog vim cov dej kub kub ua ke nrog cov dej ntxhia chemistry. Tag nrho cov fittings zoo sib xws nyob rau hauv cov kab dej kub tau muaj kev pheej hmoo ntawm kev xau.
Kev ntsuas ntsuas thoob qhov ntsuas kub
Lub peev xwm siab txo qis thaum kub nce. Chav Kawm 125 haum rau 200 psi ntawm chav tsev kub yuav tsum tau derated rau cov dej kub. Ntawm 150℃F (65 degree), kev nyab xeeb siab poob qis heev. Nco ntsoov sab laj cov chaw tsim khoom tshwj xeeb rau kev ntsuas tseeb.Brass yeeb nkab fittingssiv nyob rau hauv siab -kub systems xav tau ib tug kev nyab xeeb margin.
Daim ntawv thov hauv Cov Cuab Yeej Cuab Yeej
Brass fittings yog tsim rau hydronic cua sov tshuab. Cov tshuab no siv dej kub los ntawm cov tshuab hluav taws xob lossis cov voj hauv pem teb. Qhov siab tshaj plaws ua haujlwm kub rau cua sov feem ntau yog 160℃F (71 degree) ntawm 75 psi. DZR tooj dag yog pom zoo tshwj xeeb rau cov kaw - voj tshuab. Cov ntawv pov thawj suav nrog NSF / ANSI 61 rau kev siv dej sib xws.
Cov ntsiab lus thiab cov kev coj ua zoo tshaj plaws
Yog lawm,tooj dag fittingsyog haum rau ob qho tib si dej kub thiab dej txias. Txawm li cas los xij, koj yuav tsum xaiv DZR tooj dag rau cov tshuab dej kub. Txheem daj tooj dag yuav ua tsis tau ntxov ntxov los ntawm dezincification. Ib txwm siv cov hmoov lead -dawb fittings rau cov dej haus. Ntsuam xyuas koj cov dej chemistry yog tias koj xav tias muaj mob hnyav.
| Feature | Txheem tooj dag | DZR Brass |
|---|---|---|
| Cov dej kub haum | Poor (dezincification txaus ntshai) | Zoo heev |
| Dej txias haum | Zoo | Zoo |
| Lead- Muaj pub dawb | Yog lawm | Yog lawm |
| Daim ntawv thov zoo tshaj plaws | Dej txias nkaus xwb, kua dej | Dej kub, cua sov, potable |
Brass yeeb nkab fittingsmuab kev pabcuam txhim khu kev qha thoob plaws qhov kub thiab txias ntawm thaj chaw thiab cov kav dej ua lag luam. Cov khoom siv lub zog thiab durability yog pov thawj. Tus yuam sij rau kev ua neej ntev yog xaiv cov khoom raug. Xaiv DZR, lead- tooj dag dawb rau txhua daim ntawv thov dej kub. Koj qhov system yuav ua haujlwm nyab xeeb rau ntau xyoo.
