Li-valve tsa serurubele sa tšepe le ductile tšepe li sebelisoa haholo bakeng sa taolo ea phallo liindastering tse fapaneng, empa li fapana ka thepa, ts'ebetso le ts'ebeliso. Ka tlase ke papiso e qaqileng ho u thusa ho utloisisa liphapang le ho khetha valve e lumellanang hantle le litlhoko tsa hau.
1. Sebopeho sa Lintho
1.1 Balofo ea Aron Butterfly:
- Grey cast iron, alloy ea tšepe e nang le khabone e ngata (2-4%).
- Ka lebaka la microstructure ea eona, carbon e teng ka mokhoa oa flake graphite. Sebopeho sena se etsa hore thepa e robehe haufi le mapheo a graphite ha a le tlas'a khatello, e leng se etsang hore e robehe le hore e se ke ea tenyetseha habonolo.
- E sebelisoa hangata lits'ebetsong tse nang le khatello e tlase le e seng ea bohlokoa.
1.2 Valofo ea DUctile Iron Butterfly:
- E entsoe ka tšepe ea ductile (eo hape e tsejoang e le nodular graphite cast iron or ductile iron), e na le palo e nyane ea magnesium kapa cerium, e tsamaisang graphite ka sebopeho sa spherical (nodular). Sebopeho sena se ntlafatsa haholo ductility le ho tiea ha thepa.
- E matla, e tenyetseha haholoanyane, 'me ha e ratehe ho robeha ho feta tšepe e entsoeng ka tšepe.
2. Thepa ea Mechini
2.1 Grey Cast iron:
- Matla: Matla a fokolang a tlaase (hangata 20,000–40,000 psi).
- Ductility: Brittle, e tloaetse ho khathala ka lebaka la khatello ea maikutlo kapa tšusumetso.
- Resistance: E tlase, e atisa ho robeha ka tlas'a meroalo ea tšohanyetso kapa ho tšoha ha mocheso.
- Ho hanyetsa Corrosion: Ho itekanetse, ho ipapisitse le tikoloho le ho koaheloa.
2.2 Aene ea Ductile:
- Matla: Spherical graphite e fokotsa lintlha tsa khatello ea maikutlo, e leng se etsang hore ho be le matla a holimo a matla (ka tloaelo 60,000-120,000 psi).
- Ductility: Ductile e eketsehileng, e lumellang deformation ntle le ho phunyeha.
- Khanyetso ea Liphello: E ntle haholo, e khona ho mamella ho thothomela le ho thothomela hamolemo.
- Resistance ea Corrosion: E ts'oana le tšepe e entsoeng ka tšepe, empa e ka ntlafatsoa ka liphahlo kapa masela.
3. Tshebetso le Durability
3.1 Li-valve tsa Aron Butterfly:
- E loketse lits'ebetso tsa khatello e tlase (mohlala, ho fihla ho 150–200 psi, ho latela moralo).
- Sebaka se phahameng sa ho qhibiliha (ho fihla ho 1150 ° C) le tsamaiso e ntle ea mocheso (e loketseng lisebelisoa tsa ho fokotsa matla a vibration, joalo ka li-braking systems).
- Ho hanana hantle le likhatello tse matla, ho li etsa hore li se ke tsa tšoaneleha bakeng sa maemo a phahameng a vibration kapa cyclic loading.
- Ka tloaelo e boima, e ka eketsang litšenyehelo tsa ho kenya.
3.2 Li-valve tsa DUctile Iron Butterfly:
- E khona ho sebetsana le likhatello tse phahameng (mohlala, ho fihla ho 300 psi kapa holimo, ho itšetlehile ka moralo).
- Ka lebaka la matla a eona a phahameng le ho feto-fetoha ha maemo, tšepe ea ductile ha e na monyetla oa hore e robehe tlas'a ho kobeha kapa ho ba le tšusumetso, ho e-na le hoo e holofala ka polasetiki, e lumellana le molao-motheo oa "moqapi o thata" oa saense ea thepa ea morao-rao. Sena se etsa hore e be e loketseng haholoanyane bakeng sa likopo tse batlang.
- E tšoarella haholoanyane libakeng tse nang le ho fetoha ha mocheso kapa khatello ea maikutlo.
4. Maemo a Kopo
4.1 Li-valve tsa Aron Butterfly:
- E sebelisoa hangata lits'ebetsong tsa HVAC.
- E sebelisoa mekhoeng e seng ea bohlokoa moo litšenyehelo li tlang pele. - E loketse maro a nang le khatello e tlase joalo ka metsi, moea, kapa likhase tse sa senyang (chloride ion <200 ppm).
4.2 Li-valve tsa DUctile Iron Butterfly:
- E loketse phepelo ea metsi le ho hloekisa metsi a litšila ka mecha ea litaba e sa nke lehlakore kapa e fokolang ea asiti / alkaline (pH 4-10).
- E loketse lits'ebetso tsa indasteri, ho kenyelletsa oli le khase, ts'ebetso ea lik'hemik'hale, le lits'ebetso tsa metsi a khatello e phahameng.
- E sebelisoa lits'ebetsong tse hlokang ho ts'epahala ho feta, joalo ka lits'ireletso tsa mollo kapa liphaephe tse nang le likhatello tse feto-fetohang.
- E loketse maro a mangata a senyang ha a sebelisoa ka lesela le loketseng (mohlala, EPDM, PTFE).
5. Litšenyehelo
5.1 Tshipi
Ka lebaka la ts'ebetso ea eona e bonolo ea tlhahiso le litšenyehelo tse tlase tsa thepa, hangata ha e theko e tlase. E loketse merero e nang le lichelete tse fokolang le litlhoko tse sa hlokeng letho. Le hoja tšepe e entsoeng ka tšepe e sa theko e tlaase, ho senyeha ha eona ho lebisa ho nkeng sebaka khafetsa le ho eketseha ha litšila.
5.2 Aene ea Ductile:
Ka lebaka la ts'ebetso ea alloying le ts'ebetso e phahameng, litšenyehelo li phahame. Bakeng sa lits'ebetso tse hlokang ho tšoarella le matla, theko e phahameng e nepahetse. Tšepe ea ductile e na le botsoalle haholoanyane tikolohong ka lebaka la ho sebelisoa hape ho phahameng (> 95%).
6. Maemo le Litlhaloso
- Li-valve ka bobeli li lumellana le litekanyetso tse kang API 609, AWWA C504, kapa ISO 5752, empa li-valve tsa tšepe tsa ductile hangata li finyella litlhoko tse phahameng tsa indasteri bakeng sa khatello le nako e telele.
- Li-valve tsa tšepe tsa ductile li sebelisoa hangata lits'ebetsong tse hlokang ho tsamaellana le maemo a thata a indasteri.
7. Corrosion le Tlhokomelo
- Lisebelisoa ka bobeli li ka senyeha habonolo libakeng tse thata, empa matla a phahameng a tšepe ea ductile a etsa hore e sebetse hantle ha e kopantsoe le liphahlo tse sireletsang tse kang epoxy kapa nickel coatings.
- Li-valve tsa tšepe tsa cast li ka hloka ho lokisoa khafetsa libakeng tse senyang kapa tse nang le khatello e matla.
8. Tafole ea kakaretso
| Sebopeho | Lahlela Valofo ea Iron Butterfly | Valve ea ductile Iron Butterfly |
| Lintho tse bonahalang | Grey cast iron, brittle | Nodular tšepe, ductile |
| Matla a tšepe | 20,000–40,000 psi | 60,000–120,000 psi |
| Ductility | E tlase, e brittle | E phahameng, e tenyetseha |
| Khatello Rating | Tlase (150–200 psi) | Holimo (300 psi kapa ho feta) |
| Impact Resistance | Mafutsana | E kgabane |
| Lisebelisoa | HVAC, metsi, litsamaiso tse seng tsa bohlokoa | Oli / khase, lik'hemik'hale, tšireletso ea mollo |
| Litšenyehelo | Tlase | E phahameng |
| Khanyetso ea Corrosion | E leka-lekaneng (e nang le likoahelo) | E itekanetse (ho betere ka likoatipa) |
9. Joang ho Khetha?
- Khetha valve ea tšepe e entsoeng ka serurubele haeba:
- U hloka tharollo e bolokang chelete e ngata bakeng sa lits'ebetso tsa khatello e tlase, tseo e seng tsa bohlokoa joalo ka phepelo ea metsi kapa HVAC.
- Sistimi e sebetsa sebakeng se tsitsitseng se nang le khatello e fokolang kapa ho thothomela.
- Khetha valve ea ductile iron butterfly haeba:
- Sesebelisoa se kenyelletsa khatello e phahameng, meroalo e matla, kapa maro a senyang.
- Ho tšoarella, ho hanyetsa tšusumetso, le ho tšepahala ha nako e telele ke lintho tse tlang pele.
- Kopo e hloka lits'ebetso tsa indasteri kapa tsa bohlokoa joalo ka ts'ireletso ea mollo kapa ts'ebetso ea lik'hemik'hale.
10. Khothaletso ea VALVE ea ZFA
Joaloka moetsi ea nang le phihlelo ea lilemo tse ngata ho li-valve tsa serurubele, ZFA Valve e khothalletsa tšepe ea ductile. Ha e sebetse hantle feela, empa li-valve tsa ductile iron butterfly li boetse li bontša botsitso bo ikhethang le ho ikamahanya le maemo maemong a thata le a fetohang a ts'ebetso, ka katleho ho fokotsa litšenyehelo tsa tlhokomelo le litšenyehelo tsa ho nkela sebaka, e leng se etsang hore ho be le litšenyehelo tse phahameng ka nako e telele. Ka lebaka la ho fokotseha ha tlhokahalo ea tšepe e bohlooho, li-valve tsa serurubele sa tšepe li ntse li felisoa butle-butle. Ho ea ka pono ea thepa e tala, khaello e ntse e eketseha ea bohlokoa.