Li-valve tsa bolo ea PVC (PolyVinyl Chloride) li sebelisoa haholo ke li-valve tsa polasetiki tse koalang. Belofo e na le bolo e feto-fetohang e nang le bore. Ka ho potoloha bolo ka kotara, bore e inline kapa perpendicular ho piping mme phallo ea buloa kapa ea thibeloa. Li-valve tsa PVC li tšoarella nako e telele ebile li theko e boima. Ho feta moo, li ka sebelisoa bakeng sa mecha ea litaba e fapaneng, ho kenyelletsa metsi, moea, lik'hemik'hale tse senyang, li-acids le metheo. Ha li bapisoa le li-valve tsa bolo ea koporo kapa tse sa hloekang, li lekantsoe bakeng sa mocheso o tlase le likhatello 'me li na le matla a tlase a mochine. Li fumaneha ka likhokahano tse fapaneng tsa liphaephe, joalo ka li-sockets tsa solvent (glue connection) kapa likhoele tsa liphaephe. Double union, kapa li-valve tsa 'nete tsa union, li na le lipheletso tse arohaneng tsa liphaephe tse khomaretsoeng 'meleng oa li-valve ka khokahanyo ea khoele. Valve e ka tlosoa habonolo bakeng sa ho nkela sebaka, ho hlahlojoa le ho hloekisa.
Tlhahiso ea PolyVinyl Chloride
PVC e emetse PolyVinyl Chloride 'me ke polymer ea maiketsetso ea boraro e sebelisoang ka ho fetisisa ka mor'a PE le PP. E hlahisoa ke karabelo ea 57% ea khase ea chlorine le 43% ea khase ea ethylene. Khase ea chlorine e tsoa ka electrolysis ea metsi a leoatle, 'me khase ea ethylene e fumanoa ka ho tšeloa ha oli e tala. Ha ho bapisoa le lipolasetiki tse ling, tlhahiso ea PVC e hloka oli e tala e fokolang haholo (PE le PP li hloka hoo e ka bang 97% ea khase ea ethylene). Chlorine le ethylene lia arabela ebe li etsa ethanedichlorine. Sena se sebetsoa ho hlahisa Vinylchlorine monomer. Sesebelisoa sena se entsoe ka polymerized ho theha PVC. Qetellong, li-additives tse ling li sebelisetsoa ho fetola thepa e kang ho thatafala le elasticity. Ka lebaka la mokhoa o batlang o le bonolo oa tlhahiso le ho fumaneha ho hoholo ha lihlahisoa tse tala, PVC ke thepa e theko e tlaase le e tsitsitseng e tsitsitseng ha e bapisoa le lipolasetiki tse ling. PVC e na le khanyetso e matla khahlanong le khanya ea letsatsi, lik'hemik'hale le oxidation e tsoang metsing.
Lintho tsa PVC
Lethathamo le ka tlase le fana ka kakaretso ea likarolo tsa bohlokoa tsa thepa:
- Bophelo bo bobebe, bo matla le bo bolelele ba tšebeletso
- E loketse ho sebelisoa hape le tšusumetso e batlang e le tlase tikolohong ha e bapisoa le lipolasetiki tse ling
- Hangata e sebelisoa bakeng sa lits'ebetso tsa bohloeki, joalo ka metsi a nooang. PVC ke thepa ea bohlokoa e sebelisoang ho boloka kapa ho fetisetsa lihlahisoa tsa lijo.
- E hanyetsana le lik'hemik'hale tse ngata, li-acids le metheo
- Boholo ba li-valve tsa bolo ea PVC ho fihlela ho DN50 li na le tekanyo e phahameng ea khatello ea PN16 (16 bar mocheso oa kamore).
PVC e na le boemo bo tlase ba ho nolofatsa le ho qhibiliha. Ka hona, ha e khothalletsoe ho sebelisa PVC bakeng sa mocheso o ka holimo ho likhato tse 60 tsa Celsius (140°F).
Lisebelisoa
Li-valve tsa PVC li sebelisoa ka matla tsamaisong ea metsi le ho nosetsa. PVC e boetse e loketse mecha ea litaba e senyang, joalo ka metsi a leoatle. Ho feta moo, thepa e hanyetsana le li-acids le metheo e mengata, litharollo tsa letsoai le li-solvents tsa organic. Lits'ebetsong tseo ho tsona ho sebelisoang lik'hemik'hale le li-acid tse senyang, hangata PVC e khethoa ka holim'a tšepe e sa hloekang. PVC e boetse e na le mathata a itseng. Phello ea bohlokoa ka ho fetisisa ke hore PVC e tloaelehileng e ke ke ea sebelisoa bakeng sa mocheso oa mecha ea litaba ka holimo ho 60 ° C (140 ° F). PVC ha e hanyetsane le li-hydrocarbon tse nkhang hamonate le tse chlorine. PVC e na le matla a tlase a mochine ho feta koporo kapa tšepe e sa hloekang, kahoo li-valve tsa PVC hangata li na le tekanyo e tlaase ea khatello (PN16 e tloaelehile bakeng sa li-valve ho fihlela ho DN50). Lethathamo la limmaraka tse tloaelehileng moo li-valve tsa PVC li sebelisoang:
- Ho nosetsa ka malapeng / litsebi
- Phekolo ea metsi
- Litšobotsi tsa metsi le liliba
- Aquariums
- Lithōle
- Matamo a ho sesa
- Ts'ebetso ea lik'hemik'hale
- Ho lokisa lijo
Nako ea poso: May-30-2020