Le hoja ka linako tse ling li-valve tsa polasetiki li nkoa e le sehlahisoa se khethehileng-khetho e ka sehloohong ea ba etsang kapa ba qapa lihlahisoa tsa liphaephe tsa polasetiki bakeng sa lisebelisoa tsa indasteri kapa ba tlamehang ho ba le lisebelisoa tse hloekileng haholo-ho nka hore li-valve tsena ha li na tšebeliso e ngata e akaretsang ke nako e khutšoanyane. mahlonoko. Ha e le hantle, li-valve tsa polasetiki kajeno li na le mefuta e mengata ea tšebeliso ha mefuta e ntseng e eketseha ea thepa le baqapi ba molemo ba hlokang lisebelisoa tseo ba bolela litsela tse ngata tsa ho sebelisa lisebelisoa tsena tse ngata.
LITŠOANTŠISO PLASTIKI
Melemo ea li-valve tsa thermoplastic li na le bophara-ho senya, lik'hemik'hale le ho hanyetsa ho senya; mabota a ka hare a boreleli; boima bo bobebe; boiketlo ba ho kenya; tebello ea bophelo bo bolelele; le litšenyehelo tse tlase tsa potoloho ea bophelo. Melemo ena e lebisitse ho amoheleheng ho pharaletseng ha li-valve tsa polasetiki lits'ebetsong tsa khoebo le tsa indasteri tse kang ho ajoa ha metsi, phekolo ea metsi a litšila, ts'ebetso ea tšepe le lik'hemik'hale, lijo le meriana, limela tsa motlakase, lihlahisoa tsa oli le tse ling.
Li-valve tsa polasetiki li ka etsoa ka lisebelisoa tse ngata tse fapaneng tse sebelisoang mekhoeng e mengata. Li-valve tsa thermoplastic tse tloaelehileng haholo li entsoe ka polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), le polyvinylidene fluoride (PVDF). Li-valve tsa PVC le CPVC li atisa ho kopanngoa le tsamaiso ea liphaephe ka lipheletsong tsa sokete tsa sokete, kapa lipheletsong tse nang le khoele le tse nang le flanged; athe, PP le PVDF li hloka ho kopanngoa ha likarolo tsa tsamaiso ea liphaephe, ebang ke ka mocheso-, butt- kapa electro-fusion technologies.
Li-valve tsa Thermoplastic li sebetsa hantle libakeng tse senyang, empa li na le thuso joalo ka litšebeletso tse akaretsang tsa metsi hobane ha li na lead1, ha li khone ho chesoa 'me li ke ke tsa rusa. Sistimi le li-valve tsa PVC le CPVC li lokela ho lekoa le ho netefatsoa ho NSF [National Sanitation Foundation] standard 61 bakeng sa litlamorao tsa bophelo bo botle, ho kenyeletsoa tlhokahalo e tlase ea lead bakeng sa Annex G. Ho khetha thepa e nepahetseng bakeng sa maro a senyang ho ka sebetsanoa ka ho shebana le khanyetso ea lik'hemik'hale ea moetsi. tataisa le ho utloisisa phello eo mocheso o tla ba le eona holim'a matla a thepa ea polasetiki.
Le hoja polypropylene e na le halofo ea matla a PVC le CPVC, e na le lik'hemik'hale tse ngata tse hanyetsanang le lik'hemik'hale hobane ha ho na li-solvents tse tsejoang. PP e sebetsa hantle ka har'a acetic acid le hydroxides, hape e loketse litharollo tse bobebe tsa li-acids tse ngata, alkalis, matsoai le lik'hemik'hale tse ngata tsa tlhaho.
PP e fumaneha e le thepa e mebala-bala kapa e se nang 'mala (ea tlhaho). Natural PP e senyehile haholo ke mahlaseli a ultraviolet (UV), empa metsoako e nang le "carbon black pigmentation" e fetang 2.5% e tsitsitse ka mokhoa o lekaneng oa UV.
Kaha thermoplastics e na le bothata ba mocheso, tekanyo ea khatello ea valve e fokotseha ha mocheso o ntse o phahama. Lisebelisoa tse fapaneng tsa polasetiki li na le deration e lumellanang le mocheso o eketsehileng. Thempereichara ea metsi e ka 'na ea se ke ea e-ba oona feela mohloli oa mocheso o ka amang tekanyo ea khatello ea li-valve tsa polasetiki - mocheso o phahameng ka ntle o lokela ho ba karolo ea ho nahanisisa ka moralo. Maemong a mang, ho se etse moralo oa mocheso oa ka ntle oa liphaephe ho ka baka ho fokotseha ho feteletseng ka lebaka la khaello ea lisebelisoa tsa liphaephe. PVC e na le mocheso o phahameng oa tšebeletso oa 140 ° F; CPVC e na le boholo ba 220 ° F; PP e na le boholo ba 180°F.
Li-valve tsa li-ball, li-check valves, li-valve tsa serurubele le li-diaphragm li fumaneha ho e 'ngoe le e 'ngoe ea lisebelisoa tse fapaneng tsa thermoplastic bakeng sa kemiso ea lipeipi tsa khatello ea 80 tse nang le mefuta e mengata ea likhetho le lisebelisoa. Valve e tloaelehileng ea bolo e atisa ho fumanoa e le moralo oa 'nete oa bonngoe ho thusa ho tlosoa ha' mele oa valve bakeng sa tlhokomelo ntle le tšitiso ea ho kopanya liphaephe. Li-valve tsa ho hlahloba thermoplastic li fumaneha e le licheke tsa bolo, licheke tsa swing, y-checks le li-cone checks. Li-valve tsa butterfly li kopana habonolo le li-flange tsa tšepe hobane li lumellana le likoti tsa bolt, li-bolt circles le litekanyo tse akaretsang tsa ANSI Class 150. Bophara bo boreleli ba ka hare ba likarolo tsa thermoplastic bo eketsa feela taolo e nepahetseng ea li-valve tsa diaphragm.
Li-valve tsa bolo ho PVC le CPVC li etsoa ke lik'hamphani tse 'maloa tsa US le tsa kantle ho naha ka boholo ba 1/2 inch ho ea ho 6 inches tse nang le socket, khoele kapa flanged. Moralo oa 'nete oa bonngoe oa li-valve tsa mehleng ea kajeno o kenyelletsa linate tse peli tse thibang 'meleng, tse hatellang litiiso tsa elastomeric lipakeng tsa' mele le lihokelo tsa pheletso. Baetsi ba bang ba bolokile li-valve tsa bolo e tšoanang bolelele le likhoele tsa linate ka lilemo tse mashome ho lumella hore ho be bonolo ho nkela li-valve tsa khale ntle le ho fetola liphaephe tse kopaneng.
Ho kenya valve ea serurubele sa polasetiki ho bonolo hobane li-valve tsena li entsoe hore e be setaele sa li-wafer tse nang le litiiso tsa elastomeric tse etselitsoeng 'mele. Ha ba hloke ho eketsoa ha gasket. E behiloe pakeng tsa li-flange tse peli tsa ho nyalana, ho koala ha valve ea serurubele sa polasetiki ho tlameha ho sebetsoa ka hloko ka ho nyolohela torque ea bolt e khothalletsoang ka mekhahlelo e meraro. Sena se etsoa ho etsa bonnete ba hore ho na le tiiso e lekaneng holim'a metsi le hore ha ho na khatello e sa lekaneng ea mochine e sebelisoang holim'a valve.
Nako ea poso: Dec-24-2019 