Le hoja e ka bonahala e le lintlha tse nyenyane, lisebelisoa tsa O-ring tsa valve li bohlokoa haholo. Thepa e ka etsa qeto ea ho mamella mocheso oa tiiso. E boetse e fa tiiso ho hanyetsa lik'hemik'hale, 'me mefuta e meng ea rabara e tsamaisana le maro a fapaneng. Lisebelisoa tse peli tse tloaelehileng bakeng sa li-valve tsa 'nete tsa bolo ea bonngoe ke Viton le EPDM.

Viton (setšoantšo se ka ho le letona) ke rabara ea maiketsetso e nang le lik'hemik'hale tse phahameng le ho hanyetsa mocheso. EPDM e emetse Ethylene Propylene Diene Monomer mme e na le lisebelisoa tsa eona tse etsang hore e be thepa e tsebahalang haholo ea O-ring. Ha ho bapisoa Viton le EPDM, lintlha tse 'maloa li tlameha ho nkoa: ho mamella mocheso, ho lumellana ha lik'hemik'hale, le litšenyehelo. Tsoela pele ho bala bakeng sa papiso e felletseng.

Litiiso tsa rabara tsa EPDM
EPDM rabaraEPDM rabara) ke rabara e rarahaneng le e theko e tlaase e nang le mefuta e mengata ea tšebeliso. Hangata e sebelisetsoa ho thibela metsi ho marulelo hobane EPDM e tiisa hantle. Hape ke thepa e tloaelehileng bakeng sa litiiso tsa sehatsetsi hobane ke insulator ebile e na le khanyetso e ntle haholo ea mocheso o tlase. Ka ho khetheha, EPDM e sebetsa ka katleho mocheso oa -49F ho 293F (-45C ho 145C), e leng se etsang hore e be se loketseng bakeng sa likopo ho mocheso ofe kapa ofe.

Le hoja li-rubber tse ngata li hanyetsa mocheso o phahameng, ke tse seng kae feela tse khonang ho sebetsana le mocheso o tlaase joaloka EPDM. Sena se etsa hore e be khetho ea pele ho mang kapa mang ea lekang ho tiisa libakeng tse batang kapa ka thepa e batang. Li-Valves tsa 'Nete tsa Union Ball tse nang leEPDM Tiisitsoe O-RingsLikopo tse tloaelehileng tsa EPDM li kenyelletsa ho kenya motlakase, lithapo tsa letamo, lipeipi tsa metsi, babokelli ba liphanele tsa letsatsi, li-ring tsa O, le tse ling.

Ho phaella ho mamello e kholo ea mocheso, EPDM e na le khanyetso e pharaletseng ea lik'hemik'hale. Tsena li kenyelletsa metsi a chesang, mouoane, li-detergents, li-caustic potash solutions, sodium hydroxide solutions, oli ea silicone / mafura, le li-acid tse ngata tse hlapolotsoeng le lik'hemik'hale. Ha e loketse ho sebelisoa le lihlahisoa tsa oli ea diminerale tse kang oli ea ho tlotsa, oli kapa mafura. Bakeng sa tšebelisano e khethehileng ea lik'hemik'hale tsa EPDM, tlanya mona. Lintho tsena tse tsotehang, tse kopantsoeng le theko ea eona e tlaase, li etsa hore EPDM e be thepa ea ho tiisa e ratoang haholo.

Litiiso tsa Viton
Viton ke rabara ea maiketsetso le elastomer ea fluoropolymer. "Fluoropolymer" e bolela hore thepa ena e na le khanyetso e phahameng ea li-solvents, acids le metheo. Lentsoe "elastomer" ha e le hantle le ka fetoleloa le "rabara". Re ke ke ra bua ka phapang pakeng tsa elastomer le rabara mona, empa re tla tšohla hore na ke eng e etsang hore Viton e be e ikhethang. Hangata thepa e khetholloa ka 'mala o motala kapa o sootho, empa se hlileng se khethollang ke ho teteana ha eona. Boima ba Viton bo phahame haholo ho feta mefuta e mengata ea rabara, e leng se etsang hore Viton e be e 'ngoe ea tse matla ka ho fetisisa.

Viton e na le mocheso o pharaletseng oa ho mamella mocheso ho tloha ho -4F ho isa ho 410F (-20C ho isa ho 210C). Lithempereichara tse phahameng tseo Viton e khonang ho li mamella li etsa hore e be e loketseng bakeng sa lisebelisoa tsa mocheso o phahameng. Viton e sebelisoa hangata ho O-rings, liatlana tse hanyetsanang le lik'hemik'hale le lihlahisoa tse ling tse bōpiloeng kapa tse extruded. Li-O-rings tse entsoeng ka Viton li ntle bakeng sa scuba diving, lienjineri tsa likoloi le li-valve tse fapaneng.

Ha ho tluoa tabeng ea khanyetso ea lik'hemik'hale, Viton ha e bapisoe. E hanela ho bola ho tsoa mekelikeli le lik'hemik'hale tse fapaneng tse fapaneng ho feta elastomer efe kapa efe e se nang fluorinated. Ho fapana le EPDM, Viton e lumellana le oli, mafura, mafura le li-acid tse ngata tsa inorganic. E boetse e hanana haholo le khatello, oxidation ea sepakapaka, khanya ea letsatsi, boemo ba leholimo, mafura a koloi a nang le oksijene, aromatics, fungus, hlobo, le tse ling. Hape ka tlhaho ha e chese ho feta liraba tse ling tse ngata. Bala haholoanyane ka lintho tseo u lokelang ho li etsa le tseo u sa lokelang ho li etsa ka lik'hemik'hale tsa Viton.

Bothata bo boholo ka Viton ke theko ea eona. Tlhahisong, e bitsa chelete e ka bang makhetlo a 8 ho feta ho etsa thepa e lekanang le ea EPDM. Ha u reka sehlahisoa se nang le palo e nyenyane feela ea lisebelisoa tsena tsa rabara, theko e ka 'na ea se ke ea fapana haholo. Empa ha o reka ka bongata, o ka lebella hore likarolo tsa Viton li be theko e boima haholo ho feta EPDM.

Litiiso tsa Viton le EPDM
Chate ea Viton vs EPDM Ho Tiisa Rubber

Joale ke boitsebiso bofe bo molemo ka ho fetisisa? Lipotso tsena ha lia loka ka ho felletseng. Lisebelisoa ka bobeli li na le lits'ebetso tse ikhethileng moo li loketseng hantle, kahoo tsohle li ipapisitse le mosebetsi oo li tla beng li o etsa. C ea ronaPVC Ball Check Valvesle CPVC Swing Check Valves li fumaneha ka litiiso tsa Viton kapa litiiso tsa EPDM. Litiiso tsena li entsoe ka li-O-rings tse kentsoeng ka har'a li-fittings. Li-valve tsena kaofela li etselitsoe ho aroloa habonolo bakeng sa tlhokomelo e bonolo, kahoo li na le 'mele e tlosoang.

Haeba o hloka valve bakeng sa tsamaiso ea metsi, ho sa tsotellehe mocheso, valve e nang le tiiso ea EPDM hangata ke khetho e ntle ka ho fetisisa. Ntle le ho mamella mocheso o fapaneng hanyane, phapang e kholo lipakeng tsa lisebelisoa tsena tse peli ke khanyetso ea bona ea lik'hemik'hale. Viton e ntle bakeng sa tšebeliso ea mafura le lisebelisoa tse ling tse senyang, empa ha o sebetsana le ntho e se nang molato joaloka metsi, ho tšoarella hona ho feteletseng ha ho hlokahale.