Lisebelisoa tsa Kaho (Thermoplastics):polymer® PTFE (Polytetrafluoroethylene),PVDF (Polyvinylidene Fluoride),PP (Polypropylene),CPVC (Chlorinated Polyvinyl Chloride),PVC (Polyvinyl Chloride)
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PVC (Polyvinyl Chloride)
Khetho e phahameng ka ho fetisisa le e kholo ka ho fetisisa ea li-valve tsa Chemline li bōptjoa ho tloha PVC.E fana ka thepa e babatsehang ea ho hanyetsa mechine le lik'hemik'hale ka theko e tlaase.Mocheso o sebetsang oa li-valve tsa PVC ke 0 ho 60 ° C (30 ho 140 ° F).PVC e sebelisetsoang li-valve tsa Chemline e khetholloa ka palo ea lisele tsa 11564-A ho ea ka ASTM Standard D 1784. Sehlomathi "A" se bolela tekanyo e phahameng ka ho fetisisa ea lik'hemik'hale tsa lik'hemik'hale.Li-valve tse ling tse ngata tsa PVC hammoho le pipe le lisebelisoa li na le "B" feela ea ho hanyetsa lik'hemik'hale tsa lik'hemik'hale. Motsoako o khethehileng oa PVC "A" o sebelisoang ka li-valve tsa Chemline o hanyetsa tlhaselo ea li-acids tse ngata, alkalais e matla, letsoai le lik'hemik'hale tse ling tse ngata.Khanyetso e phahameng ea lik'hemik'hale ea thepa ena e lumella tšebeliso ea eona litšebeletsong tse mabifi tse kang 98% H2 SO4, chlorine e omileng le khase e tlaase ea chlorine e nang le khatello e tlaase.PVC e hlaseloa ke li-hydrocarbon tse chlorine, li-ketone, li-ester le metsoako e meng e nkhang hamonate.E ka sebelisoa ho litharollo tse nang le li-solvents tse fihlang ho 1000 ppm. Li-valve tsa Chemline PVC ha li na chefo.Li kopana le CSA e tloaelehileng ea B137.0 bakeng sa toxicity.Li khahlanong le liphello tse senyang tsa letsatsi le boemo ba leholimo, kahoo ho penta ha ho hlokahale.
CPVC (Chlorinated Polyvinyl Chloride)
CPVC e ts'oana haholo le PVC ka thepa ea mochini le ho hanyetsa lik'hemik'hale.E loketse likopo ho tloha ho 0 ho ea ho 95 ° C (30 ho 200 ° F). Motsoako o khethehileng oa CPVC o sebelisetsoang li-valve tsa Chemline o khetholloa e le 23567-A ho ea ka ASTM D 1784. Sehlomathi "A" se bolela ho lumellana le lik'hemik'hale tse phahameng ka ho fetisisa. tekanyo ea ho hanyetsa.Motsoako ona ha o chefo, o lumellana le litekanyetso tsa CSA tsa chefo tsa B137.0.CPVC li ipakile e le khetho e babatsehang bakeng sa likopo tsa mocheso o phahameng haholo bakeng sa PVC kapa ha ho hlokahala moeli o eketsehileng oa tšireletso.
PP (Polypropylene)
PP e boima bo bobebe ebile e na le khanyetso e phahameng ea lik'hemik'hale.Li-valve li loketse ts'ebeletso ho tloha ho -20 ho isa ho 90 ° C (-5 ° ho isa ho 195 ° F).PP ha e amehe ke alkalais, matsoai, metsoako ea tlhaho le li-acids tse ngata, haholo-holo hydrochloric le phosphoric acid.Ha e tšoanelehe ho li-acids tse matla, li-hydrocarbon tse chlorinated, metsoako e nkhang hamonate le likhahla tse phahameng tsa chlorine ea mahala.PP e inert haholo kahoo e tumme bakeng sa lits'ebetso tse phahameng tsa bohloeki tse kang metsi a deionized, joalo-joalo. Thepa e tla ka tloaelo e opaque ka ho eketsoa ha grey-beige pigment ho thibela. ho kenella ha leseli la ultraviolet.Lisebelisoa tsa tlhaho tse se nang 'mala o khanyang li tla senyeha haeba li ka pepesetsoa khanya ea UV (leseli la letsatsi).Chemline e fana ka pipe ea PP, li-fittings le li-valve ka PP e nang le mebala le e se nang 'mala, ka bobeli e amohetsoe ke FDA bakeng sa ho kopana le lijo.
PVDF (Polyvinylidene Fluoride)
PVDF e phahametse li-valve thermoplastics tse ling tse hanyetsanang le lik'hemik'hale le ho hanyetsa abrasion.E na le matla a tsotehang ho feta mocheso o moholo ka ho fetisisa oa ho sebetsa.Mocheso o sebetsang oa li-valve tsa PVDF ke -40 ho 120 ° C (-40 ho 250 ° F) Matla a matla a PVDF a feta a PVC habeli.Li-valve li tšoarella haholo tlas'a tlhekefetso ea mochini esita le ho -40 ° F.Li boetse li fana ka khanyetso e phahameng ka ho fetisisa ea abrasion ea li-valve tsa thermoplastic.PVDF e na le khanyetso e babatsehang ea lik'hemik'hale khahlanong le li-halogen tse kang chlorine le bromine, li-acids tse matla tse kang hydrofluoric le nitric acid, solvents organic le oli.PVDF ha e hanyetsane le li-bases tse chesang. Hape ha e chefo 'me ha e fane ka monko kapa tatso ea mokelikeli.PVDF ea rona e lumellana le litlhoko tsa USDA Title 21, P121.2593 bakeng sa ho kopana le lijo.Ho kenella ha khase ho PVDF ho tlase haholo.Sethibelo sa khase ea PVDF se nang le tokelo ea molao se fumaneha ho Type 14 le DV Series Diaphragm Valves.Ke tšehetso ea polymer® diaphragm mme e ipakile e eketsa bophelo ba li-valve tsa diaphragm ho chlorine le lits'ebeletso tse matla tsa asiti.
polymer® PTFE (Polytetrafluoroethylene)
PTFE e batla e sa qhibilihe ka ho feletseng ebile ha e kenelle ka lik'hemik'hale.E na le khanyetso e phahameng ea mocheso.litulo tsa bolo ea polymer® PTFE, ka lebaka la mafura a tlhaho, ha li hloke ho tlotsoa.polymer® PTFE diaphragms le flange gaskets li sebelisoa ts'ebetsong e matla ka ho fetisisa ea ho hanyetsa lik'hemik'hale.
Nako ea poso: May-11-2017