Akadomo gato kari imbere muri valve yawe karacika, bigatera amazi menshi. Uku gucika intege gutunguranye bituma sisitemu idakora neza, kwangirika gukabije, ndetse n'abakiriya batishimye bashinja ibicuruzwa byawe ko bifite inenge.

Hitamo EPDM mu bikorwa byinshi bishingiye ku mazi, cyane cyane iyo umuntu ahura n'izuba, cyangwa umwuka wa ozone. Hitamo NBR mu bikorwa birimo amavuta, amavuta, ibinure, cyangwa amazi akomoka kuri hydrocarbon. Guhitamo neza biterwa gusa n'amazi n'ibidukikije.

Narimo mvugana na mugenzi wanjye Budi ku kibazo umwe mu bakiriya be yari afite. Bari batangaga valves zo korora amafi muri Indoneziya zakoreshagamoteri za ozonekugira ngo amazi akomeze kuba meza. Nyuma y'amezi make, valves zatangiye kuva. Ikibazo nticyari igice cy'icyuma gifunga; cyari ibifunga bisanzwe bya NBR imbere. Ozone yari irimo kwibasira rabber, bituma icika intege. Twabagiriye inama yo guhindura ba valves zifite ibifunga bya EPDM, kandi ikibazo cyakemutse ako kanya. Utu duce duto tw'ibikoresho ni two tugena intsinzi cyangwa gutsindwa k'umushinga.

Ni ikihe cyiza kurusha ibindi, EPDM cyangwa NBR?

Ubona uburyo bubiri bwo gufunga valve, kandi uburyo bwa NBR burahendutse. Urashaka kuyihitamo kugira ngo uzigame amafaranga, ariko uhangayikishijwe nuko ishobora kuba atari yo cyemezo gikwiye.

Muri rusange nta bikoresho na kimwe cyiza kurusha ibindi; byagenewe imirimo itandukanye. EPDM ni nziza ku mazi, ikirere, no ku bushyuhe. NBR ni nziza ku bushyuhe, amavuta n'amavuta.

Gutekereza ko umuntu ari "mwiza" gusa ni ikosa rikunze kubaho. Amahitamo ni ay'uko ibintu bihuye n'ibinyabutabire.EPDM (Ethylene Propylene Diene Monomer)ifite imiterere ihamye cyane ya shimi ituma irwanya cyane imihindagurikire y'ikirere, imirasire y'izuba (UV), ozone, ndetse n'amazi ashyushye n'akonje. Ibi bituma iba amahitamo meza ku nganda nyinshi zikora ibijyanye n'amazi nko kuhira, pisine, n'amazi akoreshwa mu byuma bisanzwe.NBR (Nitrile Butadiene Rubber)Ku rundi ruhande, izwiho kurwanya amavuta, ibicanwa n'ibinure bikomoka kuri peteroli. Ariko, irangirika vuba iyo ihuye n'urumuri rwa ozone na UV. Rero, niba valve ari iy'umuyoboro w'amazi, EPDM ni yo mahitamo meza. Niba ari iy'amavuta akoreshwa mu gutunganya cyangwa imiti imwe n'imwe, NBR ni cyo gisubizo cyonyine gikwiye.

Ni irihe tandukaniro riri hagati ya EPDM na PVC rubber?

Umukiriya wawe arimo kubaza ibyerekeye "umugozi" uri muri valve. Biroroshye kwitiranya pulasitiki ikomeye y'umubiri wa valve n'ibikoresho byoroshye bikoreshwa mu gufunga imbere muri yo.

Ni ibikoresho bitandukanye cyane ku mirimo itandukanye. PVC ni thermoplastic ikomeye ikoreshwa mu gukora umubiri wa valve n'umupira wayo. EPDM ni rubber yoroshye ikoreshwa mu gukora impeta za O n'intebe zikora ikimenyetso.

Iki ni ikintu gikunze kugaragara mu rujijo. Reka tubishyire mu buryo bworoshye cyane. Tekereza kuri vali nk'urugi. PVC ni urugi rukomeye kandi rukomeye, ndetse n'urugi ubwarwo. Itanga imiterere n'imbaraga. EPDM ni uruvange rw'amashanyarazi rushobora gukuraho ikirere ruhuza uru ruvange. Iyo ufunze urugi, uruvange rw'amashanyarazi rurakomera kugira ngo rukore agapfundikizo keza kandi kadapfa amazi. Ntushobora gukora urugi ukoresheje uruvange rw'amashanyarazi, kandi ntushobora gukora agapfundikizo gakomeye ukoresheje uruvange rw'urugi rukomeye. Muri vali zacu, PVC itanga ahantu hadashyirwa umwuka. EPDM itanga ibice byoroshye kandi byoroshye imbere bihagarika amazi gutemba. Nta kintu kitwa "PVC rubber" kiba muri izi vali; uruvange ni ibikoresho byihariye kandi byihariye.

Ni irihe tandukaniro riri hagati ya EPDM na NBR 70?

Urimo kureba urupapuro rw'ibisobanuro ukareba “NBR 70″. Uzi icyo NBR ari cyo, ariko ntuzi neza icyo umubare “70″ usobanura cyangwa uko ugereranywa na EPDM.

"70″ muri NBR 70 yerekeza kuri durometer yayo, cyangwa igipimo cy'ubukomere. Igaragaza uburyo rubber ikomeye. EPDM na NBR byombi biza mu bukomere butandukanye, aho 70 Shore A ari ibipimo bisanzwe.

Umubare si igice cy'ubwoko bw'ibikoresho; ni igipimo cy'imiterere yabyo. Ubukomere bw'amabara yoroshye bupimirwa ku "Inkombe A"igipimo". Durometero ya 70 ni ubukana busanzwe cyane, hagati mu muhanda. Irakomeye bihagije kugira ngo idasunikwa inyuma y'aho iri ariko iracyafite ubushobozi bwo gufunga neza. Ushobora kubona NBR 50 (yoroshye) cyangwa NBR 90 (igoye cyane). Ibi ni ko bimeze no kuri EPDM; ushobora kugira EPDM 70. Rero, igereranya nyaryo rihora riri hagati y'ibikoresho by'ibanze—EPDM vs. NBR. Inomero y'ubukana ikwereka niba ikwiranye n'umuvuduko wa sisitemu yawe. Ku bikorwa byinshi bisanzwe byo mu mazi n'umwuka, agakoresho ko gufunga ka durometer 70 gatanga uburinganire butunganye mu mikorere no kuramba.

Igipimo cy'ubushyuhe cya EPDM ugereranyije na NBR ni ikihe?

Ugomba guhitamo valve y'uburyo bushobora gushyuha cyane ku zuba cyangwa bukonje cyane mu gihe cy'itumba. Guhitamo agafunga kadashobora kwihanganira ubushyuhe bizatuma gacika intege kandi kagacika.

EPDM ifite ubushyuhe buri hejuru, ubusanzwe kuva kuri -50°C kugeza 150°C (-58°F kugeza 302°F). NBR ifite ubushyuhe buke, ubusanzwe kuva kuri -40°C kugeza 120°C (-40°F kugeza 248°F).

Imikorere y'ubushyuhe ni impamvu nyamukuru ituma EPDM ikunze kuba amahitamo meza cyane. Ubushobozi bwayo bwo kugumana ubushyuhe bwinshi mu bushyuhe buri hasi cyane butuma yizewe cyane mu bihe bikonje. Ubushyuhe bwayo bwo hejuru cyane butuma ishobora gufata imiyoboro y'amazi ashyushye kandi ntishobora kwangirika cyane mu bikoresho byicaye ku zuba rishyushye. Nubwo NBR ari nziza, ishobora gukomera no kwangirika iyo ikonje cyane, ibyo bikaba byakwangiza ubushobozi bwayo bwo gufunga. Mu bushyuhe bwinshi, ishobora gusaza no gukomera vuba kurusha EPDM. Niyo mpamvu mu Bushinwa, valve nyinshi zisanzwe kandi zihendutse zikoresha NBR, ariko buri gihe dusaba EPDM gukoresha iyo ari yo yose ihura n'ubushyuhe bukabije cyangwa isaba kwizerwa igihe kirekire.

Kugereranya byihuse ibikoresho bifunze

Umwanzuro

Ku bijyanye n'amazi, ikirere, n'ubushyuhe bukabije, hitamo EPDM. Ku bijyanye n'amavuta n'ibicanwa, hitamo NBR. Guhuza iki gipfundikizo n'ikoreshwa ni ibanga ryo kugira valve ya PVC yizewe, imara igihe kirekire kandi idasohoka.