Chisimbiso chidiki chiri mukati mevharuvhu yako chinokundikana, zvichikonzera kubuda kwemvura yakawanda. Kukundikana uku kusingatarisirwi kunotungamira kukushanda kwesystem, kukuvara kunodhura, uye vatengi vasingafari vanopomera chigadzirwa chako kuti chine zvikanganiso.

Sarudza EPDM yekushandiswa kwakawanda kwemvura, kunyanya kana paine chiedza chekunze, chiedza chezuva, kana ozone. Sarudza NBR yekushandiswa kwemafuta, mafuta, mafuta, kana mvura inobva muhydrocarbon. Sarudzo chaiyo inoenderana zvachose nemvura uye nharaunda.

Ndaitaura nemumwe wangu Budi nezvedambudziko raiva nemumwe wevatengi vake. Vaitengesa mavharuvhu ebasa rekuchengeta hove muIndonesia raishandiswamajenareta e ozonekuchengetedza mvura yakachena. Mushure memwedzi mishoma, mavharuvhu akatanga kubuda. Dambudziko rakanga risiri muviri wevharuvhu; raive maNBR seals akajairwa mukati. Ozone yairwisa rabha, zvichiita kuti iome. Takavakurudzira kuti vachinje kumavharuvhu ane EPDM seals, uye dambudziko racho rakagadziriswa nekukasika. Ndiwo madiki aya ndiwo anosarudza kubudirira kana kukundikana kweprojekiti.

Ndeipi iri nani, EPDM kana NBR?

Unoona sarudzo mbiri dzekuvhara vharuvhu, uye sarudzo yeNBR yakachipa. Unonzwa uchida kuisarudza kuti usashandise mari yakawanda, asi unonetseka kuti ingave isiriyo sarudzo chaiyo.

Hapana chimwe chezvinhu zviri nani pane zvese; zvakagadzirirwa mabasa akasiyana. EPDM iri nani pakudzivirira mvura, mamiriro ekunze, uye kupisa. NBR iri nani pakudzivirira mafuta, mafuta, uye magirisi.

Kufunga kuti chimwe chinhu "chiri nani" chikanganiso chinowanzoitika. Sarudzo ndeyekuenderana kwemakemikari.EPDM (Ethylene Propylene Diene Monomer)ine chimiro chemakemikari chakasimba chinoita kuti irambe yakasimba pakupisa, chiedza chezuva (UV), ozone, nemvura inopisa neinotonhora. Izvi zvinoita kuti ive sarudzo yakakwana kumaindasitiri mazhinji ane chekuita nemvura akadai sekudiridza, madziva ekushambira, uye pombi dzemvura.NBR (Nitrile Butadiene Rabha), kune rumwe rutivi, inozivikanwa nekudzivirira kwayo mafuta, mafuta, uye mafuta anobva mupetroleum. Zvisinei, inokurumidza kupwanyika kana yaiswa muchiedza cheozone neUV. Saka, kana vharuvhu iri yemugero wemvura, EPDM ndiyo sarudzo iri nani. Kana iri yemafuta anobata sisitimu kana mamwe makemikari, NBR ndiyo mhinduro chaiyo chete.

Chii chakasiyana pakati peEPDM nePVC rabha?

Mutengi wako ari kubvunza nezve "rabha" iri muvharuvhu. Zviri nyore kuvhiringidzika pakati pepurasitiki yakasimba yemuviri wevharuvhu nezvinhu zvinochinjika zvinoshandiswa pakuisa zvisimbiso zviri mukati mayo.

Zvinhu zvakasiyana zvachose zvemabasa akasiyana. PVC ipurasitiki yakasimba inoshandiswa kugadzira muviri wevharuvhu nebhora. EPDM irabha yakagadzirwa inochinjika inoshandiswa kugadzira maO-rings nezvigaro zvinogadzira chisimbiso.

Iyi inyaya inonetsa nguva dzose. Ngatizviite zviri nyore. Funga nezvevharuvhu semusuwo. PVC ifuremu yemusuwo yakasimba, yakaoma uye gonhi pacharo. Inopa chimiro nesimba. EPDM irabha inochinjika inobvisa mamiriro ekunze inovhara furemu. Paunovhara gonhi, kubvisa mamiriro ekunze kunodzvanya kuti pave nechisimbiso chakakwana, chisingapindi mvura. Haugone kugadzira gonhi nekudzima mamiriro ekunze, uye haugone kugadzira chisimbiso chinochinjika kubva pafuremu yemusuwo yakasimba. Mumavharuvhu edu, PVC inopa imba inodzivirira kumanikidzwa. EPDM inopa zvikamu zvakapfava, zvinochinjika mukati zvinomisa kuyerera kwemvura. Hakuna chinhu chakadai se "PVC rabha" muvharuvhu idzi; zvisimbiso zvinhu zvakasiyana, zvakagadzirwa.

Musiyano uripo pakati peEPDM neNBR 70 ndeupi?

Uri kutarisa pepa rezvinotsanangurwa wobva waona “NBR 70″. Unoziva kuti NBR chii, asi hauna chokwadi kuti nhamba “70″ inorevei kana kuti inoenzaniswa sei neEPDM.

"70″ muNBR 70 inoreva durometer yayo, kana kuti chiyero chekuomarara. Inoratidza kuti rabha yacho yakaoma sei. EPDM neNBR zvese zviri zviviri zvinouya nekuomarara kwakasiyana-siyana, uye 70 Shore A iri chiyero chakajairika.

Nhamba yacho haisi chikamu chemhando yezvinhu; inoyera hunhu hwayo hwepanyama. Kuoma kwemarabha akapfava kunoyerwa pa "Shongwe A"Chikero." Durometer ye70 inyaya yakaoma zvikuru, iri pakati nepakati pemugwagwa. Yakasimba zvakakwana kuti isasundirwe panzvimbo yayo kana yamanikidzwa asi ichiri kuchinjika zvakakwana kuti igadzire chisimbiso chakanaka. Unogona kuwana NBR 50 (yakapfava) kana NBR 90 (yakaoma zvikuru). Izvi zvinoshandawo kuEPDM; unogona kuva neEPDM 70 futi. Saka, kuenzanisa chaiko kunogara kuri pakati pezvinhu zvekutanga—EPDM vs. NBRNhamba yekuomarara inokuudza kana yakakodzera kumanikidzwa kwesystem yako. Kune akawanda mashandisirwo emvura nemhepo, chisimbiso che70 durometer chinopa chiyero chakakwana chekushanda uye kugara kwenguva refu.

Chii chinonzi tembiricha yeEPDM kana NBR?

Unofanira kusarudza vharuvhu yesystem inogona kupisa zvakanyanya muzuva kana kutonhora zvakanyanya muchando. Kusarudza chisimbiso chisingakwanise kubata tembiricha kuchaita kuti itsvedze uye idonhedze mvura.

EPDM ine tembiricha yepamusoro, kazhinji kubva pa -50°C kusvika 150°C (-58°F kusvika 302°F). NBR ine tembiricha shoma, kazhinji kubva pa -40°C kusvika 120°C (-40°F kusvika 248°F).

Kushanda zvakanaka kwetembiricha ndicho chikonzero chikuru chinoita kuti EPDM ive sarudzo yepamusoro. Kugona kwayo kugara ichichinjika kana tembiricha yakaderera kunoita kuti ive yakavimbika zvikuru kana kuchitonhora. Tembiricha yayo yepamusoro-soro zvinoreva kuti inogona kubata migero yemvura inopisa uye hainyanyi kuora mumidziyo inogara muzuva rinopisa. NBR, kunyange zvazvo yakanaka, inogona kuoma uye kupwanyika kana yanyanya kutonhora, izvo zvinogona kukanganisa kugona kwayo kuvhara. Kana tembiricha yakakwira, inogona kukura nekuoma nekukurumidza kupfuura EPDM. Ndokusaka muChina, mavharuvhu mazhinji akajairwa, asingadhuri anoshandisa NBR, asi tinogara tichikurudzira EPDM kune chero chishandiso chinotarisana netembiricha yakanyanyisa kana chinoda kuvimbika kwenguva refu.

Kuenzanisa Zvinhu Nechisimbiso Nokukurumidza

Mhedziso

Kana paine mvura, mamiriro ekunze, uye tembiricha yakanyanya, sarudza EPDM. Kana paine mafuta nemafuta, sarudza NBR. Kufananidza chisimbiso nechishandiso ndicho chakavanzika chevharuvhu yePVC yakavimbika, inogara kwenguva refu, isingadonhedze mvura.