Ua hāʻule kahi sila liʻiliʻi i loko o kāu kiwikā, e hana ana i kahi leaka nui. ʻO kēia hemahema i manaʻo ʻole ʻia e alakaʻi ai i ka wā pau ʻole o ka ʻōnaehana, ka pōʻino pipiʻi, a me nā mea kūʻai aku hauʻoli ʻole e hoʻopiʻi nei i kāu huahana no ka hewa.

E koho i ka EPDM no ka hapa nui o nā noi wai, ʻoi aku hoʻi me ka ʻike ʻana i waho, ka lā, a i ʻole ka ozone. E koho iā NBR no nā noi e pili ana i nā aila, nā ʻaila, nā momona, a i ʻole nā ​​​​wai hydrocarbon. ʻO ke koho kūpono e hilinaʻi wale ʻia i ka wai a me ke kaiapuni.

Ua kamaʻilio au me kaʻu hoa ʻo Budi e pili ana i kahi pilikia i loaʻa i kekahi o kāna mau mea kūʻai aku. Ke hoʻolako nei lākou i nā kiwikā no kahi hana mahi iʻa ma Indonesia i hoʻohananā mea hana ozonee mālama i ka wai i maʻemaʻe. Ma hope o kekahi mau mahina, ua hoʻomaka nā kiwikā e liki. ʻAʻole ke kino kiwikā ka pilikia; ʻo ia nā sila NBR maʻamau i loko. Ke hoʻouka nei ka ozone i ka laholio, e hoʻolilo ana iā ia i mea palupalu. Ua aʻo aku mākou iā lākou e hoʻololi i nā kiwikā me nā sila EPDM, a ua hoʻoponopono koke ʻia ka pilikia. ʻO kēia mau kikoʻī mea liʻiliʻi e hoʻoholo ai i ka holomua a i ʻole ka hāʻule ʻana o kahi papahana.

ʻO wai ka mea maikaʻi, EPDM a i ʻole NBR?

ʻIke ʻoe i ʻelua mau koho sila no kahi kiwikā, a ʻoi aku ka makepono o ke koho NBR. Hoʻowalewale ʻia ʻoe e koho iā ia e mālama i nā kumukūʻai, akā hopohopo ʻoe ʻaʻole paha ia ka hoʻoholo kūpono.

ʻAʻole ʻoi aku ka maikaʻi o kekahi o nā mea ma ke ʻano holoʻokoʻa; ua hoʻolālā ʻia lākou no nā hana like ʻole. ʻOi aku ka maikaʻi o ka EPDM no ka pale ʻana i ka wai, ke aniau, a me ka wela. ʻOi aku ka maikaʻi o NBR no ke kūpaʻa ʻana i nā aila, nā wahie, a me nā momona.

He kuhihewa maʻamau ka manaʻo ʻana he "ʻoi aku ka maikaʻi". ʻO ke koho e pili ana i ka launa pū ʻana o nā kemika.ʻEPDM (Ethylene Propylene Diene Monomer)He ʻano kemika paʻa loa kona e kūpaʻa loa ai i ka ʻino, ka lā (UV), ka ozone, a me ka wai wela a me ke anuanu. ʻO kēia ka mea kūpono loa no ka hapa nui o nā ʻoihana e pili ana i ka wai e like me ka hoʻoinu wai, nā loko ʻauʻau, a me nā paipu maʻamau.NBR (Nitrile Butadiene Rubber), ma ka ʻaoʻao ʻē aʻe, ua ʻike ʻia no kona kūpaʻa maikaʻi loa i nā aila, nā wahie, a me nā momona i hoʻokumu ʻia i ka petroleum. Eia nō naʻe, haki koke ia ke hōʻike ʻia i ka ozone a me ka mālamalama UV. No laila, inā no ka laina wai ka valve, ʻo EPDM ke koho maikaʻi loa. Inā no kahi ʻōnaehana e lawelawe ana i nā aila a i ʻole kekahi mau kemika, ʻo NBR wale nō ka pane kūpono.

He aha ka ʻokoʻa ma waena o ka EPDM a me ka laholio PVC?

Ke nīnau nei kāu mea kūʻai aku e pili ana i ka "laholio" i loko o ka valve. He mea maʻalahi ke huikau ma waena o ka palakiko paʻa o ke kino valve a me ka mea palupalu i hoʻohana ʻia no nā sila i loko.

He ʻokoʻa loa nā mea hana no nā hana like ʻole. He thermoplastic paʻa ka PVC i hoʻohana ʻia e hana i ke kino a me ka pōpō o ka valve. He laholio synthetic palupalu ka EPDM i hoʻohana ʻia e hana i nā O-rings a me nā noho e hana ana i ka sila.

He wahi kēia o ka huikau pinepine. E maʻalahi loa kākou. E noʻonoʻo i ka valve e like me ka puka. ʻO ka PVC ka mōlina puka ikaika a paʻa a me ka puka ponoʻī. Hāʻawi ia i ke ʻano a me ka ikaika. ʻO ka EPDM ka ʻili pale wela palupalu e hoʻopili ana i ka mōlina. Ke pani ʻoe i ka puka, ʻomi ka ʻili pale wela e hana i kahi sila kūpono a paʻa i ka wai. ʻAʻole hiki iā ʻoe ke hana i kahi puka mai ka ʻili pale wela, a ʻaʻole hiki iā ʻoe ke hana i kahi sila palupalu mai kahi mōlina puka paʻa. I loko o kā mākou mau valves, hāʻawi ka PVC i ka hale pale kaomi. Hāʻawi ka EPDM i nā ʻāpana palupalu a palupalu i loko e hoʻōki maoli i ke kahe ʻana o ka wai. ʻAʻohe mea e like me ka sila "PVC rubber" i loko o kēia mau valves; he mea kūikawā a kaʻawale nā ​​sila.

He aha ka ʻokoʻa ma waena o EPDM a me NBR 70?

Ke nānā nei ʻoe i kahi pepa kikoʻī a ʻike iā "NBR 70". Ua ʻike ʻoe i ke ʻano o NBR, akā ʻaʻole ʻoe maopopo i ke ʻano o ka helu "70" a pehea hoʻi e hoʻohālikelike ai me EPDM.

ʻO ka "70" ma NBR 70 e pili ana i kona durometer, a i ʻole ka helu paʻakikī. Hōʻike ia i ke ʻano o ka paʻakikī o ka laholio. Loaʻa iā EPDM a me NBR nā ʻano paʻakikī like ʻole, me 70 Shore A ke kūlana maʻamau.

ʻAʻole ka helu he ʻāpana o ke ʻano mea; he ana ia o kona mau waiwai kino. Ana ʻia ka paʻakikī no nā ʻōpala palupalu ma kahi "Kahakai A"unahi. ʻO ka durometer o 70 kahi paʻakikī maʻamau, waena o ke alanui. He paʻa ia e pale aku i ka hoʻokuke ʻia ʻana mai kahi ma lalo o ke kaomi akā lawa ka maʻalahi e hana i kahi sila maikaʻi. Hiki iā ʻoe ke loaʻa iā NBR 50 (palupalu) a i ʻole NBR 90 (paʻakikī loa). Pili like ia i ka EPDM; hiki iā ʻoe ke loaʻa iā EPDM 70 pū kekahi. No laila, ʻo ka hoʻohālikelike maoli ma waena o nā mea kumu—EPDM vs. NBR. Hōʻike ka helu paʻakikī iā ʻoe inā kūpono ia no ke kaomi o kāu ʻōnaehana. No ka hapa nui o nā noi wai a me ka ea maʻamau, hāʻawi kahi sila durometer 70 i ke kaulike kūpono o ka hana a me ke kūpaʻa.

He aha ka helu mahana o EPDM vs NBR?

Pono ʻoe e koho i kahi kiwikā no kahi ʻōnaehana e wela loa i ka lā a i ʻole ke anu loa i ka hoʻoilo. ʻO ke koho ʻana i kahi sila i hiki ʻole ke hoʻomanawanui i ka mahana e lilo ia i mea palupalu a liki.

ʻOi aku ka maikaʻi o ka pae mahana o ka EPDM, ma ke ʻano maʻamau mai -50°C a i 150°C (-58°F a i 302°F). ʻOi aku ka palena o ka pae mahana o ka NBR, maʻamau mai -40°C a i 120°C (-40°F a i 248°F).

ʻO ka hana mahana kekahi kumu nui no ke koho pinepine ʻana o ka EPDM i ka premium. ʻO kona hiki ke noho palupalu i nā mahana haʻahaʻa loa e ʻoi aku ka hilinaʻi i nā aniau anuanu. ʻO kona mahana kiʻekiʻe loa ke ʻano hiki iā ia ke lawelawe i nā laina wai wela a ʻaʻole hiki ke palaho i nā lako e noho ana i ka lā wela. ʻOiai maikaʻi ʻo NBR, hiki ke lilo i paʻakikī a palupalu ke anuanu loa, hiki ke hoʻopilikia i kona hiki ke sila. I nā mahana kiʻekiʻe, hiki iā ia ke ʻelemakule a paʻakikī wikiwiki ma mua o EPDM. ʻO ia ke kumu ma Kina, hoʻohana ka nui o nā valves maʻamau, haʻahaʻa ke kumu kūʻai iā NBR, akā paipai mau mākou iā EPDM no kekahi noi e kū nei i nā wela kiʻekiʻe a i ʻole e koi ana i ka hilinaʻi lōʻihi.

Hoʻohālikelike wikiwiki i ka mea sila

Hopena

No ka wai, ke aniau, a me nā mahana koʻikoʻi, e koho iā EPDM. No nā aila a me nā wahie, e koho iā NBR. ʻO ka hoʻohālikelike ʻana i ke sila i ka noi ka mea huna i kahi kiwikā PVC hilinaʻi, lōʻihi, a ʻaʻohe leaka.