Ke hāʻule nei kāu mau sila valve i ka wela a me ka lā wela. ʻO kēia ke alakaʻi i nā leaka pipiʻi, ka manawa hana ʻole o ka ʻōnaehana, a me nā mea kūʻai aku hauʻoli ʻole e nīnau nei i ka maikaʻi o kāu huahana a me kou kaulana.

No nā aniau wela, ʻoi aku ka maikaʻi o ka EPDM no kekahi noi wai i hōʻike ʻia i ka lā a me ke aniau ma muli o kona kūpaʻa maikaʻi loa i ka UV a me ka ozone. E hoʻohana i ka NBR wale nō no nā noi i loko e pili ana i nā aila, kahi i pale ʻia ai mai ka lā.

Ua kamaʻilio au me kaʻu hoa ʻo Budi mai Indonesia e pili ana i kahi pilikia mau i kū i kekahi o kāna mau mea kūʻai aku. Ke holo nei lākou i kahi mahiʻai aquaculture nui kahi i hoʻokomo ʻia ai nā haneli o kā mākou mau valves ma waho. Ma hope o ʻeono mahina wale nō, ua hoʻomaka ka nui e liki. Ua maikaʻi nā valves, akā ua haki nā sila NBR maʻamau i loko a lilo i mea palupalu. He pilikia maʻamau kēia i nā aniau tropical. ʻO ka hui pū ʻana o ka lā ikaika, ka wela kiʻekiʻe, a me ka haʻahaʻa e luku ana i ka rubber. Ua kōkua mākou iā lākou e hoʻololi i nā valves me kā mākouNā sila EPDM, a ua nalo aku ka pilikia. Hōʻike maikaʻi kēia ʻike i ke kumu he mea koʻikoʻi loa ke koho ʻana i nā mea i nā wahi wela.

ʻO wai ka mea maikaʻi loa no nā ʻāina wela, NBR a i ʻole EPDM?

ʻOi aku ka liʻiliʻi o ke kumukūʻai o nā sila NBR, kahi mea maikaʻi loa ke nānā aku ma kahi ʻōlelo kūʻai. Akā, e hoʻihoʻi anei kēia mālama kālā i ka wā e pala koke ai nā sila ma lalo o ka lā wela a me ka wela?

No nā ʻōnaehana wai wela, ʻoi aku ka maikaʻi o ka EPDM. Kūkulu ʻia kona ʻano kemika e kūʻē i ka UV, ka ozone, a me ka wela. ʻO ke kūpaʻa maikaʻi ʻole o NBR i ka wā e lilo ia i koho pilikia nui no kekahi hoʻohana waho ma kahi ʻāina wela.

ʻAʻole kēia he manaʻo; he mea ia o ke kemika. Loaʻa iā EPDM ka mea i kapa ʻia heiwi kuamoʻo polymer i hoʻopiha ʻia. He kūpaʻa kūlohelohe kēia ʻano paʻa i ka hoʻouka ʻana mai ka radiation UV a me ka ozone, ʻelua mau mea i nui i kahi aniau lā a me ka tropical. ʻO NBR, ma ka ʻaoʻao ʻē aʻe, he iwi kuamoʻo unsaturated me nā pilina pālua. ʻO kēia mau pilina pālua he mau wahi nāwaliwali e haki maʻalahi ʻia e nā kukuna UV, e lilo ai ka mea i mea palupalu a nahā. Ma kahi e like me Indonesia a i ʻole Vietnam, ke alo nei kahi ʻōnaehana hoʻoinu wai waho a i ʻole ka mālama wai i ka lā mau loa. Hiki ke hāʻule kahi sila NBR ma lalo o hoʻokahi makahiki. Hiki i kahi sila EPDM ma ke kaiapuni like ke mau no nā makahiki he nui. ʻO ke kumukūʻai mua kiʻekiʻe iki o ka EPDM he kumukūʻai liʻiliʻi e uku ai no ka hilinaʻi lōʻihi a me ka pale ʻana i ka hāʻule ʻana o ka ʻōnaehana. ʻO ka loiloi kumukūʻai-pōmaikaʻi e makemake nui ana i ka EPDM no kekahi noi waho.

He aha nā hemahema o ka laholio EPDM?

Me he mea lā kūpono loa ka EPDM no nā paipu wai o waho. Akā he aha ka mea e hana ai inā loaʻa i loko o ka wai nā aila a i ʻole nā ​​​​​​kemika hydrocarbon? ʻO ka hoʻopili hewa ʻana hiki ke hana i ka hāʻule loa o ke sila.

ʻO ka hemahema nui o ka EPDM ʻo ia kona kūpaʻa maikaʻi ʻole i nā wai i hana ʻia ma ka petroleum e like me nā aila, nā ʻaila, a me nā mea hoʻoheheʻe he nui. ʻO ka hoʻopili ʻana me kēia mau mea e hoʻoulu ai i ka sila EPDM e pehu, palupalu, a nalowale kona hiki ke sila.

ʻO ke kānāwai i ka kemika, "like dissolves like." He mea non-polar ka EPDM, a pēlā nō hoʻi nā aila hydrocarbon. Ke hoʻopili lākou, hoʻopili ka EPDM i ka aila, e pehu ai e like me ka huʻa. Hoʻonāwaliwali nui kēia pehu i ka mea a hoʻopau i kona hiki ke hoʻopaʻa i kahi sila ma lalo o ke kaomi. ʻO kēia ka mea kūpono ʻole no nā noi e pili ana i nā laina wahie, nā ʻōnaehana hydraulic, a i ʻole nā ​​​​kaʻina hana kemika he nui. ʻO kekahi hemahema ʻē aʻe ke kumukūʻai. He polymer holomua ka EPDM, no laila ʻoi aku ke kiʻekiʻe o kāna kumukūʻai hana ma mua o NBR. ʻO ia ke kumu i ʻike pinepine ʻia ai he koho premium. Eia nō naʻe, he mea nui e nānā i kēia kumukūʻai ma ke ʻano o ka noi. No ka hana kūpono (wai, ke aniau, ka wela), ʻo ke kumukūʻai mua kiʻekiʻe e kūʻai iā ʻoe i nā makahiki o ka lawelawe pilikia ʻole, e hoʻemi ana i kona kumukūʻai holoʻokoʻa o ka loaʻa ʻana.

He aha nā hemahema nui o NBR?

ʻO NBR ke kūlana haʻahaʻa ke kumukūʻai no nā noi he nui. Akā, ʻo kona kūpaʻa maikaʻi ʻole i ka wā hiki ke alakaʻi i ka nahā a me ka hāʻule ʻana, kahi pilikia nui i kekahi wahi waho wela.

ʻO ka hemahema nui o NBR ʻo ia kona kūpaʻa haʻahaʻa loa i ka lā (UV), ka ozone, a me ka ʻino maʻamau. ʻO kēia ke kumu e paʻakikī ai a palupalu. Loaʻa iā ia kahi helu mahana kiʻekiʻe loa ma mua o ka EPDM, e hoʻolalelale ana i kona ʻelemakule ʻana i nā aniau wela.

No kahi mākeke e like me Budi ma Indonesia, ʻo kēia ka mea nui loa e hoʻomaopopo ai. ʻO ka hui pū ʻana o ka lā ikaika a puni ka makahiki a me ka wela kiʻekiʻe o ke kaiapuni ʻino loa no NBR. Hoʻouka pololei ka radiation UV i nā kaulahao polymer, ʻoiai ʻo ka wela e hoʻolalelale i kēia kaʻina hana ʻelemakule. ʻO kēia ke kumu e nalowale ai ka mea i kona palupalu, ʻo ia kāna hana nui. ʻAʻole hiki i kahi sila palupalu ke hoʻopaʻa e hoʻōki i kahi leak; nahā wale ia ma lalo o ke kaomi. ʻO ia ke kumu e ʻike ai mākou i nā hemahema he nui o nā valves NBR-sila maʻamau i ka mahiʻai tropical a me ka plumbing waho. Pili pū kēia nāwaliwali i ka ozone. Hoʻopuka kūlohelohe ʻia ka Ozone e ka lā a hoʻohana ʻia hoʻi i kekahi mau ʻōnaehana hoʻomaʻemaʻe wai holomua. ʻOiai nā ʻāpana liʻiliʻi o ka ozone e hoʻohaʻahaʻa koke iā NBR. I ka pōkole, ʻo ka hoʻohana ʻana iā NBR no kekahi noi waho ma nā tropics ke piliwaiwai nei me ka hilinaʻi o kāu huahana a me kou kaulana.

He kūpaʻa maoli anei ka laholio NBR i ka wela no nā ʻāina wela?

ʻIke ʻoe i kahi helu mahana no ka laholio NBR ma kahi pepa kikoʻī. Akā, hilinaʻi anei kēlā helu i kahi ʻano wela maoli kahi i kiʻekiʻe loa ai nā mahana ambient?

He kūpaʻa iki ka NBR i ka wela, maʻamau a hiki i 120°C (248°F). Eia nō naʻe, emi kēia palena me ka hoʻomau ʻana o ka ʻike ʻana. ʻO ka hui pū ʻana o ka wela ambient kiʻekiʻe a me ka wela hana ma nā wahi wela e hiki ai ke hoʻokuke iā NBR i kona mau palena, e hoʻoulu ai i ka hāʻule mua ʻana.

Hiki ke kuhihewa kahi pepa kikoʻī inā ʻaʻole heluhelu pono ʻia. ʻO kēlā helu 120°C pinepine no ka wela intermittent, ʻaʻole mau. I ke aniau tropical, hiki i ka mahana ambient ke 35°C. Hiki i kahi valve e noho ana i ka lā pololei ma luna o kahi hale ke hiki maʻalahi i nā mahana o ka ʻili o 70°C a ʻoi aku paha, ma mua o ke kahe ʻana o ka wai wela ma o ia mea. Hoʻokomo kēia ukana wela mau i ka mea NBR ma lalo o ke kaumaha mau loa. ʻO EPDM, me kāna helu maʻamau o 150°C, he palena palekana nui aʻe. Hiki iā ia ke lawelawe maʻalahi i ke kaumaha i hui pū ʻia o ka wela ambient kiʻekiʻe a me nā wai hana wela me ka ʻole o ka hōʻino ʻana. ʻO kēia ʻoi aku ka maikaʻikūpaʻa welaʻo ia kekahi kumu nui a mākou e paipai ikaika nei i ka EPDM no ka hana lōʻihi i nā aniau wela.

Hōʻuluʻulu Manaʻo Hana o ke Aniau Tropical

Hopena

No nā noi wai wela, he mea nui ka pale ʻana o ka EPDM i ka UV a me ka wela. E mālama i ka NBR no nā ʻōnaehana pale i loko e lawelawe ana i nā aila. ʻO ke koho kūpono e hōʻoiaʻiʻo i ka hana lōʻihi a hilinaʻi hoʻi.