ʻOiai paha he mea liʻiliʻi ia, he mea nui loa ka mea O-ring o ka valve. Hiki i ka mea ke hoʻoholo i ka hoʻomanawanui mahana o ke sila. Hāʻawi pū ia i ke sila i kekahi kū'ē kemika, a kūpono kekahi ʻano rapa me nā wai like ʻole. ʻElua mau mea maʻamau no nā valves pōpō uniona maoli ʻo Viton lāua ʻo EPDM.

ʻO Viton (kiʻi ma ka ʻākau) he laholio synthetic me ke kūpaʻa kiʻekiʻe i nā kemika a me ka mahana. ʻO EPDM ke kū nei no Ethylene Propylene Diene Monomer a he mau waiwai ponoʻī kona e hoʻolilo ai iā ia i mea kaulana loa i ka O-ring. I ka hoʻohālikelike ʻana iā Viton me EPDM, pono e noʻonoʻo ʻia kekahi mau mea: ke ahonui i ka mahana, ka kūlike o nā kemika, a me ke kumukūʻai. E heluhelu no ka hoʻohālikelike piha.

Nā sila laholio EPDM
laholio EPDM (Laho EPDM) he laholio paʻakikī a makepono hoʻi me nā ʻano hoʻohana like ʻole. Hoʻohana pinepine ʻia ia no ka pale ʻana i ka wai o ka hale no ka mea e sila maikaʻi ana ka EPDM. He mea maʻamau nō hoʻi ia no nā sila hau no ka mea he mea hoʻokaʻawale ia a he kūpaʻa maikaʻi loa i ka mahana haʻahaʻa. ʻO ke kikoʻī, hana pono ka EPDM ma ka pae mahana o -49F a i 293F (-45C a i 145C), e kūpono ai no nā noi ma kekahi mahana.

ʻOiai he nui nā ʻōpala e kū i ke kiʻekiʻe o ka mahana, he kakaikahi wale nō ke hiki ke lawelawe i nā mahana haʻahaʻa e like me ka EPDM. ʻO kēia ka mea e koho mua ai no kekahi e hoʻāʻo nei e sila i nā wahi anuanu a i ʻole me nā mea anuanu. ʻO True Union Ball Valves meNā apo-O i sila ʻia ʻo EPDMʻO nā noi maʻamau no ka EPDM e komo pū me ka insulation uila, nā uhi loko iʻa, nā plumbing, nā mea hōʻiliʻili panel solar, nā O-rings, a me nā mea hou aku.

Ma waho aʻe o ka hoʻomanawanui wela nui aʻe, loaʻa i ka EPDM kahi kūpaʻa kemika ākea. ʻO kēia mau mea ka wai wela, ka mahu, nā mea holoi, nā hopena potash caustic, nā hopena sodium hydroxide, ka ʻaila/grease silicone, a me nā waikawa a me nā kemika i hoʻoheheʻe ʻia. ʻAʻole kūpono ia no ka hoʻohana ʻana me nā huahana ʻaila mineral e like me nā ʻaila lubricating, nā ʻaila a i ʻole nā ​​​​wahie. No ka hoʻohālikelike kemika kikoʻī o EPDM, kaomi ma aneʻi. ʻO kēia mau waiwai kupaianaha, i hui pū ʻia me kona kumukūʻai haʻahaʻa, e hoʻolilo iā EPDM i mea sila kaulana loa.

Nā sila Viton
He elastomer ʻo Viton no ka laholio synthetic a me ka fluoropolymer. ʻO ke ʻano o "Fluoropolymer" he kiʻekiʻe ke kūpaʻa o kēia mea i nā mea hoʻoheheʻe, nā waikawa a me nā kumu. ʻO ka huaʻōlelo "elastomer" he mea hiki ke hoʻololi ʻia me ka "laholio". ʻAʻole mākou e kūkākūkā i ka ʻokoʻa ma waena o ka elastomer a me ka laholio ma aneʻi, akā e kūkākūkā mākou i ka mea e kūikawā ai ʻo Viton. Hoʻohālikelike pinepine ʻia ka mea e ke kala ʻōmaʻomaʻo a ʻeleʻele paha, akā ʻo ka mea e hoʻokaʻawale maoli ai ʻo ia kona nui. ʻOi aku ka nui o ka nui o Viton ma mua o ka hapa nui o nā ʻano laholio, e hana ana i ka sila Viton kekahi o nā mea ikaika loa.

Loaʻa iā Viton kahi laulā o ka hoʻomanawanui wela mai -4F a i 410F (-20C a i 210C). ʻO nā mahana kiʻekiʻe e hiki ai iā Viton ke kū i ka mea kūpono ia no nā noi wela kiʻekiʻe. Hoʻohana pinepine ʻia ʻo Viton i nā O-ring, nā mīkina lima pale kemika a me nā huahana ʻē aʻe i hoʻoheheʻe ʻia a i hoʻopuka ʻia paha. He maikaʻi nā O-ring i hana ʻia mai Viton no ka luʻu scuba, nā ʻenekini kaʻa a me nā valves like ʻole.

I ka wā e pili ana i ke kūpaʻa kemika, ʻaʻohe mea like ʻo Viton. Kūʻē ia i ka pala mai nā ʻano wai a me nā kemika like ʻole ma mua o nā elastomer ʻaʻole fluorinated. ʻAʻole like me ka EPDM, kūpono ʻo Viton me nā aila, nā wahie, nā lubricants a me ka hapa nui o nā waikawa inorganic. He kūpaʻa loa hoʻi ia i ka compression, ka oxidation atmospheric, ka lā, ka weathering, nā wahie motika oxygenated, nā aromatics, nā fungi, ka mold, a me nā mea hou aku. He ʻoi aku kona kūpaʻa i ka puhi ʻana ma mua o ka hapa nui o nā rubbers ʻē aʻe. E heluhelu hou aʻe e pili ana i nā mea e pono ai a me nā mea ʻaʻole e pono ai o nā kemika Viton.

ʻO ka pilikia nui me ka Viton ʻo ia kona kumukūʻai. I ka hana ʻana, ʻewalu manawa ka nui o ke kumukūʻai e hana ai i ka nui like o nā mea me ka EPDM. I ke kūʻai ʻana i kahi huahana i loaʻa wale kahi liʻiliʻi o kēia mau mea laholio, ʻaʻole paha e ʻokoʻa nui ke kumukūʻai. Akā i ke kauoha ʻana i nā nui he nui, hiki iā ʻoe ke manaʻo e ʻoi aku ke kumukūʻai o nā ʻāpana Viton ma mua o ka EPDM.

Nā sila Viton a me EPDM
Pakuhi Laho Sila ʻo Viton vs EPDM

No laila, ʻo wai ka mea maikaʻi loa? ʻAʻole kūpono loa kēia mau nīnau. Loaʻa i nā mea ʻelua nā noi kikoʻī kahi e kūpono ai lākou, no laila e pili ana ia i ka hana a lākou e hana ai. ʻO kā mākou CNā kiwikā nānā pōpō PVCa loaʻa nā kiwikā nānā CPVC Swing me nā sila Viton a i ʻole nā ​​sila EPDM. Hana ʻia kēia mau sila me nā apo-O i hoʻokomo ʻia i loko o nā mea hoʻopili. Ua hoʻolālā ʻia kēia mau kiwikā a pau e wehe maʻalahi ʻia no ka mālama maʻalahi, no laila he mau kino hiki ke wehe ʻia.

Inā makemake ʻoe i kahi kiwikā no kahi ʻōnaehana wai, me ka nānā ʻole i ka mahana, ʻo kahi kiwikā me kahi sila EPDM ka mea maikaʻi loa. Ma waho aʻe o nā ʻokoʻa iki o ka hoʻomanawanui ʻana i ka mahana, ʻo ka ʻokoʻa nui ma waena o nā mea ʻelua ko lākou kūpaʻa kemika. He mea maikaʻi ʻo Viton no ka hoʻohana ʻana me ka wahie a me nā mea ʻino ʻē aʻe, akā i ka wā e hana ai me kahi mea ʻino e like me ka wai, ʻaʻole pono kēia kūpaʻa koʻikoʻi.