ʻO ka valve plastik kahi ʻano valve i hoʻohana nui ʻia, loaʻa iā ia nā mea maikaʻi o ka pale ʻana i ka corrosion, ke kaumaha māmā, ka pale ʻana i ka lole, a me nā mea ʻē aʻe.ʻO kēia ka moʻolelo hoʻomohala o nā kiwi plastik.
I ka makahiki 1950, me ka ulu wikiwiki ʻana o ka ʻoihana kemika, ua piʻi mālie ka noi no nā valves.I kēia manawa, ua hoʻohana nui ʻia nā mea plastic i ka ʻoihana ʻoihana, no laila ua hoʻomaka kekahi mau ʻenekinia e aʻo pehea e hoʻopili ai i nā mea plastic i ka hana ʻana i nā valve.Ua hana nui ʻia nā kiwi palaka mua me ka polyvinyl chloride (PVC), nona ka pale ʻana i ka corrosion maikaʻi, akā ʻilihune kona mau ʻano mechanical a kūpono wale no ka haʻahaʻa haʻahaʻa a me ka haʻahaʻa haʻahaʻa hana.
I nā makahiki 1960, me ka hoʻomau mau ʻana o ka ʻenehana plastics, polypropylene (PP), polytetrafluoroethylene (PTFE) a me nā mea ʻē aʻe i hoʻohana ʻia i ka hana ʻana i nā kilika plastic.ʻOi aku ka maikaʻi o kēia mau mea ʻenehana a me ka pale ʻana i ka corrosion, a hiki ke hoʻololi i kahi ākea o nā wahi hana.
I ka 1970s, me ka oo ana o ka plastic valve 'enehana, ua hoʻokomo 'ia i nā 'ano o ka hou plastic valves, e like me polyvinyl fluoride (PVDF) kiwikā, aniani kila kiwikā, etc. hoʻololi i ka ʻoihana ʻoi aku ka koi.
I ka hoʻomaka ʻana o ke kenekulia 21, me ka hoʻonui ʻana i ka ʻike o ka mālama ʻana i ke kaiapuni, ke piʻi aʻe nei nā koi no nā valves.I kēia manawa, ua hoʻohana ʻia kekahi mau mea palaki hou i ka hana ʻana i nā valves, e like me ka polyetherketone (PEEK), polyimide (PI) a me nā mea plastic kiʻekiʻe.ʻOi aku ka maikaʻi o kēia mau mea me nā ʻano mechanical a me ka pale ʻana i ka corrosion, a hiki ke hoʻokō i ka ʻoihana ʻoi aku ka koi.
I ka pōkole, me ka hoʻomohala ʻana o ka ʻoihana kemika a me ka hoʻomau mau ʻana o ka ʻenehana plastics, ua ʻike nā valve plastic i ka hoʻomohala ʻana o nā mea plastic kiʻekiʻe mai nā mea PVC mua a hiki i kēia manawa, e hoʻomaikaʻi mau ana i kā lākou corrosion resistance, mechanical properties and scope of noi, lilo i mea koʻikoʻi a pono ʻole no nā ʻoihana kemika, petrochemical a me nā ʻoihana palekana.
Ka manawa hoʻouna: Mar-02-2023