Ma hope o ke Kaua Honua ʻElua, ʻike ʻia ka ʻike ʻana o kahi kiwi pōpō.ʻOiai ʻo ka mea i hoʻokumu ʻia i ka pōleʻa pōleʻa mai ka hoʻomaka ʻana o ke kenekulia 20, ʻaʻole i hoʻopau kēia patent structural i kāna mau hana kūʻai ma muli o nā palena o ka ʻoihana waiwai a me ka ʻoihana hana mīkini.Ua hoʻokumu ʻo DuPont ma ʻAmelika Hui Pū ʻIa i kahi mea polymer kiʻekiʻe polytetrafluoroethylene (PTFE) plastik a hiki i 1943. ʻO kēia ʻano mea he mau mea maikaʻi o ka lawa ʻana o ka tensile a me ka ikaika compressive, kekahi elastoplasticity, nā waiwai lubricating maikaʻi a me ke kūpaʻa corrosion maikaʻi loa. mea hoʻopaʻa paʻa a loaʻa ka hopena hoʻopaʻa hilinaʻi.Eia kekahi, hiki ke hana ʻia kahi pōpō me ka pōʻai kiʻekiʻe a me ka hoʻopau ʻana i ka ʻili maikaʻi ma ke ʻano he lālā pani o ka valve pōpō ma muli o ka hoʻomohala ʻana o nā mīkini wili pōpō.ʻO kahi ʻano valve hou me ka pahu piha a me 90 ° rotatory angular huakaʻi komo i ka mākeke valve, e huki nui ana.Hoʻololi mālie ʻia nā huahana valve kuʻuna e like me nā pahu pani, nā kīwaha ʻīpuka, nā kiwi palaka a me nā kīwaha butterfly e hoʻololi mālie ʻia e nā kiwi pōpō, a hoʻohana nui ʻia nā kiwi pōleʻa, mai nā anawaena liʻiliʻi a hiki i nā anawaena nui, haʻahaʻa haʻahaʻa a kiʻekiʻe, wela maʻamau a kiʻekiʻe wela, kiʻekiʻe wela a haʻahaʻa wela.I kēia manawa, ua hiki ke anawaena kiʻekiʻe o ka valve pōpō i ka 60 Inch, a hiki i ka haʻahaʻa haʻahaʻa ke hiki i ka wai hydrogen wela -254 ℃. Hiki ke kiʻekiʻe loa ka mahana mai 850 a 900 ℃.ʻO kēia mau mea a pau e kūpono i nā ʻano pāpaʻi āpau, i lilo i ʻano ʻoi loa o ka valve.

Hiki ke hoʻokaʻawale ʻia nā kiwi pōleʻa i loko o nā kiwi pōpō lana a me nā kiwi pōpō trunnion ma muli o ke ʻano.

Hiki ke hoʻokaʻawale ʻia nā kiwi pōpō i loko o nā kiwi pōpō komo kiʻekiʻe a me nā kiwi pōpō komo ʻaoʻao.Hiki ke hoʻokaʻawale ʻia nā kiwi pōpō ʻaoʻao i hoʻokahi ʻāpana pōleʻa, ʻelua ʻāpana pōleʻa a me ʻekolu mau ʻāpana pōleʻa e like me ke ʻano o ke kino kiwi.Hoʻokahi ʻāpana ʻāpana pōleʻa 'valve kino he integral;ʻO nā ʻāpana pōleʻa ʻelua ʻāpana o nā kino kiwi nui a me nā kino kīpē kōkua a me nā ʻāpana kinipōpō ʻekolu i haku ʻia me hoʻokahi kino kiwi nui a me ʻelua kino valve kōkua.

Hiki ke hoʻokaʻawale ʻia nā kiwi pōleʻa i loko o nā kiwi pōpō palupalu paʻa a me nā kiwi pōpō paʻa paʻa e like me ka mea hoʻopaʻa pahu.He mau mea polymer kiʻekiʻe e like me ka polytetrafluoroethylene (PTFE), polytetrafluoroethylene i hoʻoikaika ʻia a me ka nylon a me ka lāʻau.ʻO nā mea hoʻopaʻa paʻa o nā kiwi pōpō paʻa paʻa he metala.