ʻO ka valve kahi mea e hoʻomalu ai i ke kahe, kaomi, a me ke kuhikuhi ʻana o kahi wai.ʻO ka wai i hoʻomaluʻia he wai, he kinoea, he hui kinoea-wai, aiʻole he hui paʻa-wai.ʻO ka pahu maʻamau e ke kino valve, ka uhi, ka noho, nā ʻāpana wehe a pani ʻia, ka mīkini hoʻokele, nā sila a me nā mea paʻa, a pēlā aku.ʻO ka hana hoʻomalu o ka valve e pili ana i ka mīkini hoʻokele a i ʻole ka wai e hoʻokele i ka hāpai ʻana, ka hoʻoheheʻe ʻana, ke kowali a i ʻole ka neʻe ʻana o ka neʻe ʻana o ka wehe a pani ʻana e hoʻololi i ka nui o ka wahi holo.

He ākea ka hoʻohana ʻana o ka valves a pili loa i ke ola o ka poʻe i kēlā me kēia lā, e like me nā paipu no nā paipu wai a me nā kiwi hoʻohaʻahaʻa i ke kaomi no nā kapuahi ʻaila ʻaila liquefied.He mau mea koʻikoʻi nō hoʻi ʻo Valves i nā ʻano mīkini like ʻole e like me nā ʻenekini hoʻopau i loko, nā ʻenekini mahu, nā compressors, nā pamu, nā mea hana pneumatic, nā kaʻa hydraulic drive system, nā moku a me nā mokulele.

Ma mua o ka makahiki 2,000 BC, ua hoʻohana ka poʻe Kina i nā paipu ʻohe a me nā pahu pahu i nā paipu wai, nā ʻīpuka wai i nā kahawai wai, a me nā kīwaha e nānā i ka pā i ka hoʻoheheʻe ʻana i lalo me ka hoʻomohala ʻana o ka ʻenehana hoʻoheheʻe a me nā mīkini hydraulic, ke keleawe a me ke alakaʻi plug valves ua ʻike ʻia ma ʻEulopa.Me ka hoʻokomo ʻana o ka paila, ua hoʻokomo ʻo 1681 i ka valve palekana ʻano lever hammer.ʻO 1769 a ʻo nā kiwi hoʻopaʻa ʻia nā kiwi kumu mua a hiki i ka mīkini mahu Watt.ʻO ka mea hou o ka mīkini mahu i lawe mai i ka valve i loko o ke kahua o ka ʻoihana mechanical.Ma waho aʻe o ka plug, relief and check valves i hoʻohana ʻia i nā ʻenekini mahu o Watt, hoʻohana ʻia nā kiwi lele e hoʻoponopono i ke kahe.Me ka piʻi ʻana o ka mahu a me ke kaomi ʻana, ʻaʻole hiki ke hoʻokō i nā pono o ka hoʻohana ʻana i ka valve plug no ka mālama ʻana i ka hoʻokomo ʻana o ka mahu a me ka pau ʻana o ka ʻenekini mokuahi, no laila aia kahi pahu paheʻe.

Ma mua a ma hope o ka makahiki 1840, aia nā kiwi honua me nā ʻōpuʻu wili a me nā ʻūhā Wedge me nā ʻōpala i hoʻopaʻa ʻia ʻo Trapezoidal, ʻo ia ka mea nui i ka ulu ʻana o ka valve.ʻAʻole wale ka ʻike ʻana o kēia mau ʻano valve ʻelua i ka piʻi ʻana o ke koi o ke kaomi a me ka mahana ma nā ʻoihana like ʻole i kēlā manawa, akā ua hoʻokō pū kekahi i ka koi o ka hoʻoponopono kahe.Mai ia manawa, me ka hoʻomohala ʻana o ka ʻoihana mana uila, ʻoihana ʻaila, ʻoihana kemika a me ka ʻoihana hana moku, ua hoʻomohala wikiwiki ʻia nā ʻano kīʻaha kiʻekiʻe a me waena.

Ma hope o ke Kaua Honuaʻelua, ma muli o ka hoʻomohalaʻana i nā mea polymer, nā mea lubricating, nā kila kila a me nā carbide e pili ana i ka cobalt, ua hoʻohanaʻia ka Old Plug Valve a me ka valve butterfly i nā noi hou, ua hoʻomohala wikiwikiʻia ka valve ball a me ka diaphragm valve.ʻO nā kiwi honua, nā ʻīpuka puka a me nā ʻano ʻē aʻe i hoʻonui ʻia a me ka maikaʻi.Ua lilo mālie ka ʻoihana hana Valve i ʻāpana koʻikoʻi o ka ʻoihana mīkini.Hiki ke hoʻokaʻawale ʻia ʻo Valve e like me ka hoʻohana ʻana i ka hana i loko o ka valve block, control valve, check valve, diversion valve, safety valve, multi-purpose valve 6 waeʻano.