Ua hoʻokumu ʻia ʻo OHL i ka makahiki 1867 a ʻo ia kekahi o nā mea hana nui o nā valve ʻoihana ma Kelemānia. Hana ʻia nā huahana āpau ma Kelemania a hana ʻia e like me nā kūlana EU a me nā kūlana honua.
Loaʻa nā huahana i nā kiwi lele lele eccentric triple, nā valve lelelele noho elastic, nā valve lele waena a pēlā aku. Hoʻohana nui ia i ka ʻoihana kemika, ka ikehu o ka lā, ka hana moku, ka mālama wai, ka ʻoihana pepa a pēlā aku.

Hoʻokumu ʻia ma 1872, ʻo VAG kahi hui valve aia ma Kelemānia. Loaʻa iā VAG nā limahana 1,100 ma ka honua holoʻokoʻa, e hāʻawi ana i nā lawelawe valve wikiwiki a maʻalahi i nā mea kūʻai mai a puni ka honua.
Hoʻokumu ʻo VAG i ka hāʻawi ʻana i nā ʻōnaehana kaʻina hana hou no nā dams, nā mea kanu wai, a me nā ʻoihana wai inu.
Loaʻa i nā huahana nā kīwaha papalua-offset butterfly, Centric butterfly valve a pēlā aku.

Ua ʻoi aku ʻo Parker ma mua o 100 mau makahiki a ua hāʻawi ʻo ia i kahi ʻano hoʻonā wai piha piha i nā mea kūʻai ʻoihana ʻoihana honua a i ʻole nā ​​​​mea kūʻai aku e kōkua i nā mea kūʻai aku e hoʻoponopono i kā lākou mau pilikia.
Aia ʻo Parker i ka mea kūʻai aku a hāʻawi i nā ʻano hoʻolālā like ʻole o nā valve butterfly e hoʻokō i nā pono o ka mea kūʻai. Ma waho aʻe o nā valve butterfly, hāʻawi pū ʻo Parker i nā ʻano mea hana ʻenehana āu e koho ai. He mea hoʻolako hilinaʻi ʻo Parker.

Ua hoʻokumu ʻia ʻo Burgmer i ka makahiki 1967 a ʻo ia ke keʻena nui ma Kelemānia, e hana ana i ka hana ʻana i nā valve butterfly. Hana ʻia nā valve āpau e like me nā kūlana ISO9001: 2018. Hāʻawi i nā kiwi lele lele kiʻekiʻe no nā mea kūʻai aku ʻoihana. Ke lawelawe nei i ka ʻoihana mālama wai, ʻoihana hana moku, ʻoihana pulp, ʻoihana hana mana, etc.

Hoʻokumu ʻia i ka makahiki 1966, ua kūpaʻa ʻo BK Armaturen i ka hāʻawi ʻana i nā mea kūʻai aku me nā huahana maʻamau kiʻekiʻe a me nā lawelawe lawe wikiwiki. Ma ka manawa like, ʻo BK ka noi a me nā valve i hoʻonohonoho pono ʻia e hāʻawi i nā mea kūʻai aku i nā hoʻonā kaʻina hana kūpono.
Loaʻa nā huahana i nā kiwi lele eccentric, nā kiwi lele concentric, PTFE lined butterfly valves a pēlā aku.