OHL idakhazikitsidwa mu 1867 ndipo pano ndi m'modzi mwa opanga ma valve m'mafakitale ku Germany. Zogulitsa zonse zimapangidwa ku Germany ndipo zimapangidwa motsatira kwambiri EU komanso miyezo yapadziko lonse lapansi.
Zogulitsa zimaphatikizapo mavavu agulugufe atatu, zotanuka mpando agulugufe mavavu, pakati agulugufe mavavu ndi zina zotero. Amagwiritsidwa ntchito kwambiri m'makampani opanga mankhwala, mphamvu za dzuwa, kumanga zombo, kuchiritsa madzi, makampani opanga mapepala ndi zina zotero.

Yakhazikitsidwa mu 1872, VAG ndi kampani ya valve yomwe ili ku Germany. VAG ili ndi antchito a 1,100 padziko lonse lapansi, omwe amapereka chithandizo cha valve mwamsanga komanso chosavuta kwa makasitomala ochokera padziko lonse lapansi.
VAG yadzipereka kupereka njira zamakono zowongolera madamu, malo opangira madzi, ndi ma network operekera madzi akumwa.
Zogulitsa zimaphatikizapo ma valve agulugufe a Double-offset, Centric butterfly valve ndi zina zotero.

Parker wakhala kwa zaka zoposa 100 ndipo wakhala akupereka mayankho athunthu a mankhwala amadzimadzi kwa makasitomala apadziko lonse lapansi kapena amalonda kuti athandize makasitomala kuthetsa mavuto awo.
Parker ndi wokonda makasitomala ndipo amapereka mitundu yosiyanasiyana ya ma valve agulugufe kuti akwaniritse zosowa za makasitomala. Kuphatikiza pa ma valve agulugufe, Parker imaperekanso zida zosiyanasiyana zamafakitale zomwe mungasankhe. Parker ndi ogulitsa odalirika.

Burgmer idakhazikitsidwa mu 1967 ndipo imayang'anira ku Germany, ikugwira ntchito yopanga ma valve agulugufe. Ma valve onse amapangidwa motsatira ISO9001: 2018 miyezo. Perekani ma valve agulugufe apamwamba kwambiri kwa makasitomala ogulitsa mafakitale. Kutumikira makampani mankhwala madzi, shipbuilding makampani, zamkati makampani, makampani opanga magetsi, etc.

Yakhazikitsidwa mu 1966, BK Armaturen yadzipereka kupatsa makasitomala zinthu zapamwamba kwambiri komanso ntchito zotumizira mwachangu. Panthawi imodzimodziyo, BK ndi mavavu ogwiritsidwa ntchito komanso opangidwa makonda kuti apatse makasitomala njira zowongolera zofananira.
Zogulitsa zimaphatikizapo ma eccentric agulugufe mavavu, mavavu agulugufe okhazikika, ma valve agulugufe okhala ndi PTFE ndi zina zotero.