Yasekwa ngo-1900, iZurn ngumvelisi ohamba phambili wehlabathi weevalvu, iimveliso zemibhobho kunye nezinye iimveliso zoshishino. I-Zurn izimisele ukusombulula izisombululo zamanzi kunye nolwelo kwiikontraka, abanini bezakhiwo kunye nabasebenzisi bokugqibela. IZurn okwangoku inamaziko okuvelisa amaninzi kunye namaziko okusasaza kwihlabathi liphela, anokubonelela ngeenkonzo ezikhawulezayo nezisebenzayo kubathengi baseMntla Melika.

I-Oatey yasekwa ngo-1916. Phantse i-100+ leminyaka, i-Oatey ibibonelela ngeevalvu ezithembekileyo nezikumgangatho ophezulu, imibhobho kunye nezinto ezifakelwayo kwiindawo zokuhlala, zorhwebo kunye nezoshishino. U-Oatey uzibophelele ekuphuculeni nasekuphuculeni umgangatho wokuphila kwabantu ngeemveliso kunye neenkonzo zobungcali. I-Oatey inenkqubo yokusasaza ebanzi yokubonelela ngezisombululo zobungcali kwiikontraka, abakhi kunye neenjineli kumashishini ahlukeneyo.

I-Viega yasekwa kwi-1899 kwaye ikomkhulu laseJamani. Okwangoku, iimveliso zeViega ziveliswa kwiindawo ezi-6 zamazwe ngamazwe kwaye zisasazwa kwihlabathi jikelele. I-Viega ineqela lobuchwephesha lobuchwephesha, elijolise kwinkonzo ekuboneleleni ngezisombululo ezilungiselelwe iinjineli, abaqulunqi kunye nabasasazi beklasi yokuqala. Ukususela kulwazi lwemveliso ukuya kwinkxaso yokuthengisa emva kokuthengisa, iqela leViega liya kuyithatha ngokungathí sina.

I-Apollo Valves yasekwa kwi-1975 kwaye iyinxalenye yeQela le-Aalberts. I-Aalberts izibophelele ekuboneleleni abathengi ngeenkqubo ezidibeneyo zombhobho, iimveliso zamashishini kunye nezixhobo ukunceda abathengi bagqibe umsebenzi wabo ngokulula nangokufanelekileyo.
Iimveliso ze-Apollo zeValve ziquka iivalve zebhola zobhedu, iivalve zebhola zensimbi engenasici, iivalve zebhola zentsimbi yekhabhoni njalo njalo.

Kwiminyaka emininzi, i-Neles ibonelele ngeevalvu zobuchwephesha kunye nezisombululo ezizenzekelayo kwioyile kunye negesi, iphepha kunye nepulp, ibhayoloji, ezonyango kunye namayeza, kunye namashishini okutya. I-Neles ineengcali zobuchwephesha ezingama-2950 ezinolwazi olomeleleyo lwemveliso kunye nolwazi lweshishini ukunceda abathengi bagqibe umsebenzi wabo ngokuthembekileyo nangempumelelo.