Damper butterfly valve or what we call Ventilation butterfly valve is mostly used in air conditioning system for industrial blast furnace gas production power generation, metallurgy and mining, steel making, the medium is air or flue gas.Ko te waahi tono kei runga i te ara matua o te punaha whakangao, i te punaha puhipuhi auahi ranei, no reira ka nui te rahi o te takirere.

Ko te mahi matua o te kaihoroi ko te whakatika i te tere o te rere, ko nga whakaritenga mo te hiri kaore i te teitei, ka whakaaetia he nui o te rerenga.Ko te tikanga, ka hiahiatia te mana o waho ki te taraiwa, penei i nga tikanga hiko, pneumatic ranei.

He ngawari noa te hanga o te riipene damfer, he pereti rerehua o te raina waenga me te kakau takirere.Na te nui o te aputa i waenga i te pereti rerehua me te tinana takirere, he nui te mokowā roha, na reira ka taea te aukati i te toronga waiariki me te whakahekenga na te huringa o te pāmahana i te wa e whakamahia ana, kaore e puta te ahuatanga o te kōpae.

Te painga o te hanganga Damper:

• Karekau he raruraru i te wa e huri ana, he roa rawa te ora o te ratonga,
• Na he iti tona parenga rere, he nui te tohanga, a ka kore e pa ki te roha pāmahana teitei
• ngawari, ngawari, tere te mahi