Ko te rewharewharewharewha i mua i tuuhia hei paera rerenga, ka whakamahia noa hei pereti takirere.
Tae rawa ki te tau 1950 ka whakamahia te rapa waihanga, ka pania te rapa waihanga ki te whakakai nohoanga o te rewharewharewharewha, a, ka puta te tuatahitanga o te rapa rewharewha hei whao tapahi.
Whakar
Ka whakarōpūhia nga reera rerehua kia rite ki te hanganga, hononga paipa, pereti, aha atu.
Waea pūrerehua Kōpae Pokapū:
He hanganga kei runga te mata o te nohoanga kei waho o te papa takirere i runga i te mata kotahi ki te pokapū o te kakau takirere.
Ko te mata o roto o te tinana takirere kua mau ki te hanganga o te mowhiti nohoanga rapa.Ko te takirere tenei e tohuhia ana e te mea e kiia nei ko te pokapu pereti rapa pereti rewharewha.E ai ki te kopeketanga o te rapa, he pai te whakamahi i te kaha repulsive repulsive o te rewharewha purerehua me te mata o te nohoanga, kia pai ai te hiri nohoanga.
Rererererererere poka noa:
Ko te pokapū hurihanga (kakau) o te kōpae kei te pokapū o te diameter takirere, a ko te turanga o te kōpae he hanganga rereke.Ko te mowhiti nohoanga he rite ki te ahua rereke kotahi me te pai o te mahi hiri.
Takiwa pūrerehua takitoru:
He hangahanga e honoa ai te rerekee-rua, ka anga te pokapu o te pereti rerehua mai i te pokapu o te diameter o te waa o te waa.
Karekau te rerekee-toru e pa ki te mowhiti nohoanga whakarewa pereti i te wa e whakatuwherahia ana, ka kati ana te pereti rerehua, a ko te pereti rererereke anake e kaha te pehi i te mowhiti nohoanga hei takirere kati ina katia katoatia.
Wafer butterfly valve:
Ka whakamahia e te rewharewha angiangi nga raka hei hono i te takirere i waenga i nga kopa paipa e rua.E rua nga momo toronga, te momo lug full me te momo lug kare i oti.
Ka taea e taatau te whakahaere i enei paeraMiihini Motuhake Motuhake.
Wā tuku: Hūrae-01-2021