Kugaragara kwumupira wumupira byari nyuma yintambara ya kabiri yisi yose.Nubwo kuvumbura umupira wumupira byatangiye mu kinyejana cya 20, iyi patenti yubatswe ntiyashoboye kurangiza ibikorwa byubucuruzi kubera imbogamizi mu nganda zikora ibikoresho n’inganda zitunganya imashini.DuPont muri Reta zunzubumwe zamerika yahimbye ibikoresho byinshi bya polymer polytetrafluoroethylene (PTFE) kugeza mu 1943. Ubu bwoko bwibikoresho bifite ibyiza byimbaraga zihagije kandi zogukomeretsa, elastoplastique imwe nimwe, ibintu byiza byo kwisiga hamwe no kurwanya ruswa, bikwiriye cyane nka a gufunga ibikoresho kandi bifite ingaruka zifatika cyane.Byongeye kandi, umupira ufite uruziga rurerure kandi urangije neza urashobora gukorwa nkumunyamuryango wo gufunga umupira wumupira kubera iterambere ryimashini zisya.Ubwoko bushya bwa valve ifite bore yuzuye na 90 ° kuzenguruka inguni yinjira mumasoko ya valve, bikurura abantu cyane.Ibicuruzwa bya gakondo gakondo nkibibuza guhagarara, amarembo y amarembo, ibyuma byacometse hamwe na kinyugunyugu bigenda bisimburwa buhoro buhoro n’imipira y’umupira, kandi imipira y’umupira ikoreshwa cyane, kuva kuri diametero ntoya kugeza kuri diameter nini, umuvuduko muke kugeza ku muvuduko mwinshi, ubushyuhe busanzwe kugeza ku bushyuhe bwinshi, ubushyuhe bwinshi kugeza ku bushyuhe buke.Kugeza ubu, diameter ntarengwa ya valve yumupira yageze kuri Inch 60, kandi ubushyuhe bwo hasi burashobora kugera kuri hydrogène yubushyuhe -254 ℃ .Ubushyuhe bwo hejuru burashobora kuva kuri 850 kugeza 900 ℃.Ibi byose bikora imipira yimipira ikwiranye nubwoko bwose bwitangazamakuru, bihinduka ubwoko bwizewe bwa valve.

Imipira yumupira irashobora kugabanywamo imipira ireremba hamwe na trunnion ball ball ishingiye kumiterere.

Imipira yumupira irashobora gushyirwa mubice byinjira hejuru yumupira wamaguru hamwe nu mpande zinjira kumupira.Kuruhande rwumupira winjira kuruhande urashobora kandi kugabanywamo igice kimwe cyumupira wumupira, ibice bibiri byumupira wamaguru hamwe nibice bitatu byumupira ukurikije imiterere yumubiri wa valve.Igice kimwe cyumupira wimibiri ya valve ni ntangarugero;ibice bibiri byumupira wumupira bigizwe numubiri wingenzi wingenzi hamwe numubiri wimfashanyo ya valve hamwe nibice bitatu byumupira wamaguru bigizwe numubiri umwe wingenzi hamwe numubiri wimibiri ifasha.

Imipira yumupira irashobora gushyirwa mubice byoroheje bifunga imipira yumupira hamwe nudukingirizo twa ball ball dukurikije ibikoresho bifunga kashe.Ibikoresho byo gufunga imipira yoroheje yumupira ni ibikoresho bya polymer byinshi nka polytetrafluoroethylene (PTFE), polytetrafluoroethylene ikomezwa na nylon kimwe na reberi.Gufunga ibikoresho byo gufunga umupira ukomeye ni ibyuma.