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 mumwaka wa 1943. Ubu bwoko bwibikoresho bifite ibyiza byimbaraga zihagije kandi zogukomeretsa, elastoplastique zimwe na zimwe, ibintu byiza byo kwisiga hamwe no kurwanya ruswa, bikwiriye cyane nka a gufunga ibikoresho kandi bifite ingaruka zizewe 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 nibinyugunyugu bigenda bisimbuzwa buhoro buhoro imipira yumupira, kandi imipira yumupira ikoreshwa cyane, kuva kumurambararo muto kugeza kumurambararo munini, umuvuduko muke kugeza kumuvuduko mwinshi, ubushyuhe busanzwe nubushyuhe bwo hejuru, ubushyuhe bwinshi kugeza ku bushyuhe buke.Kugeza ubu, umurambararo ntarengwa wa valve wumupira wageze kuri Inch 60, kandi ubushyuhe bwo hasi burashobora kugera ku bushyuhe bwa hydrogène -254 ℃ .Ubushyuhe bwo hejuru bushobora kugera 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 wibibumbano bigizwe numubiri wingenzi wingenzi hamwe numubiri wa valve wungirije hamwe numupira wibice bitatu byumupira bigizwe numubiri umwe nyamukuru hamwe numubiri wimibiri ifasha.

Imipira yumupira irashobora gushyirwa mubice byoroheje bifunga imipira hamwe nu mupira ukomeye wo gufunga ukurikije 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 imipira ikomeye ni ibyuma.