Intoki zumupira wamaboko, ikinyugunyugu na plaque ni ubwoko bumwe bwa valve. Itandukaniro nuko igice cyo gufunga umupira wumupira ari umupira, uzunguruka kumurongo wo hagati wumubiri wa valve kugirango ugere gufungura no gufunga. Umupira wumupira ukoreshwa cyane cyane mugukata, gukwirakwiza no guhindura icyerekezo cyogutwara imiyoboro. Ibice bitatu byumupira wumupira nubwoko bushya bwa valve yakoreshejwe cyane mumyaka yashize. Ubu bwoko bwa valve bugomba gushyirwaho muburyo butambitse.

Isosiyete ya NSW valve intoki ireremba umupira wa valve intebe ifite imikorere myiza yo gufunga. Impeta yo gufunga umupira wumupira ahanini ikozwe mubikoresho byoroshye nka PTFE (RPTFE, NYLON, DEVLON, PEEK nibindi). Imiterere yoroshye yo gufunga byoroshye kwemeza kashe, kandi uko umuvuduko wo hagati wiyongera, imbaraga zo gufunga umupira wiyongera. Ikirangantego cy'uruti ni iyo kwizerwa. Iyo umupira wumupira ufunguye ugafungwa, uruti rwa valve ruzunguruka gusa kandi ntiruzamuka hejuru. Ikirangantego cyo gupakira kashe nticyoroshye kwangirika. Imbaraga zifunga kashe ya valve igaruka kashe yiyongera hamwe no kwiyongera k'umuvuduko wo hagati. Kuberako PTFE nibindi bikoresho bifite ibintu byiza byo kwisiga, kwangirika kwumupira hamwe numupira wumupira ni muto, kandi umupira wumupira ufite ubuzima burebure. Moderi yingirakamaro irashobora kuba ifite pneumatike, amashanyarazi, hydraulic nubundi buryo bwo gutwara kugirango tumenye kure kandi bikore. Umuyoboro wumupira wumupira uroroshye kandi urashobora gutwara ibintu byamazi, ibishishwa hamwe nuduce twinshi.

Intoki ireremba umupira wa valve ni ubwoko bwa valve yasohotse muri 1950. Mugice cyakinyejana, umupira wumupira wateye imbere mubyiciro byingenzi bya valve. Umupira wumupira ukoreshwa cyane cyane guca cyangwa guhuza imiyoboro, kandi urashobora no gukoreshwa muguhindura amazi no kugenzura. Segment ball valve (V notch ball valve) irashobora gukora neza neza kugenzura no kugenzura neza, kandi imipira yinzira eshatu ikoreshwa mugukwirakwiza imiyoboro no guhindura icyerekezo cyerekezo. Intoki zintoki zitwa amazina ahanini zishingiye kuburyo bwo gutwara umupira wumupira uhinduranya uruziga cyangwa ikiganza.