Vavu yamanja ya mpira, valavu ya butterfly ndi valavu ya pulagi ndi mtundu womwewo wa valavu. Kusiyanitsa ndikuti gawo lotseka la valve ya mpira ndi mpira, womwe umazungulira kuzungulira pakati pa thupi la valve kuti ukwaniritse kutsegula ndi kutseka. Valavu ya mpira imagwiritsidwa ntchito makamaka kudula, kugawa ndikusintha njira yoyendetsera sing'anga mu payipi. Valve yamagulu atatu ndi mtundu watsopano wa valve womwe wagwiritsidwa ntchito kwambiri m'zaka zaposachedwa. Vavu yamtunduwu nthawi zambiri iyenera kuyikidwa mopingasa mu payipi.

Mpando wa valve woyandama wa NSW valve umakhala ndi ntchito yabwino yosindikiza. Mphete yosindikiza ya valve ya mpira nthawi zambiri imapangidwa ndi zinthu zotanuka monga PTFE (RPTFE, NYLON, DEVLON, PEEK etc.). Kusindikiza kofewa kumakhala kosavuta kutsimikizira kusindikiza, ndipo pamene kuthamanga kwapakati kumawonjezeka, mphamvu yosindikiza ya valve ya mpira imawonjezeka. Chisindikizo cha tsinde ndi chodalirika. Pamene valavu ya mpira imatsegulidwa ndi kutsekedwa, tsinde la valve limangozungulira ndipo silisuntha mmwamba ndi pansi. Chisindikizo chonyamula tsinde la valve si chophweka kuti chiwonongeke. Mphamvu yosindikiza ya valve stem reverse seal imawonjezeka ndi kuwonjezeka kwapakatikati. Chifukwa PTFE ndi zipangizo zina zili ndi katundu wabwino wodzipangira okha, kuwonongeka kwa mikangano ndi mpira wa valve ndi kochepa, ndipo valavu ya mpira imakhala ndi moyo wautali wautumiki. Mtundu wogwiritsa ntchito ukhoza kukhala ndi ma pneumatic, magetsi, ma hydraulic ndi njira zina zoyendetsera kuti muzindikire kuwongolera kwakutali komanso kugwira ntchito modzidzimutsa. Njira ya valve ndi yosalala ndipo imatha kunyamula madzi a viscous, slurries ndi tinthu tolimba.

Vavu ya mpira woyandama pamanja ndi mtundu wa valavu yomwe idatuluka m'ma 1950. Mu theka la zaka, valavu ya mpira yakhala gulu lalikulu la valve. Valavu ya mpira imagwiritsidwa ntchito kwambiri podula kapena kulumikiza sing'anga, ndipo itha kugwiritsidwanso ntchito pakusintha kwamadzi ndi kuwongolera. Valve ya gawo la mpira (V notch ball valve) imatha kuwongolera bwino ndikuwongolera, ndipo valavu yamagulu atatu imagwiritsidwa ntchito kugawa sing'anga ndikusintha njira yoyenda yapakati. Mavavu a mpira wamanja amatchulidwa makamaka potengera momwe valavu ya mpira imayendera potembenuza gudumu lamanja kapena chogwirira.