Thevalavu ya mpiraidatuluka mu 1950s.Ndi chitukuko chachangu cha sayansi ndi luso, mosalekeza patsogolo luso kupanga ndi kapangidwe mankhwala, mu zaka 40, izo mofulumira anayamba gulu lalikulu valavu.M'mayiko otukuka akumadzulo, kugwiritsa ntchito ma valve a mpira kukuwonjezeka chaka ndi chaka.
Mavavu mpira chimagwiritsidwa ntchito kuyenga mafuta, mapaipi mtunda wautali, makampani mankhwala, papermaking, mankhwala, conservancy madzi, mphamvu yamagetsi, kasamalidwe tauni, zitsulo ndi mafakitale ena, ndi kutenga udindo wofunika kwambiri mu chuma dziko.Imakhala ndi zochita zozungulira madigiri 90, thupi la tambala ndi gawo, lokhala ndi zozungulira kudzera mu dzenje kapena njira yodutsa mu olamulira ake.
Valavu ya mpira imagwiritsidwa ntchito makamaka kudula, kugawa ndikusintha njira yoyendetsera sing'anga mu payipi.Zimangofunika kuzungulira madigiri 90 ndipo torque yaying'ono imatha kutsekedwa mwamphamvu.Valavu ya mpira ndiyoyenera kwambiri kugwiritsidwa ntchito ngati chosinthira ndi chotsekera, valavu yampira yooneka ngati V.Kuphatikiza pa kulabadira magawo a mapaipi, ma valve amagetsi ayeneranso kusamala kwambiri za chilengedwe chomwe amagwiritsidwa ntchito.Popeza chipangizo chamagetsi mu valve yamagetsi ndi chipangizo cha electromechanical, momwe ntchito yake imagwiritsidwira ntchito imakhudzidwa kwambiri ndi malo ake ogwiritsira ntchito.Pazikhalidwe zabwinobwino, chidwi chapadera chiyenera kuperekedwa pakugwiritsa ntchito mavavu amagetsi amagetsi ndi ma valve agulugufe m'malo otsatirawa.
Gulu la ntchito
1. Valavu yodutsa: Valavu ya mpira nthawi zambiri imatsegulidwa ndi madzi osasunthika, kotero kuti valve yodutsa imayikidwa kuti ikanikizidwe poyamba, ndiko kuti, mbali zonse ziwiri zimadzazidwa ndi madzi;
2. Valve ya mpweya: podzaza madzi, buoy idzatseka valavu pamene mpweya ukuchotsedwa;pakukhetsa, buoy imatsitsidwa yokha ikagwiritsidwa ntchito powonjezera mpweya;
3. Valavu yothandizira kupanikizika: potsegula ndi kutseka valavu, chotsani madzi othamanga pakati pa valve ndi chivundikiro chosindikizira kuti musavale chophimba chosindikizira;
4. Valavu yonyansa: kukhetsa zimbudzi m'munsi mwa chipolopolo cha mpira.
Kagawidwe ka HIV
1. Vavu ya mpira wa pneumatic
2. Valve yamagetsi yamagetsi
3. Vavu ya mpira wa Hydraulic
4. Pneumatic hydraulic mpira valve
5. Electro-hydraulic mpira valve
6. Valavu ya mpira wa turbine
