Vavu ndi chipangizo chowongolera cha payipi yamadzimadzi.Ntchito yake yayikulu ndikulumikiza kapena kudula kufalikira kwa sing'anga yamapaipi, kusintha njira yoyendetsera sing'anga, kusintha kuthamanga ndi kuthamanga kwa sing'anga, ndiikani ma valve osiyanasiyana, akuluakulu ndi ang'onoang'ono, mu dongosolo.Chitsimikizo chofunikira cha ntchito yachibadwa ya chitoliro ndizida.
Pali mitundu ingapo yodziwika bwino yamavavu ochizira madzi:
1. Vavu ya Chipata.
Ndiwo valavu yomwe imagwiritsidwa ntchito kwambiri potsegula ndi kutseka, yomwe imagwiritsa ntchito chipata (gawo lotsegulira ndi kutseka, mu valve yachipata, gawo lotsegula ndi lotseka limatchedwa chipata, ndipo mpando wa valve umatchedwa mpando wachipata) kuti ugwirizane ( tsegulani kwathunthu) Ndi kudula (kutseka kwathunthu) sing'anga mu payipi.Sizololedwa kugwiritsidwa ntchito ngati throttling, ndipo chipata chiyenera kupewedwa kuti chitsegulidwe pang'ono panthawi yogwiritsira ntchito, chifukwa kuwonongeka kwa sing'anga yothamanga kwambiri idzafulumizitsa kuwonongeka kwa malo osindikizira.Chipata chimayenda mmwamba ndi pansi pa ndege perpendicular kwa pakati pa njira ya mpando pachipata, ndi kudula sing'anga mu payipi ngati chipata, choncho amatchedwa valavu pachipata.
Mawonekedwe:
1.Kukana kuyenda kochepa.Njira yapakatikati mkati mwa thupi la valve ndiyolunjika, sing'anga imayenda molunjika, ndipo kukana koyenda kumakhala kochepa.
2.Ndizosapulumutsa ntchito potsegula ndi kutseka.Zimagwirizana ndi valavu yofananira, chifukwa ndi yotseguka kapena yotsekedwa, kayendetsedwe ka kayendetsedwe ka chipata ndi perpendicular kwa kayendedwe ka kayendedwe ka sing'anga.
3.Kutalika kwakukulu ndi nthawi yayitali yotsegula ndi kutseka.Kutsegula ndi kutseka kwa chipata kumawonjezeka, ndipo kuchepetsa liwiro kumachitika kudzera pa screw.
4. Chodabwitsa cha nyundo yamadzi sichophweka kuchitika.Chifukwa chake ndikuti nthawi yotseka ndi yayitali.
5. Sing'anga imatha kuyenda mbali iliyonse ya mpope, ndipo kuyikako ndikosavuta.Pampu yamadzi yolowera pachipata cha valve ndiyofunika kwambiri.
6. Kutalika kwapangidwe (mtunda wa pakati pa nkhope ziwiri zolumikiza kumapeto kwa chipolopolo) ndi yochepa.
7. Kusindikiza pamwamba kumakhala kosavuta kuvala.Pamene kutsegula ndi kutseka kumakhudzidwa, malo awiri osindikizira a mbale ya pachipata ndi mpando wa valve udzagwedeza ndi kusuntha wina ndi mzake.Pansi pa mphamvu yapakatikati, ndizosavuta kuyambitsa abrasion ndi kuvala, zomwe zimakhudza ntchito yosindikiza komanso moyo wonse wautumiki.
8. Mtengo wake ndi wokwera mtengo.Chizindikiro chosindikizira cholumikizira chimakhala chovuta kwambiri kuti chikonze, makamaka malo osindikizira pampando wa pachipata sikophweka kukonza.
2. Globe Valve
Valve yapadziko lonse lapansi ndi valavu yotsekeka yomwe imagwiritsa ntchito diski (gawo lotsekera la valavu yapadziko lonse lapansi limatchedwa disc) kuti liyendetse pakati pa mzere wa mpando wa disc (mpando wa valve) kuwongolera kutsegula ndi kutseka kwa payipi.Mavavu apadziko lonse lapansi nthawi zambiri ndi oyenera kunyamula zinthu zamadzimadzi ndi mpweya pansi pa zovuta zosiyanasiyana komanso kutentha mkati mwazomwe zatchulidwazi, koma sizoyenera kunyamula zakumwa zomwe zimakhala ndi mvula yolimba kapena crystallization.Mu mapaipi otsika kwambiri, valavu yoyimitsa imatha kugwiritsidwanso ntchito kusintha kayendedwe ka sing'anga mu payipi.Chifukwa cha zoperewera zamapangidwe, valavu yapadziko lonse lapansi ndi yochepera 250mm.Ngati ili papaipi yokhala ndi kuthamanga kwapakati komanso kuthamanga kwambiri, malo ake osindikizira amatha kuwonongeka mwachangu.Choncho, pamene mlingo wothamanga uyenera kusinthidwa, valve throttle iyenera kugwiritsidwa ntchito.
Mawonekedwe:
1.Kuvala ndi kuphulika kwa malo osindikizira sikuli kwakukulu, kotero ntchitoyo ndi yodalirika kwambiri ndipo moyo wautumiki ndi wautali.
2. Malo a malo osindikizira ndi ang'onoang'ono, mapangidwe ake ndi ophweka, ndipo maola a anthu omwe amafunikira kuti apange malo osindikizira ndi zinthu zamtengo wapatali zomwe zimafunikira mphete yosindikizira ndizocheperapo kuposa za valve yachipata.
3. Potsegula ndi kutseka, kugunda kwa diski kumakhala kochepa, kotero kutalika kwa valve yoyimitsa kumakhala kochepa.Zosavuta kugwiritsa ntchito.
4. Pogwiritsa ntchito ulusi kusuntha diski, sipadzakhala kutseguka ndi kutseka mwadzidzidzi, ndipo chodabwitsa cha "nyundo yamadzi" sichidzapezeka mosavuta.
5. Kutsegula ndi kutseka torque ndi kwakukulu, ndipo kutsegula ndi kutseka kumakhala kovuta.Potseka, kayendetsedwe ka kayendetsedwe ka disc ndi kosiyana ndi kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake.
6. Kukana kwakukulu kothamanga.Pakati pa mitundu yonse ya ma valve odulidwa, kukana kothamanga kwa valve yodulidwa ndiko kwakukulu kwambiri.(Njira yapakatikati ndiyovuta kwambiri)
7. Mapangidwewo ndi ovuta kwambiri.
8. Njira yolowera pakati ndi njira imodzi.Ziyenera kutsimikiziridwa kuti sing'anga imayenda kuchokera pansi kupita pamwamba, kotero sing'anga iyenera kuyenda mbali imodzi.
M'nkhani yotsatira, tidzakambirana za ma valve a butterfly ndi ma valve oyendera m'madzi opangira madzi, omwe amatha kale kulephera ndi kukonza.