Valavu yozungulira ikugwira ntchito, mitundu yonse ya ziwalo za vavu iyenera kukhala yokwanira komanso yokhazikika. Mabotolo pa flange ndi bulaketi ndi ofunikira kwambiri. Ulusi uyenera kukhala wokhazikika ndipo palibe kumasuka komwe kumaloledwa. Nati yomangirira pa gudumu lamanja, ngati yapezeka yomasuka iyenera kumangidwa pakapita nthawi, kuti isavulaze kulumikizana kapena kutaya gudumu lamanja ndi dzina. Ngati gudumu lamanja la valavu yozungulira latayika, sipanala yosinthika siloledwa kugwiritsidwa ntchito m'malo mwake ndipo iyenera kukhala ndi zida pakapita nthawi. Chogwirira chonyamulira sichiloledwa kupotoka kapena kukhala ndi malo osungiramo katundu. Chophimba choteteza chiyenera kuyikidwa pa tsinde la valavu yozungulira pamalo omwe amaipitsidwa mosavuta ndi mvula, chipale chofewa, fumbi, mchenga ndi dothi lina. Choyezera pa valavu yozungulira chiyenera kukhala chokwanira, cholondola komanso chowonekera bwino. Chisindikizo, chivundikiro ndi zowonjezera za valavu yozungulira ziyenera kukhala zokwanira komanso zokhazikika. Musagwedeze, kuyima kapena kuchirikiza zinthu zolemera pa valavu yozungulira ikugwira ntchito; Ma valve osakhala achitsulo ndi valavu yachitsulo choponyedwa, makamaka, zambiri zidzayimitsa ntchito yokonza popanga zowotcherera popanga ma valve asanayambe komanso atamaliza kukonza, chifukwa valavu yogwira ntchito yopanga imagwira ntchito yofunika kwambiri, kukonza mwadongosolo komanso moyenera kudzateteza valavu yoyenera, valavu kuti igwire ntchito bwino, ndikuwonjezera moyo wa valavu. Kukonza ma valve kungawoneke kosavuta, koma sikophweka. Nthawi zambiri pamakhala mbali zina za ntchito zomwe sizikuganiziridwa.
Choyamba, pamene valavu ya globe ikudzola mafuta, vuto la kulowetsa mafuta nthawi zambiri limanyalanyazidwa. Pambuyo podzaza mafuta, wogwiritsa ntchito amasankha njira yolumikizira valavu ndi mafuta ndipo amachita ntchito yodzaza mafuta. Pali zochitika ziwiri: mbali imodzi, kuchuluka kwa mafuta omwe amalowetsedwa kumakhala kochepa, ndipo pamwamba pake pamavalidwa mwachangu chifukwa chosowa mafuta. Kumbali ina, kulowetsa mafuta mopitirira muyeso, zomwe zimapangitsa kuti pakhale zinyalala. Palibe kuwerengera kolondola kwa mphamvu yotsekera ya mavalavu osiyanasiyana a globe malinga ndi mtundu ndi gulu la mavalavu. Mphamvu yotsekera ikhoza kuwerengedwa ndi kukula ndi gulu la valavu yodulidwa, kenako mafuta okwanira amalowetsedwa.
Chachiwiri, vuto la kuthamanga kwa magazi nthawi zambiri limanyalanyazidwa pamene valavu ya padziko lonse ikudzola mafuta. Pa nthawi yogwiritsira ntchito mafuta, kuthamanga kwa magazi kumasintha nthawi zonse ndi zigwa ndi mapiri. Kupanikizika kumakhala kotsika kwambiri, chisindikizo chimatuluka kapena kulephera, kuthamanga kwa magazi kumakhala kwakukulu kwambiri, pakamwa pa mafuta kumatsekedwa, mafuta omwe ali mu chisindikizo amalimba kapena mphete yotsekera imatsekedwa ndi mpira wa valavu ndi mbale ya valavu. Nthawi zambiri, kuthamanga kwa mafuta kumakhala kotsika kwambiri, mafuta omwe amalowetsedwa amalowa pansi pa chipinda cha valavu, zomwe nthawi zambiri zimachitika m'ma valve ang'onoang'ono onunkhira. Ndipo kuthamanga kwa mafuta kumakhala kokwera kwambiri, kumbali imodzi, yang'anani nozzle ya mafuta, ndikuyiyikanso ngati dzenje lamafuta latsekedwa; Kumbali inayi ndi kuuma kwa lipid, kuti mugwiritse ntchito madzi oyeretsera, mobwerezabwereza kufewetsa kulephera kwa mafuta otsekera, ndikulowetsa mafuta atsopano m'malo mwake. Kuphatikiza apo, mtundu wotsekera ndi zinthu zotsekera zimakhudzanso kuthamanga kwa mafuta. Mitundu yosiyanasiyana yotsekera imakhala ndi kuthamanga kwa mafuta kosiyana. Kawirikawiri, kuthamanga kwa mafuta kwa chisindikizo cholimba kumakhala kokwera kuposa kwa chisindikizo chofewa. Kusamalira kuwerenga kwa mpira nthawi zambiri kumakhala kotseguka, zochitika zapadera zimasankha kutseka kukonza. Ma valve ena sangakhale onse kuti atsegule malo. Vavu ya chipata iyenera kutsekedwa panthawi yokonza kuti mafuta adzazidwe ndi mpata wotsekera womwe uli pafupi ndi mphete yotsekera. Ngati yatsegulidwa, mafuta otsekera adzagwera mwachindunji mu ngalande yoyendera madzi kapena chipinda cha valavu, zomwe zimayambitsa zinyalala.

Pambuyo poyika, valavu yozungulira iyenera kuyang'aniridwa nthawi zonse. Zinthu zazikulu zowunikira ndi izi:
(1) kuwonongeka kwa pamwamba pa valavu yozungulira.
(2) Kuwonongeka kwa ulusi wa trapezoidal wa tsinde ndi tsinde.
(3) Kaya kulongedzako kwatha ntchito ndipo sikuli koyenera. Ngati kwawonongeka, kuyenera kusinthidwa pakapita nthawi.
(4) pambuyo pa kukonzanso ndi kusonkhanitsa valavu ya globe, mayeso otsekera ayenera kuchitika.

Nortech ndi m'modzi mwa opanga ma valve otsogola ku China omwe ali ndi satifiketi ya ISO9001 yapamwamba.

Zinthu zazikulu:Valavu ya Gulugufe,Valavu ya Mpira,Valavu ya Chipata,Valavu Yowunikira,Globe Vavlve,Zipangizo za Y,Chotsukira Magetsi,Zipangizo zoyezera mpweya (Pneumatic Acurators).