Mu malo ochitira masewera a Jinbin, ma valve asanu akuluakulu awiri ozungulira agulugufe ayang'aniridwa. Miyeso yawo ndi DN2200, ndipo matupi a ma valve amapangidwa ndi chitsulo chosungunuka. Valavu iliyonse ya gulugufe ili ndi choyendetsera magetsi. Pakadali pano, ma valve angapo awamavavu a gulugufezayang'aniridwa ndi kulandiridwa, ndipo zikuyembekezera kulongedza ndi kutumiza.

Mosiyana ndi ma valve a gulugufe achikhalidwe (komwe tsinde la valavu limagwirizana ndi pakati pa mbale ya gulugufe ndi thupi la valavu) kapena valavu ya gulugufe imodzi yosalala (komwe tsinde la valavu lokha ndilo limachoka pakati pa mbale ya gulugufe), ma valve a gulugufe awiri osalala amagwiritsa ntchito kapangidwe kawiri kosalala ka "mzere wa tsinde la valavu wochoka pakati pa mbale ya gulugufe + mzere wa tsinde la valavu wochoka pakati pa thupi la valavu".

Kapangidwe kameneka kamathandiza kuti mbale ya gulugufe ikhudze mpando wa valavu pokhapokha ngati yatsala pang'ono kutseka panthawi yotsegula ndi kutseka. Pa nthawi yonse yogwira ntchito, mbale ya gulugufe imalekanitsidwa kwathunthu ndi mpando wa valavu, zomwe zimachepetsa kwambiri kukangana ndi kuwonongeka kwa pamwamba potseka. Makamaka m'mikhalidwe yayikulu, imatha kupewa "kukangana kolimba" pamwamba potseka komwe kumachitika chifukwa cha kulemera kwa mbale ya gulugufe kapena kupanikizika kwapakati, zomwe zimapangitsa kuti moyo wa awiriwa ukhale wautali, womwe nthawi zambiri umakhala wautali kuposa 30% kuposa mavavu a gulugufe achitsulo chimodzi.

Mbale ya gulugufe ya valavu yamagetsi ya gulugufe yayikulu imapangidwa mwaluso. Ikatsegulidwa bwino, mbale ya gulugufe imakhala ndi malo ocheperako otsekereza pakati komanso mphamvu yotsika yokana kuyenda kwa madzi, zomwe zimachepetsa kutayika kwa mphamvu ya dongosolo la mapaipi. Pa mapaipi akuluakulu okhala ndi mainchesi a DN1000 kapena kuposerapo (monga mizere yamadzi am'mizinda ndi makina oyendera madzi amagetsi), mphamvu yogwiritsira ntchito pampu yasungidwa kwambiri.

Zinthu zogwirira ntchito za valavu zimatha kusankhidwa kuchokera ku chitsulo chosungunuka (cha madzi a m'boma), chitsulo cha kaboni (cha mafuta a mafakitale), kapena chitsulo chosapanga dzimbiri (cha zinthu zowononga) kutengera mawonekedwe a chinthucho. Pamwamba pa mbale ya gulugufe pakhoza kulumikizidwa ndi spray-welded ndi wosanjikiza wosawonongeka (monga tungsten carbide), womwe ungathe kupirira kuwonongeka kwa zinthu zomwe zili ndi tinthu tating'onoting'ono (monga mchenga ndi slag). Ponyamula madzi okhala ndi zinyalala monga zimbudzi ndi phulusa, nthawi yake yogwira ntchito ndi nthawi ziwiri kapena zitatu kuposa ma valavu wamba a gulugufe.

Chimake chachikuluvalavu ya gulugufe iwiri yosiyanaKudzera mu luso la kapangidwe ka zinthu, yakhazikitsa njira yowongolera kayendedwe ka madzi, kutseka magwiridwe antchito komanso nthawi yogwirira ntchito mapaipi akuluakulu. Yakhala njira yabwino kwambiri yosinthira ma valve achikhalidwe a zipata ndi ma valve a mpira m'makina oyenda bwino komanso ovuta m'maboma, magetsi, kusungira madzi, mafakitale ndi madera ena. Ndi yoyenera makamaka pazochitika zogwirira ntchito kwa nthawi yayitali zomwe zimakhudzidwa ndi kugwiritsa ntchito mphamvu ndi ndalama zokonzera.