Poyesa makina atsopano a mapaipi, mapaipi ndi ma valve amayesedwa koyambirira: mayesero awiri otuluka, 150% hydrostatic test ndi imodzi ya N2He (nitrogen, helium) yotuluka.Mayeserowa amaphimba osati ma flanges omwe amalumikiza valve ndi mapaipi, komanso mawonekedwe a bonnet ndi ma valve, komanso zigawo zonse za plug / spool mu thupi la valve.

Kuonetsetsa kuti phokoso mkati mwa chipata chofanana kapena valavu ya mpira ndikukakamizidwa mokwanira panthawi yoyesedwa, valve iyenera kukhala pa 50% yotseguka, monga momwe tawonetsera pa Chithunzi 1. Pakali pano zonse zikuwoneka kuti zikuyenda bwino, koma n'zothekadi kodi mavavu omwe amagwiritsidwa ntchito kwambiri padziko lonse lapansi ndi wedge gate?Ngati ma valve onse awiri ali otseguka monga momwe tawonetsera pa Chithunzi 2, kupanikizika kwa mtsempha kumagwira ntchito pazitsulo za valve.Kulongedza kwa spindle nthawi zambiri kumakhala zinthu za graphite.Pa 150% ya kukakamiza kwa mapangidwe, poyesa ndi mpweya wochepa wa ma molekyulu monga helium, nthawi zambiri zimakhala zofunikira kulimbitsa ma valve ophimba ma valve kuti apeze zotsatira zoyesa.

Vuto la opaleshoniyi, komabe, ndiloti likhoza kusokoneza kulongedza, zomwe zimapangitsa kuti zikhale zovuta kwambiri kuti zigwiritse ntchito valve.Pamene mikangano ikuwonjezeka, momwemonso kuchuluka kwa ntchito kumavala pazonyamula.

Ngati malo a valve palibe pampando wapamwamba wosindikizira, pali chizolowezi chokakamiza shaft ya valve kuti ipendeke pamene ikulimbitsa boneti.Kupendekeka kwa shaft ya valve kungayambitse kukanda chophimba cha valve panthawi yogwira ntchito ndikuyambitsa zizindikiro.

Ngati kusagwira bwino pakuyezetsa koyambirira kumapangitsa kuti pakhale kutayikira kwa shaft, ndizofala kulimbitsa boneti yokakamiza.Kuchita izi kungayambitse kuwonongeka kwakukulu kwa chivundikiro cha valve ndi / kapena ma bolts a gland.Chithunzi 4 ndi chitsanzo cha nthawi yomwe torque yochulukirapo imagwiritsidwa ntchito pa nati / bolt ya gland, zomwe zimapangitsa kuti chivundikiro cha valve yopanikizika chipindike ndi kupindika.Kupanikizika kwambiri pa boneti yokakamiza kumathanso kuchititsa kuti mabawuti aziduka.

Nati ya chivundikiro cha valve yokakamiza imamasulidwa kuti ichepetse kupanikizika kwa valve shaft kulongedza.Kuyesa koyambirira mumtunduwu kumatha kudziwa ngati pali vuto ndi tsinde ndi/kapena chisindikizo cha bonnet.Ngati chisindikizo chapamwamba sichigwira ntchito bwino, ganizirani kusintha valve.Pomaliza, mpando wosindikizira wapamwamba uyenera kukhala chisindikizo chotsimikizika chachitsulo mpaka chitsulo.

Pambuyo pakuyezetsa koyamba, ndikofunikira kuyika kupanikizika koyenera pakunyamula tsinde ndikuwonetsetsa kuti kulongedzako sikukuvutitsa tsinde.Mwanjira iyi, kuvala kwambiri kwa tsinde la valve kumatha kupewedwa, ndipo moyo wanthawi zonse wautumiki wonyamula ukhoza kusungidwa.Pali mfundo ziwiri zofunika kuzindikila: Choyamba, wothinikizidwa graphite kulongedza katundu sangabwerere ku boma pamaso psinjika ngakhale kupsyinjika kunja amatsitsidwa, kotero kutayikira zidzachitika pambuyo potsitsa kupsinjika maganizo.Chachiwiri, pomangirira kulongedza tsinde, onetsetsani kuti malo a valve ali pamalo a mpando wosindikizira wapamwamba.Kupanda kutero, kupanikizana kwa kulongedza kwa graphite kungakhale kosagwirizana, zomwe zimapangitsa kuti tsinde la valve likhale ndi chizolowezi chopendekera, zomwe zimapangitsa kuti pamwamba pa tsinde la valve kugwedezeke, ndipo tsinde la valve limatha kutulutsa kwambiri, ndipo valavu yotereyi iyenera kusinthidwa.