Chitsulo Chosapanga Dzimbiri Chokhazikika ...
Kodi valavu ya mpira yokhala ndi malo olimba (Hard seat ball valve) ndi chiyani?
Valavu ya mpira ndi imodzi mwa mavavu otchuka kwambiri m'mafakitale osiyanasiyana. Ndi iziMawonekedweMonga kukana madzi pang'ono, njira yoyenda bwino, kutsegula ndi kutseka mwachangu, komanso kuwongolera kosavuta, valavu ya mpira yakhala ikugwiritsidwa ntchito kwambiri. Koma mavalavu a mpando kapena a mpira wamba nthawi zambiri amapangidwa ndi PTFE ndi zinthu zina zosakhala zachitsulo. Zochepa chifukwa cha zida zosindikizira mipando, mavalavu wamba sangagwiritsidwe ntchito chifukwa cha kutentha kwambiri kapena kukana kuvala.
Chifukwa chake, mndandanda wa machitidwe atsopano a kalembedwel Valavu ya mpira yokhala ndi mipando yolimba analindipoamagwiritsidwa ntchito kwambiri mu mafuta, makampani opanga mankhwala, magetsi, zitsulo, makampani opanga kuwala ndi zina zotero.
Zinthu zazikulu za valavu ya mpira yokhala ndi malo olimba (Hard seat ball valve)?
1. Advanced Ball ndi Seat Hardening Technology
Kutseka kumapangidwa ndi chitsulo pakati pa mpira ndi mpando wachitsulo wa mavavu a mpira. Malinga ndi momwe zinthu zilili komanso zofunikira za ogwiritsa ntchito, njira zosiyanasiyana zolimbitsira mpira ndi mipando zitha kugwiritsidwa ntchito, kuphatikiza chophimba cha HVOF, kuwotcherera kwa nickel-base alloy spray, kuwotcherera kwa high nickel alloy spray, kuwotcherera kwa cobalt case hard alloy spray, ndi zina zotero. Nthawi zambiri kuuma kwa mpira ndi mpando kumatha kufika HRC55-60 ndi mtengo wapamwamba wa HRC70. Ndipo nthawi zambiri, kukana kutentha kwa zinthu zotsekera nkhope kumatha kukhala 540°C, ndi mtengo wapamwamba wa 980°C. Zinthu zotsekera nkhope zimakhalanso ndi magwiridwe antchito abwino oteteza komanso oteteza kuvulala.
2. Kutsegula ndi Kutseka kwa Vavu Yosinthasintha
Popeza kutentha kwapamwamba kumagwira ntchito, mpira ndi mpando zidzakula kwambiri chifukwa cha kutentha, ndipo mphamvu ya magetsi idzawonjezeka ndipo valavu singathe kutsegulidwa. Valavu ya mpira imagwiritsa ntchito kasupe wa diski kapena kasupe wodzaza ndi masika kuti kutentha kwa ziwalo zomwe zili ndi kutentha kwakukulu kuzitha kuyamwa ndi kasupe wa diski kapena kasupe. Ndipo zimatsimikiziridwa kuti valavu idzatsegulidwa mosavuta ndi kutsekedwa kutentha kwambiri popanda kukula kwambiri.
4. Double Block ndi Bleed (Chitsulo Chokhala ndi Trunnion Ball Valve)
Valavu ya mpira yokhala ndi chitsulo nthawi zambiri imagwiritsa ntchito kapangidwe kotsekera mpirawo usanayambe. Valavu ikatsekedwa ndipo pakati pake patuluka valavu yotulutsira madzi, mipando yakumtunda ndi yakumunsi imatseka madziwo payokha pamalo olowera ndi potulukira kuti igwire ntchito ziwiri.
Valavu ya mpira yoyandama yokhala ndi chitsulo nthawi zambiri imagwiritsa ntchito kapangidwe kotsekera pambuyo pa mpirawo. Njira yoyendetsera madzi idzalembedwa pa thupi la vavu ya mpirawo mozungulira. Ngati ogwiritsa ntchito atsimikiza, kutsekera kwa mbali ziwiri kumatha kuchitika.
5. Kugwira Ntchito Kodalirika Kosindikiza
Ukadaulo wapadera wopera mpira umagwiritsidwa ntchito, kudzera mu kuzungulira kwa mpira ndi chopukusira pamalo osiyanasiyana. Malo a mpirawo adzakhala ozungulira komanso osalala kwambiri. Kutseka kwa mpando wa valavu kumabwera chifukwa cha kukakamizidwa kochepa kwa kasupe. Kuphatikiza apo, mphamvu ya pisitoni ya mpando wa valavu imapangidwa moyenera, zomwe zimapangitsa kuti kutsekedwa kwamphamvu kuchitike ndi madzi okha, kulimba kwa mavavu a mpira okhala ndi zitsulo kumakwaniritsa zofunikira za mulingo wachinayi wa ANSI B16.104.
Valavu ya mpira yokhala ndi mipando yolimba
Mafotokozedwe aukadaulo a valavu ya mpira yokhala ndi malo olimba?
Valavu ya mpira yokhala ndi mpando wolimba, kapangidwe kosiyana ka mpira woyandama ndi mpira wa trunnion.
Valavu ya mpira yokhala ndi mipando yolimba
Chiwonetsero cha Zamalonda: Valavu ya mpira yokhala ndi mipando yolimba
Kugwiritsa ntchito valavu ya mpira yokhala ndi mpando wolimba
TheValavu ya mpira yokhala ndi mipando yolimbaimagwiritsidwa ntchito kwambiri kudula kapena kulumikiza zolumikizira m'mapaipi osiyanasiyana, mafuta, makampani opanga mankhwala, magetsi, zitsulo, ndi makampani opanga magetsi. Ndi yoyenera pamavuto akulu ogwirira ntchito okhala ndi tinthu tating'onoting'ono tolimba, slurry, ufa wa malasha, cinder ndi zina zotero.
