Ma valve a globeMa valve a globe akhala akuthandiza kwambiri pakulamulira madzi kwa zaka 200 ndipo tsopano akupezeka kulikonse. Komabe, m'mapulogalamu ena, mapangidwe a ma valve a globe angagwiritsidwenso ntchito poyang'anira kutsekedwa kwathunthu kwa madzi. Ma valve a globe nthawi zambiri amagwiritsidwa ntchito powongolera kuyenda kwa madzi. Ma valve a globe amayatsidwa/amazimitsidwa ndi kugwiritsidwa ntchito modulating kumatha kuwoneka kunja kwa nyumba ndi nyumba zamabizinesi, komwe ma valve nthawi zambiri amayikidwa.

Nthunzi ndi madzi zinali zofunika kwambiri pa kusintha kwa mafakitale, koma zinthu zoopsa izi zinafunika kuletsedwa.valavu yapadziko lonsendiye valavu yoyamba yofunikira kuti ntchitoyi ithe bwino. Kapangidwe ka valavu ya padziko lonse kanali kopambana komanso kokondedwa kwambiri kotero kuti kunapangitsa kuti ambiri mwa opanga mavalavu akale (Crane, Powell, Lunkenheimer, Chapman, ndi Jenkins) alandire ma patent awo oyamba.

Ma valve a chipataAmagwiritsidwa ntchito m'malo otseguka kapena otsekedwa kwathunthu, pomwe ma valve ozungulira angagwiritsidwe ntchito ngati ma valve otseka kapena odzipatula koma apangidwa kuti azitseguka pang'ono kuti azilamulira kuyenda kwa madzi akamawongolera. Muyenera kusamala posankha mapangidwe pogwiritsa ntchito ma valve ozungulira pama valve oyendetsedwa ndi odzipatula komanso otsekedwa, chifukwa zimakhala zovuta kusunga chitseko cholimba ndi kukankhira kwambiri pa disc. Mphamvu ya madzi ithandiza kupeza chitseko chabwino ndikupangitsa kuti zikhale zosavuta kutseka madzi akamayenda kuchokera pamwamba kupita pansi.

Ma valve a globe ndi abwino kwambiri pa ntchito za ma valve owongolera chifukwa cha ntchito yake yowongolera, zomwe zimathandiza kuti pakhale njira yabwino kwambiri yowongolera ndi ma positioner ndi ma actuator olumikizidwa ku globe valve bonnet ndi stem. Amagwira ntchito bwino kwambiri pa ntchito zingapo zowongolera madzi ndipo m'mapulogalamu awa amatchedwa "Final Control Elements."

njira yoyenda yosalunjika

Globe imadziwikanso kuti valavu yozungulira chifukwa cha mawonekedwe ake ozungulira, omwe amabisabe mawonekedwe osazolowereka komanso osokonezeka a njira yoyendamo. Popeza njira zake zapamwamba ndi zapansi zili ndi serpenti, valavu yozungulira yotseguka imawonetsabe kukangana kwakukulu kapena chotchinga cha kuyenda kwa madzi mosiyana ndi valavu yotseguka kwathunthu kapena ya mpira. Kukangana kwa madzi komwe kumachitika chifukwa cha kuyenda kopendekeka kumachedwetsa kudutsa mu valavu.

Choyezera kuyenda kwa madzi, kapena "Cv," cha valavu chimagwiritsidwa ntchito kuwerengera kuyenda kwa madzi kudzera mmenemo. Mavalavu a pachipata amakhala ndi kukana kochepa kwambiri kuyenda kwa madzi akakhala pamalo otseguka, motero Cv idzakhala yosiyana kwambiri pa valavu ya pachipata ndi valavu yozungulira ya kukula kofanana.

Disiki kapena pulagi, yomwe imagwira ntchito ngati njira yotsekera ma globe valve, imatha kupangidwa m'mitundu yosiyanasiyana. Kuthamanga kwa madzi kudzera mu valavu kumatha kusintha kwambiri kutengera kuchuluka kwa ma spins a tsinde pamene valavu yatsegulidwa mwa kusintha mawonekedwe a diski. Kapangidwe ka diski yokhotakhota kapena "yachikhalidwe" imagwiritsidwa ntchito m'magwiritsidwe ambiri chifukwa ndi yoyenera kuposa mapangidwe ena pa kayendedwe kake (kuzungulira) kwa tsinde la valavu. Ma diski a V-port ndi oyenera kukula konse kwa ma globe valve ndipo amapangidwira kuchepetsa kuyenda bwino kwa madzi m'magawo osiyanasiyana otseguka. Cholinga cha mitundu ya singano ndi kulamulira kwathunthu, komabe nthawi zambiri amaperekedwa m'ma diameter ang'onoang'ono okha. Choyika chofewa komanso cholimba chingayikidwe mu diski kapena mpando pamene kutsekedwa kwathunthu kukufunika.

Chokongoletsera cha valavu ya globe

Kutsekeka kwenikweni kwa chigawo chimodzi mu valavu ya globe kumaperekedwa ndi spool. Mpando, diski, tsinde, mpando wakumbuyo, ndipo nthawi zina zida zomwe zimamangirira tsinde ku diski zimapanga trim ya globe valve. Kugwira ntchito bwino kwa valavu iliyonse komanso nthawi yake yogwira ntchito kumadalira kapangidwe ka trim ndi kusankha kwa zinthu, koma ma globe valves amakhala osatetezeka kwambiri chifukwa cha kukangana kwawo kwamadzimadzi komanso njira zovuta zoyendera. Liwiro lawo ndi kugwedezeka kwawo zimakwera pamene mpando ndi diski zikuyandikirana. Chifukwa cha kuwonongeka kwa madzi ndi liwiro lowonjezeka, n'zotheka kuwononga trim ya valavu, zomwe zidzawonjezera kwambiri kutuluka kwa valavu ikatsekedwa. Stringing ndi mawu a cholakwika chomwe nthawi zina chimawoneka ngati tinthu tating'onoting'ono pampando kapena diski. Chomwe chinayamba ngati njira yaying'ono yotulukira madzi chingakule ndikusanduka kutuluka kwakukulu ngati sichikonzedwa munthawi yake.

Pulagi ya mavavu ang'onoang'ono a bronze globe nthawi zambiri imapangidwa ndi chinthu chomwecho monga thupi, kapena nthawi zina cholimba ngati bronze. Zipangizo zodziwika bwino za mavavu a globe a chitsulo chopangidwa ndi bronze ndi bronze. IBBM, kapena "Iron Body, Bronze Mounting," ndi dzina la chokongoletsera chachitsulo ichi. Pali zipangizo zosiyanasiyana zokongoletsa mavavu achitsulo, koma nthawi zambiri chinthu chimodzi kapena zingapo zokongoletsa zimapangidwa ndi chitsulo chosapanga dzimbiri cha martensitic 400 series. Kuphatikiza apo, zipangizo zolimba monga stellite, zitsulo zosapanga dzimbiri za series 300, ndi zitsulo zamkuwa ndi nickel monga Monel zimagwiritsidwa ntchito.

Pali njira zitatu zofunika kwambiri zopangira ma valve a globe. Mawonekedwe a "T", omwe tsinde lake limazungulira pa payipi, ndi omwe amapezeka kwambiri.
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Mofanana ndi valavu ya T, valavu ya ngodya imazungulira kuyenda kwa madzi mkati mwa valavu madigiri 90, ikugwira ntchito ngati chipangizo chowongolera kuyenda kwa madzi komanso ngati chigongono cha chitoliro cha madigiri 90. Pa "mitengo ya Khirisimasi" ya mafuta ndi gasi, mavalavu a ngodya ndi mtundu wa valavu yowongolera kutulutsa komaliza yomwe imagwiritsidwabe ntchito nthawi zambiri pamwamba pa ma boiler.
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Kapangidwe ka “Y”, komwe ndi kapangidwe kachitatu, cholinga chake ndi kulimbitsa kapangidwe ka ntchito zoyatsira/kuzima pomwe kumachepetsa kuyenda kwa madzi komwe kumachitika m'thupi la valavu ya padziko lonse. Bonnet, tsinde, ndi disc ya valavu yamtundu uwu ya padziko lonse lapansi zimayikidwa pa ngodya ya madigiri 30-45 kuti njira yoyendera ikhale yowongoka komanso kuchepetsa kukangana kwa madzi. Chifukwa cha kukangana kochepa, valavuyo sichitha kuwonongeka kwambiri ndipo machitidwe onse a dongosolo la mapaipi amawongoleredwa.