Uma kuqhathaniswa nei-valve yesango, i-globe valve kanye nomklamo we-valve wokuhlola, umlando we-valve yebhola mfushane kakhulu. Nakuba i-patent yokuqala ye-valve yebhola yakhishwa ngo-1871, kuzothatha iminyaka engu-85 ukuze i-valve yebhola ibe yimpumelelo kwezohwebo. I-Polytetrafluoroethylene (PTFE, noma “Teflon”) yatholwa phakathi nenqubo yokuklama ibhomu le-athomu phakathi neMpi Yezwe II, ezoba ngumsunguli wokuqala imboni yamavalvu ebhola. Ama-valve amabhola atholakala kuzo zonke izinto kusuka ethusi kuya ensimbi ye-carbon nensimbi engagqwali kuya ku-zirconium.

Kunezinhlobo ezimbili eziyisisekelo: amabhola antantayo namabhola e-trunnion. Le miklamo emibili ivumela ukwakhiwa kwamavalvu ebhola asebenzayo ukusuka ku-¼” ukuya ku-60” nangaphezulu. Ngokuvamile, umklamo ontantayo usetshenziselwa ama-valve amancane naphansi okucindezela, kuyilapho uhlobo lwe-trunnion lusetshenziselwa izinhlelo zokusebenza ze-valve ezinkulu neziphezulu.

I-VM SUM21 BALL API 6Di-valve yebholaIvalvu yebhola ye-API 6D isebenzisa lezi zinhlobo ezimbili zamavalvu ebhola ngenxa yezindlela zawo zokuvala nokuthi amandla oketshezi ageleza kanjani esuka epayipini eya ebholeni abese esabalalisa esihlalweni sevalvu. Emklamo webhola elintantayo, ibhola lilingana ngokuqinile phakathi kwezihlalo ezimbili, esisodwa phezulu nomfula nesinye esingezansi. Amandla oketshezi asebenza ebholeni, aliphushele esihlalweni sevalvu etholakala kumzimba we-valve eyehla nomfula. Njengoba ibhola livala imbobo yonke yokugeleza, wonke amandla okugeleza aphusha ibhola ukuze aliphoqe esihlalweni sevalvu. Uma ibhola likhulu kakhulu futhi ingcindezi inkulu kakhulu, amandla esihlalweni se-valve azoba mkhulu, ngoba i-torque yokusebenza inkulu kakhulu futhi i-valve ayikwazi ukusebenza.

Ama-valve ebhola antantayo anezinhlobonhlobo zezitayela zomzimba, kodwa ethandwa kakhulu uhlobo lokungena oluneziqephu ezimbili. Ezinye izitayela zomzimba zifaka izingcezu ezintathu nokungena okuphezulu. Amavalvu ebhola antantayo akhiqizwa ngosayizi afika ku-24″ kanye namamaki angu-300, kodwa uhla lwangempela lokusetshenziswa lwamavalvu ebhola antantayo ngokuvamile luphansi kakhulu-umkhawulo ophezulu cishe u-12″.

Nakuba ama-valve ebhola aklanywe ngokuyinhloko njengama-valve okuvula/avaliwe noma “okumisa”, ukwengezwa kwamanye ama-valve ebhola kanye ne-V-port.i-valve yebholaimiklamo izenza zilungele izinhlelo zokusebenza ezilawulwayo.

Isihlalo se-elastic
I-VM SUM21 IBHOLA I-Flanged Ball Valve I-valve yebhola ene-flanged Ama-valve amabhola antantayo amancane angasetshenziswa ezinhlelweni eziningi ezahlukene, kusukela emapayipini asendlini kuya kumapayipi anamakhemikhali adingeka kakhulu. Izinto ezihlala zidume kakhulu kulawa mavalvu wuhlobo oluthile lwe-thermoplastic, njenge-PTFE. Izihlalo zamavalvu e-Teflon zisebenza kahle ngoba zithambe ngokwanele ukuthi zingavala kahle kumabhola ensimbi aphucuziwe, kodwa ziqine ngokwanele ukuthi zingaphumi kuvalvu. Izinkinga ezimbili eziyinhloko ngala mavalvu ezihlalo ezithambile ukuthi aklwebheka kalula (futhi angase avuze), futhi izinga lokushisa lilinganiselwe ngaphansi kwendawo encibilikayo yesihlalo se-thermoplastic-azungeze u-450oF (232oC), kuye ngokuthi isihlalo sinjani.

Isici samavalvu ebhola antantayo amaningi anwebekayo ukuthi angavalwa kahle uma kuba nomlilo obangela ukuba isihlalo esikhulu sincibilike. Lokhu kubizwa ngokuthi umklamo ongashi; inesikhwama sesihlalo esingagcini nje ngokubamba isihlalo esinwebekayo endaweni, kodwa futhi inikeza indawo yokuhlala yensimbi ehlinzeka ngophawu oluyingxenye lapho ihlangana nebhola. Ngokusho kwe-American Petroleum Institute (API) 607 noma i-6FA amazinga okuhlola umlilo, i-valve ihlolwe ukuze kuqinisekiswe umklamo wokuvikela umlilo.

Idizayini ye-Trunnion
I-VM SUM21 BALL API 6D trunnion ball valve API 6D trunnion ball valve Uma kudingeka i-valve yebhola yosayizi omkhulu kanye nomfutho ophakeme, umklamo uphendukela ohlotsheni lwe-trunnion. Umehluko phakathi kwe-trunnion nohlobo oluntantayo ukuthi ibhola le-trunnion ligxilwe emzimbeni oyinhloko nge-trunnion engezansi (induku yokuxhuma emfushane) kanye nenduku ephezulu. Njengoba ibhola lingakwazi “ukuntanta” esihlalweni se-valve ukuze lifinyelele ukuvala ngempoqo, isihlalo se-valve kufanele sintante ebholeni. Idizayini yesihlalo se-trunnion ibangela ukuthi isihlalo sivuswe umfutho okhuphuka nomfula futhi siphoqelelwe ku-sphere ukuze sivalwe. Ngenxa yokuthi ibhola limiswe ngokuqinile endaweni, ngaphandle kokuzungezisa kwalo okungu-90o, amandla oketshezi angavamile nokucindezela ngeke kugxumezele ibhola esihlalweni sevalvu. Kunalokho, amandla asebenza kuphela endaweni encane ngaphandle kwesihlalo esintantayo.

I-VM SUM21 BALL Qeda idizayini ye-inlet I-valve yebhola ye-trunnion yomklamo wokungena ekugcineni ingumfowabo omkhulu onamandla we-valve yebhola elintantayo, ngakho ingakwazi ukuphatha imisebenzi emikhulu-ukucindezela okuphezulu namadayimitha amapayipi amakhulu. Kuze kube manje, ukusetshenziswa okudume kakhulu kwama-valve ebhola e-trunnion kusezinsizakalweni zamapayipi.