Mohlala oa pele o tšoanang le oabelofo ea boloke valve e nang le patenteng ea John Warren ka 1871. Ke valve e lutseng ea tšepe e nang le bolo ea koporo le setulo sa koporo.Qetellong Warren o ile a fa John Chapman, hlooho ea Chapman Valve patent ea hae ea moralo.Ho sa tsotellehe hore na lebaka ke lefe, Chapman ha ho mohla a kileng a kenya moralo oa Warren tlhahisong.Ho e-na le hoo, eena le baetsi ba bang ba li-valve ba 'nile ba sebelisa meralo ea khale ka lilemo tse ngata.

Li-valve tsa bolo, tse tsejoang hape e le li-ball cock valves, li ile tsa qetella li nkile karolo nakong ea Ntoa ea II ea Lefatše.Nakong ena, baenjiniere ba e ntlafalitse bakeng sa ho sebelisoa lits'ebetsong tsa mafura a lifofane tsa sesole.Ka mor'a katleho eali-valve tsa boloNtoeng ea II ea Lefatše, baenjiniere ba ile ba sebelisa li-valve tsa bolo ho sebelisoa indastering.

E 'ngoe ea liphetoho tsa bohlokoa ka ho fetisisa tse amanang le li-valve tsa bolo lilemong tsa bo-1950 e ne e le nts'etsopele ea Teflon le tšebeliso ea eona e latelang e le lisebelisoa tsa li-valve tsa bolo.Ka mor'a tsoelo-pele e atlehileng ea Teflon, likhoebo tse ngata tse kang DuPont li ile tsa loanela tokelo ea ho e sebelisa, hobane li ne li tseba hore Teflon e ka tlisa melemo e mengata ea 'maraka.Qetellong, lik'hamphani tse fetang bonngoe li ile tsa khona ho etsa li-valve tsa Teflon.Li-valve tsa bolo ea Teflon lia fetoha 'me li ka etsa litiiso tse ntle ka mahlakoreng a mabeli.Ka mantsoe a mang, li na le mahlakore a mabeli.Hape ke bopaki ba ho lutla.Ka 1958, Howard Freeman e ne e le moetsi oa pele oa ho qapa valve ea bolo e nang le setulo se tenyetsehang sa Teflon, 'me moqapi oa hae o ne o e-na le tokelo ea molao.

Kajeno, li-valve tsa bolo li entsoe ka litsela tse ngata, ho kenyelletsa le ho lumellana ha tsona le lisebelisoa tse ka khonehang.Ntle le moo, ba ka sebelisa machining a CNC le mananeo a komporo (joalo ka mohlala oa Button) ho etsa li-valve tse ntle ka ho fetisisa.Haufinyane, baetsi ba li-valve tsa bolo ba tla khona ho fana ka likhetho tse ngata bakeng sa lihlahisoa tsa bona, ho kenyeletsoa kaho ea aluminium, ho se sebetse ho fokolang le matla a maholo a ho phunya, a lumellang basebelisi ho fetisa mokelikeli o fapaneng ka valve ka lebelo le lekanyelitsoeng la phallo.

kopo

Sepheo sa valve ea bolo ke ho laola phallo ea mokelikeli.Ba ka etsa sena ka litsela tse ngata.Ba ka fetola mefuta e itseng ea li-valve tsa phallo e tlaase, ba fana ka thibelo ea ho khutlela morao bakeng sa li-valve tse nang le likopano tsa ho hlahloba li-swing, ho arola tsamaiso, le ho fana ka ho koaloa ka ho feletseng bakeng sa li-gear operators.

Hobane li ka laoloa ka letsoho kapa ka motlakase, li-valve tsa bolo li ka sebeletsa lits'ebetso ka litlhophiso tse fapaneng.

Maemong a mangata, li-valve tsa bolo li sebelisetsoa ho bula le ho koala liphaephe tse nang le lintho tse tiileng tse emisitsoeng, li-slurries, metsi kapa likhase.Lisebelisoa tse ling moo li-valve tsa bolo li atisang ho sebelisoa li kenyelletsa tsamaiso ea liphaephe, lisebelisoa le lisebelisoa hoo e batlang e le liindasteri tsohle tse tsamaisang maro.U ka li fumana kae kapa kae ho tloha mokatong oa fektheri ho ea ho faucet lapeng la hau.Liindasteri tse sebelisangli-valve tsa bololi kenyeletsa tlhahiso, merafo, oli le khase, temo, ho futhumatsa le ho pholisa, lipeipi tsa indasteri le tsa malapa, metsi, thepa ea bareki, kaho, joalo-joalo.