Belofo ke sesebelisoa sa ho laola ho phalla, khatello le tsela eo mokelikeli o eang ka eona.Mokelikeli o laoloang e ka 'na ea e-ba mokelikeli, khase, motsoako oa mokelikeli oa khase, kapa motsoako o tiileng-metsi.Valve hangata ka 'mele oa valve, sekoahelo, setulo, likotoana tse bulehileng le tse koalang, mochine oa ho khanna, litiiso le li-fasteners, joalo-joalo.Ts'ebetso ea taolo ea valve e itšetlehile ka mochine oa ho khanna kapa mokelikeli ho khanna ho phahamisa, ho thella, ho sisinyeha kapa ho potoloha ha likarolo tsa ho bula le ho koala ho fetola boholo ba sebaka sa semathi.

Li-valve li na le mefuta e mengata ea tšebeliso 'me li amana haufi-ufi le bophelo ba batho ba letsatsi le letsatsi, joalo ka lipompo tsa lipeipi tsa metsi le li-valve tse fokotsang khatello bakeng sa litofo tsa khase ea peterole e metsi.Li-valve le tsona ke likarolo tsa bohlokoa mefuteng e fapaneng ea lisebelisoa tsa mochini tse kang lienjineri tse tukang ka hare, lienjine tsa mouoane, li-compressor, lipompo, li-actuator tsa pneumatic, likoloi tsa hydraulic drive system, likepe le lifofane.

Pele ho lilemo tse 2,000 BC, Machaena a ne a sebelisa liphaephe tsa bamboo le li-valve liphaepheng tsa metsi, liheke tsa metsi ka har'a likanale tsa nosetso, le li-valve tsa ho hlahloba lipoleiti tse neng li qhibiliha ka nts'etsopele ea mahlale a ho qhibilihisa le mechini ea haeteroliki, li-valve tsa koporo le lead li hlahile Europe.Ka kenyelletso ea boiler, 1681 e ile ea hlahisa valve ea tšireletso ea mofuta oa lever hamore.1769 le li-valve tsa ho hlahloba e ne e le li-valve tsa mantlha ho fihlela enjene ea mouoane oa Watt.Ho qaptjoa ha enjene ea mouoane ho ile ha tlisa valve tšimong ea indasteri ea mechine.Ntle le plug, liphallelo le li-valve tsa ho hlahloba tse sebelisoang lienjineng tsa mouoane tsa Watt, li-valve tsa serurubele li sebelisoa ho laola phallo.Ka ho eketseha ha phallo ea mouoane le khatello, tšebeliso ea valve ea plug ho laola ho kenngoa ha mouoane le ho tsoa ha enjene ea mouoane e ke ke ea finyella litlhoko, kahoo ho na le valve ea slide.

Pele le ka morao ho 1840, ho ne ho e-na le li-valve tsa lefats'e tse nang le lithupa tse khoeleng le li-valve tsa Wedge tse nang le lithupa tse entsoeng ka Trapezoidal, e leng katleho e kholo ho nts'etsopele ea li-valve.Ponahalo ea mefuta ena e 'meli ea li-valve ha ea ka ea khotsofatsa feela tlhoko e ntseng e eketseha ea khatello le mocheso liindastering tse fapaneng ka nako eo, empa hape e ne e khotsofatsa tlhoko ea taolo ea phallo.Ho tloha ka nako eo, ka nts'etsopele ea indasteri ea matla a motlakase, indasteri ea peterole, indasteri ea lik'hemik'hale le indasteri ea kaho ea likepe, mefuta eohle ea li-valve tsa khatello e phahameng le e bohareng e 'nile ea ntlafatsoa ka potlako.

Ka mor'a Ntoa ea Bobeli ea Lefatše, ka lebaka la nts'etsopele ea lisebelisoa tsa polymer, lisebelisoa tsa ho tlotsa, tšepe e sa hloekang le cobalt-based carbide, Old Plug Valve le valve ea serurubele li sebelisitsoe lits'ebetsong tse ncha, li-valve tsa bolo le diaphragm valve li entsoe ka potlako.Li-valve tsa globe, li-valve tsa heke le li-valve tse ling tsa mefuta e fapaneng e eketsehang le boleng.Indasteri ea tlhahiso ea li-valve butle-butle e fetohile karolo ea bohlokoa ea indasteri ea mechini.Li-valve ho latela ts'ebeliso ea ts'ebetso li ka aroloa ka li-valve tse thibelang, li-valve tse laolang, li-valve tsa ho hlahloba, li-valve tsa diversion, li-valve tsa polokeho, mekhahlelo ea 6 e nang le merero e mengata.