Thebelofo ea boloe hlahile ka bo-1950.Ka tsoelopele e potlakileng ea mahlale le thekenoloji, ntlafatso e tsoelang pele ea theknoloji ea tlhahiso le sebopeho sa sehlahisoa, ka lilemo tse 40 feela, e se e ntlafalitse ka potlako ho ba sehlopha se seholo sa li-valve.Linaheng tse tsoetseng pele tsa bophirimela, tšebeliso ea li-valve tsa bolo e ntse e eketseha selemo le selemo.
Li-valve tsa bolo li sebelisoa haholo ho hloekisong ha peterole, liphaepheng tsa libaka tse telele, indastering ea lik'hemik'hale, ho etsa pampiri, ho etsa meriana, ho boloka metsi, matla a motlakase, tsamaiso ea masepala, litšepe le liindasteri tse ling, 'me li na le maemo a bohlokoa moruong oa naha.E na le ketso ea ho potoloha likhato tse 90, 'mele oa mokōkō ke selikalikoe, o nang le selikalikoe ka lesoba kapa mocha o fetang ka har'a axis ea oona.
Balofo ea bolo e sebelisoa haholo ho khaola, ho aba le ho fetola tsela ea phallo ea seaplane ho phaephe.E hloka feela ho potoloha likhato tse 90 mme torque e nyane e ka koaloa ka thata.Balofo ea bolo e loketse ka ho fetisisa bakeng sa ho sebelisoa e le valve ea ho fetola le ho koala, valve ea bolo e nang le V.Ntle le ho ela hloko lipeipi tsa liphaephe, li-valve tsa motlakase le tsona li lokela ho ela hloko ka ho khetheha maemo a tikoloho ao li sebelisoang ho tsona.Kaha sesebelisoa sa motlakase se ka har'a valve ea motlakase ke sesebelisoa sa electromechanical, boemo ba eona ba tšebeliso bo ameha haholo ke tikoloho ea tšebeliso ea eona.Tlas'a maemo a tloaelehileng, tlhokomelo e khethehileng e lokela ho lefshoa ho sebelisoa ha li-valve tsa bolo ea motlakase le li-valve tsa serurubele libakeng tse latelang.
Sehlopha sa mosebetsi
1. Balofo ea Bypass: Hangata valve ea bolo e buloa ke metsi a tsitsitseng, kahoo valve ea bypass e behiloe ho hatelloa pele, ke hore, mahlakoreng ka bobeli a tletse metsi;
2. Sephahla sa moea: ha ho tlatsa metsi, buoy e tla koala valve ka boeona ha moea o tlosoa;ha o phunya, buoy e tla theoleloa ka boeona ha e sebelisoa ho tlatsa moea;
3. Sephahla sa khatello ea khatello: ha u bula le ho koala valve, tlosa metsi a khatello pakeng tsa valve le sekoahelo sa ho tiisa ho qoba ho apara sekoahelo sa ho tiisa;
4. Valofo ea likhoerekhoere: tlosa likhoerekhoere karolong e ka tlaase ea khetla ea bolo.
Sehlopha sa phetiso
1. Valofo ea bolo ea pneumatic
2. Motlakase oa bolo ea motlakase
3. Hydraulic ball valve
4. Pneumatic hydraulic ball valve
5. Electro-hydraulic ball valve
6. Turbine drive ball valve
