Ponahalo ea valve ea bolo e bile ka mor'a Ntoa ea Bobeli ea Lefatše.Leha ho qaptjoa ha valve ea bolo ho qalile mathoasong a lekholo la bo20 la lilemo, patent ena ea sebopeho e ile ea hloleha ho phethela mehato ea eona ea khoebo ka lebaka la mefokolo indastering ea thepa le indastering ea ts'ebetso ea mochini.DuPont United States e ile ea qapa polasetiki e phahameng ea polymer polytetrafluoroethylene (PTFE) ho fihlela ka 1943. Mofuta ona oa thepa o na le melemo ea matla a lekaneng le a hatellang, elastoplasticity e itseng, thepa e ntle ea ho itlotsa le e ntle ka ho fetisisa ea ho thibela kutu, e loketseng haholo joaloka thepa ea ho tiisa ebile e na le phello e tšepahalang haholo ea ho tiisa.Ho phaella moo, bolo e nang le pota-potileng e phahameng le qetello e ntle ea holim'a metsi e ka etsoa e le setho sa ho koala sa valve ea bolo ka lebaka la nts'etsopele ea mechine ea ho sila libolo.Mofuta o mocha oa valve o nang le bore e feletseng le maeto a 90 ° rotatory angular o kena 'marakeng oa valve, o hohela tlhokomelo e ngata.Lihlahisoa tse tloaelehileng tsa li-valve tse kang li-valve tsa ho emisa, li-valve tsa heke, li-valve tsa plug le li-valve tsa serurubele butle-butle li nkeloa sebaka ke li-valve tsa bolo, 'me li-valve tsa bolo li sebelisoa haholo, ho tloha ho li-diameter tse nyenyane ho ea ho li-diameter tse kholo, khatello e tlaase ho ea khatello e phahameng, mocheso o tloaelehileng ho ea mocheso o phahameng. mocheso o phahameng ho isa boemong bo tlase.Hona joale, bophara bo boholo ba valve ea bolo bo fihlile ho 60 Inch, 'me mocheso o tlaase ka ho fetisisa o ka fihla mocheso oa metsi oa hydrogen -254 ℃.Mocheso o phahameng ka ho fetisisa o ka fihla ho tloha 850 ho ea ho 900 ℃.Tsena tsohle li etsa li-valve tsa bolo tse loketseng mefuta eohle ea mecha ea phatlalatso, e fetohang mofuta o tšepisang ka ho fetisisa oa valve.

Li-valve tsa bolo li ka aroloa ka li-valve tsa bolo tse phaphametseng le li-valve tsa bolo ea trunnion tse ipapisitseng le sebopeho.

Li-valve tsa bolo li ka aroloa ka li-valve tsa bolo e kenang holimo le li-valve tsa ho kena ka mahlakoreng.Li-valve tsa ho kena ka mahlakoreng li ka boela tsa aroloa ka li-valve tsa bolo ea karolo e le 'ngoe, li-valve tsa likotoana tse peli le li-valve tsa likotoana tse tharo ho latela sebopeho sa 'mele oa li-valve.Karolo e le 'ngoe ea li-valve tsa bolo e bohlokoa;li-valve tsa li-valve tse peli li na le lihlopha tse kholo tsa li-valve le li-valve tse thusang 'me li-valve tse nang le likarolo tse tharo li entsoe ka' mele o le mong oa mantlha le lihlopha tse peli tse thusang.

Li-valve tsa bolo li ka aroloa ho ba li-valve tsa bolo e tiisang le li-valve tse thata tse tiisang ho latela lisebelisoa tsa ho tiisa.Lisebelisoa tsa ho tiisa tsa li-valve tsa bolo e tiileng ke lisebelisoa tse phahameng tsa polymer tse kang polytetrafluoroethylene (PTFE), polytetrafluoroethylene e matlafalitsoeng le nylon hammoho le rabara.Lisebelisoa tsa ho tiisa tsa li-valve tsa bolo tse tiileng ke tšepe.