Khatello ea lebitso (PN), Class American standard pound level ( Lb ), ke mokhoa oa ho bontša khatello, phapang ke hore khatello eo ba e emelang e lumellana le mocheso o fapaneng oa mocheso, tsamaiso ea PN Europe e bua ka khatello ea 120 ° C. khatello e tšoanang, ha CLAss American Standard e bua ka khatello e lumellanang le 425.5 ° C. Ka hona, ka phapanyetsano ea boenjiniere, ho ke ke ha khoneha ho etsa phetoho ea khatello feela.Mohlala, CLAss300 e lokela ho ba 2.1MPa ka phetoho e bonolo ea khatello.Leha ho le joalo, haeba mocheso o sebetsang o nkoa, khatello e lumellanang e tla eketseha.Ho ea ka teko ea mocheso le khatello ea khatello ea thepa Tekanyo e lekana le 5.0MPa.
Ho na le mefuta e 'meli ea litsamaiso tsa li-valve: e' ngoe ke "khatello ea lebitso" e emetsoeng ke Jeremane (ho kenyeletsoa Chaena) e itšetlehileng ka khatello e amohelehang ea ho sebetsa mocheso oa kamore (100 degrees naheng ea heso le 120 degrees Jeremane).E 'ngoe ke "sistimi ea mocheso le khatello" e emeloang ke United States, e emeloang ke khatello e lumelletsoeng ea ho sebetsa mochesong o itseng.Tsamaisong ea mocheso le khatello ea United States, ntle le 150Lb, e thehiloeng ho likhato tse 260, maemo a mang a thehiloe ho likhato tse 454..Khatello e amohelehang ea sehlopha sa 150-psi (150psi = 1MPa) No. 25 carbon steel valve ke 1MPa ka likhato tsa 260, 'me khatello e lumelletsoeng ka mocheso oa kamore e kholo haholo ho feta 1MPa, e ka bang 2.0MPa.Ka hona, ha re bua ka kakaretso, boemo ba khatello ea lebitso bo tsamaellanang le American Standard 150Lb ke 2.0MPa, 'me boemo ba khatello ea lebitso bo tsamaellanang le 300Lb ke 5.0MPa, joalo-joalo. mokhoa oa ho fetola khatello .
PN ke khoutu e amanang le khatello e emeloa ke linomoro, 'me ke palo e loketseng e pota-potileng bakeng sa litšupiso.PN ke nomoro ea MPa e hanyetsanang le khatello e batlang e lekana le mocheso o tloaelehileng, e leng khatello ea lebitso eo hangata e sebelisoang keLi-valve tsa Sechaena.Bakeng sa li-valve tsa taolo tse nang levalve ea tšepe ea carbon'mele, e bolela khatello e phahameng e lumelletsoeng ea ho sebetsa ha e sebelisoa ka tlase ho 200 ° C;bakeng sa 'mele oa li-valve tsa tšepe, e bolela khatello e phahameng e lumelletsoeng ea ho sebetsa ha e sebelisoa ka tlase ho 120 ° C;Khatello e phahameng e lumelletsoeng ea ho sebetsa bakeng sa lits'ebetso tse ka tlase ho 250°C.Ha mocheso o sebetsang o phahama, khatello ea khatello ea 'mele oa valve e tla fokotseha.Sephahla se tloaelehileng sa Amerika se hlalosa khatello ea lebitso ka lik'hilograma, e leng sephetho sa ho bala mocheso o kopantsoeng le khatello ea tšepe e itseng , e baloang ho ea ka tekanyo ea ANSI B16.34.Lebaka le ka sehloohong leo ka lona sehlopha sa liponto le khatello ea lebitso e seng mangolo a le mong ke hore mocheso oa mocheso oa sehlopha sa ponto le khatello ea lebitso e fapane.Hangata re sebelisa software ho bala, empa hape re hloka ho tseba ho sebelisa litafole ho hlahloba likala.Haholo-holo Japane e sebelisa boleng ba K ho bontša boemo ba khatello.Bakeng sa khatello ea khase, Chaena, ka kakaretso re sebelisa "kg" ea boima ba eona ho hlalosa (ho e-na le "jin"), 'me yuniti ke lik'hilograma.Setsi se tsamaisanang sa khatello ke "kg/cm2", 'me kilogram e le' ngoe ea khatello e bolela hore kilogram e le 'ngoe ea matla e sebetsa ka lisenthimithara tse le 'ngoe.Ka mokhoa o ts'oanang, ho lumellana le linaha tsa linaheng tse ling, bakeng sa khatello ea khase, mochine oa khatello o sebelisoang hangata ke "psi", 'me unit ke "1 pound / inch2", e leng "lik'hilograma ka lisenthimithara".Lebitso le felletseng la Senyesemane ke Liponto ka lisenthimithara tse tharo.Empa e atisa ho sebelisoa ho bitsa ka ho toba boima ba eona, ke hore, pound (Lb.), eo ha e le hantle e leng Lb.Ke matla a ponto a boletsoeng pejana.E ka baloa ka ho fetola li-unit tsohle hore e be metric units: 1 psi = 1 pound/inch2 ≈0.068bar, 1 bar≈14.5psi≈0.1MPa, linaha tse kang Europe le United States li sebelisetsoa ho sebelisa psi e le yuniti.Ho Class600 le Class1500, ho na le litekanyetso tse peli tse fapaneng tse tsamaellanang le maemo a Europe le maemo a Amerika.11MPa (e tsamaellanang le sehlopha sa 600-pound) ke taolo ea tsamaiso ea Europe, e boletsoeng ho "ISO 7005-1-1992 Steel Flanges";10MPa (e tsamaellanang le Sehlopha sa 600-pound class) ke taolo ea tsamaiso ea Amerika, e leng molao ho ASME B16.5.Ka hona, ho ke ke ha boleloa ka ho feletseng hore sehlopha sa 600-pound se lumellana le 11MPa kapa 10MPa, 'me melao ea tsamaiso e fapaneng e fapane.
Haholo-holo ho na le mefuta e 'meli ea litsamaiso tsa li-valve: e' ngoe ke "khatello ea lebitso" e emetsoeng ke Jeremane (ho kenyeletsoa naha ea heso) e itšetlehileng ka khatello e amohelehang ea ho sebetsa mocheso oa kamore (100 degrees naheng ea heso le 120 degrees Jeremane).E 'ngoe ke tsamaiso ea "mocheso le khatello" e emeloang ke United States, e emeloang ke khatello e lumelletsoeng ea ho sebetsa mochesong o itseng.Tsamaisong ea mocheso le khatello ea United States, ntle le 150Lb, e thehiloeng ho likhato tse 260, maemo a mang a thehiloe ho likhato tse 454.benchmark.Ka mohlala, khatello e lumelletsoeng ea 150Lb.25 carbon steel valve ke 1MPa ka likhato tse 260, 'me khatello e amohelehang mochesong oa kamore e kholo ho feta 1MPa, e ka bang 2.0MPa.Ka hona, ha re bua ka kakaretso, boemo ba khatello ea lebitso bo tsamaellanang le American Standard 150Lb ke 2.0MPa, 'me boemo ba khatello ea lebitso bo tsamaellanang le 300Lb ke 5.0MPa, joalo-joalo. mokhoa oa ho fetola khatello .
Kaha metheo ea mocheso ea khatello ea lebitso le tekanyo ea khatello e fapane, ha ho na mangolo a tiileng pakeng tsa tse peli.Lingollano tse mpe lipakeng tsa tse peli li bonts'oa tafoleng.
Nako ea poso: Aug-31-2023