Nen dekada 30, saybalbula na kulibangbanget naimbento ed Estados Unidos, inloob ed Japan nen dekada 50, tan malaknab ya inusar ed Japan nen dekada 60, tan inpromote ed China kayari na dekada 70. Diad kaplesan, saray butterfly valve ya masulok ya DN300 mm ed mundo et kalkalnan sinmalat ed saray gate valve. No ikompara edsaray balbula na gate, saray butterfly valves et antikey so panaon dan manlukas tan mansara, melag so operating torque, melag so espasyo parad pangi-install tan anlemew so belat da. No alaen so DN1000 bilang alimbawa, say butterfly valve et manga 2T, tan say gate valve et manga 3.5T, tan say butterfly valve et mainomay ya ikombina ed nanduruman kagawaan ed panagmaneho, ya maong so inkadukey tan inkamatoor to.
Say disbentaha na rubber sealbalbula na kulibangbanget no usaren itan parad panag-throttling, nagawa so cavitation lapud agsuston pangusar, ya pansengegan na pan-peel tan pakaderal na rubber seat. Diad agano niran taon, say China et nanggawa met na metal sealed butterfly valves, tan diad agano niran taon, say Japan et nanggawa met na comb-shaped butterfly valves ya ag-onkukurang ed cavitation, abeba so yegyeg tan abeba so ungol.
Say bilay na general sealing seat et 15-20 taon parad goma tan 80-90 taon parad metal diad normal iran kondisyon. Balet, no panon so manpili na susto et mandedepende ed saray kakaukolanen na kondisyon na trabaho.
Say siglaotan na panlukas na sakey abalbula na kulibangbangtan say flow rate et manunan linear tan proporsyonal. No usaren iya pian nakontrol so flow rate, say flow characteristics to et maapit met ya misiglaotan ed flow resistance na tubo, singa say diametro tan porma na saray balbula ya inyan ed duaran pipeline et pareho, tan say pipeline loss coefficient et mandumaan, tan say flow rate na valve et mandumaan a tuloy.
No say balbula et walad estado na baleg ya throttling, say beneg na plato na balbula et mainomay ya na-cavitate, tan walay posibilidad ya naderal so balbula, kanian kaslakan ya uusaren itan ed paway na 15°.
No say balbula na kulibangbang et walad pegley na lukas, say kurti na lukas ya naporma nabalbulasay laman tan say arap a sampot na butterfly plate et akasentro ed valve shaft, tan say duaran dapag et manporma na nanduruman estado, say arap a sampot na butterfly plate ed sakey a dapag et onkukurang ed direksion na onaagus a danum, tan say sananey a dapag et onkukurang sumpad direksion na onaagus a danum, kanian, say laman na balbula ed sakey a diking tan say plato na balbula et agmanporma na balbula- sizz- nayarin mipara ed sananey a dapag singa abut na throttle, say nozzle side et mas maples nen say throttle side, tan say negatibon pressure et nagawa ed silong na throttle side valve, tan say rubber seal et mabetbet ya napelag.
Say operating torque na butterfly valve, lapud nanduruman direksion na panlukas tan panlukas na balbula, et nanduruma so balor to, tan say horizontal butterfly valve, lalo la ed balbula ya baleg so diametro to, lapud kaaralem na danum, say torque ya napapawala na pandumaan na tagey tan leksab ya ulo na valve shaft et ag nayarin ibaliwala. Niarum ni, no walay siko ya iiyan ed inlet side na balbula, naporma so deflection flow, tan ondarakel so torque. No say balbula et walad pegley na lukas, say mekanismo na operasyon et kaukolan ya man-self-locking lapud kiwas na torque na agos na danum.
Oras na pangi-post: Aug-22-2024
