Isikhokelo esisisiseko sokuthintela ukusilela kwevalvu yokukhangela

Wamkelekile kuThomas Insights-yonke imihla, siza kukhupha iindaba zamva nje kunye nohlalutyo ukuze sigcine abafundi bethu besazi ngentsingiselo yeshishini. Bhalisa apha ukuthumela izihloko zosuku ngqo kwibhokisi yakho yangaphakathi. Phantse ishishini ngalinye elisebenzisa imibhobho ukuthutha ulwelo lixhomekeke ekusetyenzisweni kweevalvu zokutshekisha. Iivalve zokujonga-ezikwabizwa ngokuba ziivalvu zokutshekisha, iivalve zetshekhi, okanye iivalve zetshekhi-zivumela ukuqukuqela kwicala elinye ngelixa uthintela ukuhamba kwelinye icala okanye kwelinye icala. Ezi zivalo zivula kwaye zivale kuphela ngokusekelwe kuxinzelelo lwehydraulic oluveliswa kukuhamba kwamanzi okusebenza kwindlela yevalve. Iivalvu zokujonga ziqhele ukusetyenziswa kwimigca yomphunga, imigca yecondensate, imigca yamanzi, iisistim zeHVAC, kunye neempompo zokutya zekhemikhali, ukukhankanya nje izicelo ezimbalwa eziqhelekileyo. Ezi zivalo ziyinxalenye ebalulekileyo kwiimeko ezininzi, kuba ukuhamba umva kunokubangela umonakalo omkhulu kwezinye izixhobo. Ke ngoko, iimpawu zokungaphumeleli kwevalvu yokutshekisha kufuneka zibonwe kwangethuba ukuze kuthintelwe ixesha lokuphumla kwiziko kunye nokulungiswa kweendleko. Ukunxitywa kwee-elastomers kunye nokutywinwa kwezihlalo kunye namaqondo obushushu aphezulu okusebenza nako kunokubangela ukusilela kwevalvu yokukhangela. Isitshixo ekuthinteleni ukusilela kwevalvu yokukhangela kunye nokuqinisekisa ubomi benkonzo yevalvu bulungile kunye nokugcinwa rhoqo kokuthintela. Inyathelo lokuqala nelona lisebenzayo lokuthintela ukusilela kwevalvu kukugcina imibhobho kunye neevalvu zicocekile kwaye zingenabo ubumdaka. Oku kunokufezekiswa ngokufakela izihluzi kunye namagquma apho kuyimfuneko. Isixokelelwano semibhobho sinokugungxulwa rhoqo ukuze kususwe inkunkuma ediphozithiweyo kunye nokunciphisa ukufumba kwezinto ezingcolisayo. Ukuthambisa ivalve yenye indlela esebenzayo yokuthintela ukusilela kwevalvu kwangaphambi kwexesha. Ivalve yokukhangela yenziwe ngamacandelo amaninzi ashukumayo; ngoko ke, ukunciphisa ingxabano phakathi kwala macandelo ngokusebenzisa i-lubrication kunokwandisa ubomi benkonzo yeengxenye zevalve, ukuphucula ukusebenza ngokubanzi, kunye nokuqinisekisa ukusebenza kakuhle. Ekugqibeleni, i-valve kufuneka ifakwe ngokuchanekileyo kwaye isetyenziswe njengoko kuyalelwe. Ukufakwa okungafanelekanga kwevalve okanye ukusebenzisa uhlobo olungalunganga lwevalve yokukhangela kuya kunciphisa ubomi benkonzo yevalve. Isicwangciso sokugcinwa rhoqo kufuneka siphunyezwe ukuqinisekisa ukuba iivalvu ezingalunganga zitshintshwa kwiimpawu zokuqala zokungaphumeleli. Xa ukhetha ubungakanani bevalve, khumbula ukuvavanya ivalve yokukhangela kwisicelo esinikezelweyo, kungekhona ubungakanani bombhobho. Ukuthathela ingqalelo iimfuno zamandla exesha elizayo, ukwandisa ubungakanani bombhobho yinto eqhelekileyo. Nangona kunjalo, i-diameter enkulu yombhobho iya kuvelisa izinga lokuhamba eliphantsi, oku kuthetha ukuba kungabikho isantya samanzi esaneleyo sokuvula ngokupheleleyo i-valve yokutshekisha. Oku kubangela ukuba ivalve ejikelezayo, elinganiswe ngokobukhulu bombhobho, ukuba ijiwuze emva naphambili phakathi kweendawo ezivulekileyo nezivaliweyo. Le nto ibizwa ngokuba kukuncokola. Ukuphindaphinda kokunyakaza okubangelwa kukungcangcazela kuya kuthi ekugqibeleni kunyuse izinga lokunxitywa kwevalve kwaye kubangele ukusilela kwecandelo, okuya konakala ngakumbi ezinye izixhobo ezisezantsi. Ngoko ke, i-valve yokutshekisha kufuneka ikhethwe ngokwezinga lokuhamba elilindelekileyo. Oku kubandakanya ukukhetha ivalve enexabiso elifanelekileyo levalve (CV). Ixabiso le-CV lichaza amandla omthombo ojikelezayo wokuvula ngokupheleleyo ivalve; iphezulu i-CV, kokukhona ukuhamba okukhulu okufunekayo ukuvula ivalve. Kufuneka kwakhona uqwalasele uhlobo lwesiphakathi esiya kudlula kwivalve. Ngokomzekelo, i-corrosive media media okanye i-abrasive media ingafuna ukusetyenziswa kwezinto ezithile zevalve, ezifana ne-carbon steel, i-stainless steel, okanye ubhedu. Ukongezelela, kuyimfuneko ukuqwalasela iimpawu zolwelo oludlula kumbhobho ukuqinisekisa ukuhamba okungaphazamisekiyo. Izinto eziqinileyo, ulwelo, kunye neegesi zonke zahlukile kwi-viscosity, ukuxinana, kunye nomgangatho. Umtshini wevalvu wangaphakathi kufuneka uvumele olu hlobo losasazo olulodwa ukuba luhlaliswe. Ivalve yokuqhelaniswa nayo ibalulekile ukumisela uhlobo oluchanekileyo lwevalve yokukhangela kwisicelo esinikiweyo. Xa ifakwe phantsi kweemeko zokuhamba ngokuthe nkqo, ezinye iivalve zisenokungasebenzi njengoko kulindelekile. Ukongezelela, ukuba i-valve ithathwa njengefanelekileyo ukuhamba ngokuthe nkqo, isalathiso (phezulu okanye phantsi) kufuneka sinqunywe kuba le miqathango ineemfuno ezizodwa. Nangona zonke iivalve zokukhangela zenza umsebenzi ofanayo, iindlela zabo zangaphakathi zivumela ukuhamba kwendlela enye ngeendlela ezahlukeneyo. Nganye kwezi ndlela zifanelekile kwiimeko ezahlukeneyo; ngoko ke, kuyimfuneko ukuqonda iindlela ezisisiseko zokusebenza kwezi zivalo ukufumanisa ukuba yeyiphi isicelo esifanelekileyo. Iindidi ezahlukeneyo zeevalve zokutshekisha-nangona zifana ngokwengqiqo-zahluke kakhulu ngokubhekiselele kwindlela ye-valve yangaphakathi, uxinzelelo oluqhekezayo (olunxulumene ne-CV), kunye nezinto zokwakha. Izixhobo zangaphakathi zezi zivalo zikwanovelwano kwi-debris, amazinga okuhamba kunye neencopho zoxinzelelo. Ngoko ke, ukhetho olufanelekileyo lwe-valve kunye nokuhlolwa okufanelekileyo kwesiqhelo kuyisitshixo sokuthintela ukungaphumeleli kwangaphambili kwee-valve zokujonga kulo naluphi na uhlobo lwesicelo. Copyright © 2021 Thomas Publishing Company. onke Amalungelo Agciniwe. Nceda ubhekisele kwimigaqo nemiqathango, ingxelo yabucala kunye nesaziso sokungalandeleli saseCalifornia. Iwebhusayithi igqitywe ukulungiswa ngo-Agasti 15, 2021. UThomas Register® kunye noThomas Regional® bayinxalenye ye-Thomasnet.com. IThomasnet luphawu lwentengiso olubhalisiweyo lukaThomas Publishing Company.