Iivalvu zesangokwayeiivalvu zeglowubhuziivalvu ezisetyenziswa ngokwesiqhelo.Xa ukhetha ivalve yesango okanye ivalve yeglowubhu, kunzima kubasebenzisi abaninzi ukwenza isigwebo esichanekileyo.Ke yintoni umahluko phakathi kwevalve yeglowubhu kunye nevalve yesango, kwaye ungayikhetha njani ekusetyenzisweni kwangempela?
Ngokuqhelekileyo, malunga nokukhethwa kwevalve kuyilo lwemibhobho, iivalve zesango zihlala zisetyenziswa kumajelo omanzi, kwaye iivalve zokumisa zisetyenziswa kumajelo egesi.Zombini iivalvu zeglowubhu kunye neevalvu zesango zizivalo zokutywina ezinyanzelekileyo.Bobabini batyhala idiski kunye nesitulo sevalve ukwenza itywina ngokujikeleza ivalve, endaweni yokuxhomekeka kuxinzelelo oluphakathi ukufezekisa itywina njengevalve yebhola.Umahluko phakathi kwevalve yeglowubhu kunye nevalve yesango kunye nomahluko phakathi kokusetyenziswa kwazo kunye nemilinganiselo: Ubude besakhiwo sevalve yesango, oko kukuthi, ubude phakathi kweendawo ze-flange mfutshane kunoko kwevalve yokuvala;ukuphakama kofakelo kunye nokuphakama kokuvula i-valve yokuvala i-valve encinci kune-valve yesango.Nangona zonke ziyimivimbo ye-angular, ukuphakama kokuvula i-valve yokuvala kuphela Isiqingatha se-diameter ye-nominal, ixesha lokuvula lifutshane kakhulu, kwaye ukuphakama kokuvula i-valve kufana ne-diameter ye-nominal.
Umahluko kwindlela yokuhamba kwendlela: i-valve yesango i-valve yokutywinwa kweendlela ezimbini, ezinokufikelela ukutywinwa ukusuka kumacala omabini, kwaye akukho mfuneko yolwalathiso lokufakela.Ivalve yokuvala inesakhiwo esimile okwe-S.Ivalve yokuvala inemfuno yendlela yokuhamba.I-valve yokuvala i-valve ene-diameter ye-nominal engaphantsi kwe-DN200 ihamba ukusuka ngaphantsi kwe-disc ukuya phezulu kwi-disc, kwaye i-valve yokuvala i-valve ene-diameter ye-nominal engaphantsi kwe-DN200 ihamba ukusuka phezulu ukuya kwi-disc. ivalve.Ngaphantsi kweflap.Nangona kunjalo, ivalve yokuvala umbane ithatha indlela yokungena ephuma ngentla kwevalve.Ekubeni i-valve ezininzi zokumisa zihamba zisuka ngaphantsi kwe-valve ye-valve ukuya phezulu, i-torque yokuvula i-valve inokunciphisa ngokufanelekileyo, kwaye i-hammer phenomenon yamanzi ebangelwa ukuvulwa kokuvula i-valve inokuphetshwa.Umahluko ekuchaseni ulwelo oluphakathi: xa uvulwe ngokupheleleyo, yonke indlela yokuhamba kwevalve yesango iguquguqukayo, ngaphandle kokuchasana, i-medium ayinayo ilahleko yokulahla uxinzelelo, kwaye i-coefficient yokumelana nokuhamba yi-0.08-0.12 kuphela.Ngaphezu koko, i-coefficient yokumelana nombane we-valve yokuvala i-2.4-6, eyi-3-5 amaxesha okumelana nokuhamba kwe-valve yesango.Ngoko ke, i-valve yokuvala ayifanelekanga kwiimeko zokusebenza ezifuna ukulahleka koxinzelelo oluphakathi.
Umahluko kwisakhiwo somphezulu wokutywina: indawo yokutywina yevalve yokumisa i-perpendicular to the pipeline.Xa ivaliwe, ukuba ukungcola okuphakathi kuhlala kwitywina, xa idiski yevalve kunye nesihlalo sevalve yokutywina yenza itywina, kulula ukuyonakalisa indawo yokutywina isihlalo sevalve kunye nevalve yesango Umphezulu wokutywina unesiphumo sokusula xa isango lihla, kwaye i-medium ingahlanjwa, kwaye umonakalo wokungcola okuphakathi kwindawo yokutywinwa kuncinci kakhulu.