Iivalve yebholayaphuma ngeminyaka yee-1950.Ngophuhliso olukhawulezayo lwenzululwazi nobuchwepheshe, ukuphuculwa okuqhubekayo kobugcisa bemveliso kunye nesakhiwo semveliso, kwiminyaka nje engama-40, iye yaphuhliswa ngokukhawuleza yaba ludidi olukhulu lwevalvu.Kumazwe asentshona aphuhlileyo, ukusetyenziswa kweevalve zebhola kuyanda unyaka nonyaka.
Iivalvu zebhola zisetyenziswa kakhulu ekusulungeni i-petroleum, kwimibhobho yomgama omde, kwishishini lemichiza, ekwenzeni iphepha, kumayeza, kugcino lwamanzi, kumandla ombane, kulawulo lukamasipala, kwintsimbi kunye namanye amashishini, kwaye zikwindawo ebalulekileyo kuqoqosho lwesizwe.Inesenzo sokujikeleza i-90 degrees, i-cock body yi-sphere, kunye nesetyhula ngomngxuma okanye umjelo odlula kwi-axis yayo.
Ivalve yebhola isetyenziselwa ikakhulu ukusika, ukusasaza kunye nokutshintsha indlela yokuhamba kwe medium kumbhobho.Kufuneka kuphela ukujikeleza i-90 degrees kunye ne-torque encinci ingavalwa ngokuqinileyo.Ivalve yebhola yeyona ifaneleke kakhulu ukusetyenziswa njengesitshixo kunye nevalve yokuvala, ivalve yebhola eyi-V.Ukongeza kokunikela ingqalelo kwiiparamitha zemibhobho, iivalve zombane kufuneka kwakhona zihlawule ingqalelo ekhethekileyo kwiimeko zokusingqongileyo apho zisetyenziswa khona.Ekubeni isixhobo sombane kwi-valve yombane sisixhobo se-electromechanical, imeko yokusetyenziswa kwayo ichaphazeleka kakhulu kwindawo yokusetyenziswa kwayo.Ngaphantsi kweemeko eziqhelekileyo, ingqwalasela ekhethekileyo kufuneka ihlawulwe ekusebenziseni i-valve yebhola yombane kunye ne-butterfly valves kwiindawo ezilandelayo.
Ukuhlelwa komsebenzi
1. Ivalve ye-bypass: Ivalve yebhola ngokuqhelekileyo ivulwa ngamanzi angatshintshiyo, ngoko i-valve ye-bypass imiselwe ukuba icinezelwe kuqala, oko kukuthi, omabini amacala azaliswe ngamanzi;
2. I-valve yomoya: xa ugcwalisa amanzi, i-buoy iya kuvala ngokuzenzekelayo i-valve xa umoya ususiwe;xa ukhupha, i-buoy iya kuthotywa ngokwayo xa isetyenziselwa ukuzalisa umoya;
3. Ivalve yoxinzelelo loxinzelelo: xa uvula kwaye uvala ivalve, susa amanzi oxinzelelo phakathi kwevalve kunye nesivalo sokutywina ukuphepha ukunxiba isivalo sokutywina;
4. Ivalve yogutyulo: Khupha ilindle kwindawo engezantsi yeqokobhe lebhola.
Ukuhlelwa kokudluliselwa
1. Ivalve yebhola yomoya
2. Ivalve yebhola yombane
3. Ivalve yebhola yeHydraulic
4. Ivalve yebhola ye-hydraulic yepneumatic
5. Ivalve yebhola ye-Electro-hydraulic
6. Ivalve yebhola ye-turbine drive
