Ivalve sisixhobo sokulawula ukuhamba, uxinzelelo, kunye necala lolwelo.Ulwelo olulawulwayo lusenokuba lulwelo, irhasi, umxube werhasi-ulwelo, okanye umxube wolwelo oluqinileyo.I-valve idla ngomzimba wevalvu, isigqubuthelo, isihlalo, iziqwenga ezivulekileyo nezivaliweyo, indlela yokuqhuba, izitywina kunye neziqhoboshi, njalo njalo.Umsebenzi wokulawula we-valve uxhomekeke kwindlela yokuqhuba okanye ulwelo lokuqhuba ukunyusa, ukutyibilika, ukuguquka okanye ukunyakaza okujikelezayo kwendawo yokuvula kunye nokuvala ukutshintsha ubungakanani bendawo yomgijimi.

Iivalvu zinoluhlu olubanzi losetyenziso kwaye zinxulumene ngokusondeleyo kubomi bemihla ngemihla babantu, njengeempompo zemibhobho yamanzi kunye neevalvu zokunciphisa uxinzelelo kwizitovu zegesi yepetroleum enyibilikisiweyo.Iivalvu zikwayinxalenye ebalulekileyo yezixhobo ezahlukeneyo zoomatshini ezinjengeenjini zokutsha zangaphakathi, ii-injini zomphunga, iicompressor, iimpompo, ii-actuator zepneumatic, ii-hydraulic drive system system, iinqanawa kunye neenqwelomoya.

Phambi kwe-2,000 BC, amaTshayina asebenzisa imibhobho yoqalo kunye neevalvu zecork kwimibhobho yamanzi, amasango amanzi kwimisele yokunkcenkceshela, kunye neevalvu zokujonga ipleyiti ekunyibilikiseni umbhobho ngophuhliso lwetekhnoloji yokunyibilikisa kunye noomatshini behydraulic, ubhedu kunye neevalvu zeplagi ezikhokelayo ziye zavela eYurophu.Ngokungeniswa kwebhoyila, i-1681 yazisa ivalve yokhuseleko lohlobo lwehamile.Ngo-1769 kwaye iivalvu zokukhangela yayizezona zivalo ziphambili kude kube yi-Watt steam injini.Ukuveliswa kwe-injini yomphunga kuzise ivalve kwindawo yoshishino lomatshini.Ukongeza kwiplagi, i-relief kunye ne-check valves ezisetyenziswa kwiinjini ze-Watt's steam, iivalve ze-butterfly zisetyenziselwa ukulawula ukuhamba.Ngokunyuka kokuhamba kwe-steam kunye noxinzelelo, ukusetyenziswa kwe-valve yeplagi ukulawula ukungena kwe-steam kunye nokukhutshwa kwe-injini ye-steam ayikwazi ukuhlangabezana neemfuno, ngoko kukho i-valve yesilayidi.

Phambi nasemva ko-1840, bekukho iivalvu zeglowubhu ezinezikhondo eziphothiweyo kunye neeValve zeWedge ezineziqu ezinemisonto yeTrapezoidal, eyayiyeyona nto iphambili kuphuhliso lwevalvu.Ukubonakala kwezi ntlobo zimbini zeevalvu akwanelanga nje kuphela imfuno ekhulayo yoxinzelelo kunye nobushushu kumashishini ahlukeneyo ngelo xesha, kodwa kwanelisa imfuno yolawulo lokuhamba.Ukusukela ngoko, ngophuhliso lweshishini lamandla ombane, ishishini lepetroleum, ishishini lemichiza kunye neshishini lokwakha iinqanawa, zonke iintlobo zeevalvu eziphakamileyo neziphakathi ziye zaphuhliswa ngokukhawuleza.

Emva kweMfazwe Yehlabathi yesiBini, ngenxa yokuphuhliswa kwezixhobo zepolymer, izinto zokuthambisa, insimbi engenasici kunye ne-cobalt-based carbide, i-Old Plug Valve kunye ne-butterfly valve isetyenziswe kwizicelo ezintsha, i-valve yebhola kunye ne-diaphragm valve ziye zaphuhliswa ngokukhawuleza.Iivalve zeglobhu, iivalve zesango kunye nezinye iivalve zokwandiswa kweentlobo ezahlukeneyo kunye nomgangatho.Ishishini lokwenziwa kweevalvu ngokuthe ngcembe libe licandelo elibalulekileyo loshishino loomatshini.I-valve ngokokusetyenziswa komsebenzi inokwahlulwa ibe yi-valve yebhloko, ivalve yokulawula, i-valve yokukhangela, i-valve yokuguqula, i-valve yokukhusela, i-valve ye-multi-purpose 6 iindidi.