I-valve yebhola eyenziwa ngesandla, i-butterfly valve kanye ne-plug valve kuwuhlobo olufanayo lwevalvu. Umehluko wukuthi ingxenye yokuvala ye-valve yebhola iyibhola, elizungeza umugqa ophakathi womzimba we-valve ukuze kuzuzwe ukuvula nokuvala. I-valve yebhola isetshenziselwa kakhulu ukusika, ukusabalalisa kanye nokushintsha indlela yokuhamba kwe-medium epayipini. Ivalvu yebhola eneziqephu ezintathu wuhlobo olusha lwevalvu esetshenziswe kabanzi eminyakeni yamuva. Lolu hlobo lwe-valve ngokuvamile kufanele lufakwe ngokuvundlile epayipini.

Isihlalo se-valve yenkampani ye-NSW esintantayo sinomsebenzi omuhle wokuvala. Indandatho yokuvala ye-valve yebhola iningi lenziwe ngezinto ezinwebekayo njenge-PTFE (RPTFE, NYLON, DEVLON, PEEK njll.). Isakhiwo sokufaka uphawu esithambile silula ukuqinisekisa ukubekwa uphawu, futhi njengoba ingcindezi ephakathi ikhula, amandla okuvalwa kwe-valve yebhola ayanda. I-stem seal inokwethenjelwa. Lapho i-valve yebhola ivuliwe futhi ivaliwe, isiqu se-valve sijikeleza kuphela futhi asihambi phezulu naphansi. I-valve stem packing seal akulula ukuthi yonakaliswe. Amandla okuvalwa kwe-valve stem reverse seal akhuphuka ngokunyuka kwengcindezi ephakathi nendawo. Ngenxa yokuthi i-PTFE nezinye izinto zinezinto ezinhle zokuzigcoba, umonakalo wokungqubuzana nebhola le-valve yebhola kuncane, futhi i-valve yebhola inokuphila ende yesevisi. Imodeli yokusetshenziswa ingafakwa nge-pneumatic, kagesi, i-hydraulic nezinye izindlela zokushayela ukuze ibone isilawuli kude nokusebenza okuzenzakalelayo. Ishaneli ye-valve yebhola ibushelelezi futhi ingathutha uketshezi lwe-viscous, ama-slurries nezinhlayiya eziqinile.

Ivalvu yebhola elintantayo iwuhlobo lwevalvu eyaphuma ngeminyaka yawo-1950. Engxenyeni yekhulu leminyaka, i-valve yebhola isithuthuke yaba isigaba esikhulu se-valve. I-valve yebhola isetshenziselwa kakhulu ukusika noma ukuxhuma i-medium, futhi ingasetshenziselwa ukulungisa nokulawula uketshezi. I-valve ye-Segment ball valve (i-V notch ball valve) ingenza ukulungisa nokulawula ukugeleza okunembe kakhudlwana, futhi i-valve yebhola yezindlela ezintathu isetshenziselwa ukusabalalisa okuphakathi nokushintsha indlela yokugeleza kwendawo emaphakathi. Ama-valve ebhola enziwa ngesandla aqanjwe ngokuyinhloko ngokusekelwe kumodi yokushayela ye-valve yebhola ngokuphendula isondo lesandla noma isibambo.