Ivalvu engeyoyesiqhelo luhlobo lwevalvu engenamigangatho yokusebenza ecacileyo. Iiparamitha zayo zokusebenza kunye nobukhulu benziwe ngokwezifiso ngokukodwa ngokweemfuno zenkqubo. Ingayilwa kwaye itshintshwe ngokukhululekileyo ngaphandle kokuchaphazela ukusebenza kunye nokhuseleko. Nangona kunjalo, inkqubo yokwenziwa kwemishini isalandela imiqathango efanelekileyo yomgangatho wesizwe.

Uyilo lweevalvu ezingezizo ezisemgangathweni lufanele luqwalasele ukuba nengqondo kangakanani na kunye nokuba kunokwenzeka ngokupheleleyo. Ukongeza ekuxhomekeke kwiingcamango zemveli, uyilo lukwafuna uphando nophuhliso olutsha ngakumbi. Ke ngoko, ngokubanzi, kukho iingcali kwishishini ukuze zigqibezele umsebenzi ofanayo, kwaye iinjineli ziya kunikezela ngemizobo emva kokuba uyilo lugqityiwe.

Iindidi zeevalvu ezingezizo ezisemgangathweni zahlulwe zibe ziivalvu zendle (i-penstock gate kunye ne-flap valve) kunye neevalvu ze-metallurgical (i-ventilation butterfly valve, i-slide gate valve, i-goggle valve, i-ash discharge valve, njl.njl.)

1. Uthotho lweevalvu zogutyulo lwelindle

2. Uthotho lweevalvu zeMetallurgical