Ma valve owunikira angagwiritsidwenso ntchito pa mapaipi pomwe kupanikizika mu dongosolo lothandizira kumatha kukwera pamwamba pa kuthamanga kwa dongosolo. Check mavavu akhoza makamaka...
Mfundo yogwirira ntchito ya valavu yachipata chamanja: Sinthani gudumu lamanja. Kupyolera mu chiyanjano ndi kusagwirizana kwa ulusi pakati pa handwheel ndi tsinde la valve ...
Kwa ogula mapaipi a mafakitale padziko lonse lapansi, kulankhulana maso ndi maso ndi opanga ma valve odalirika kumakhalabe njira yabwino kwambiri yotsimikizira mphamvu ya fakitale, kuyang'ana khalidwe lazogulitsa ndikukambirana njira zothetsera polojekiti.