li-valve tsa mofuta oa serurubele tse entsoeng ka tšepe ke khetho e tsebahalang liindastering tse fapaneng bakeng sa ts'epahalo ea tsona, ho kengoa habonolo, le ho boloka litšenyehelo. Li sebelisoa hangata lits'ebetsong tsa HVAC, litsi tsa ho hloekisa metsi, lits'ebetso tsa indasteri, le lits'ebetso tse ling moo taolo ea phallo e hlokahalang.