Letoto la Valve Valve e nang le sebopeho sa fan - e bitsoa Gogver Valve, Flap Valve, 'me Melao ea polokeho ea Khase ea Lits'ebeletso tsa Gas E sebelisoa ka har'a tsamaiso ea likhoebo tsa khase e bohareng ea likhoebo le meepo ea meralo ea tikoloho le indasteri ea tikoloho, haholo-holo liholelong tse nang le chefo. Ho boetse ho loketse ho sebelisoa e le poleiti e foufetseng qetellong ea pepeli ho khutsufatsa nako ea ho lokisa kapa ho hokahanya sistimi e ncha ea lipeipi. Ha ho bapisoa le lisebelisoa tse ling tse halikiloeng ka lipente, letoto lena la boima la sefofu, ho na le ts'ebetso e bonolo, lebelo le phahameng la khase.