Letoto lena la li-valve tse foufetseng tse bōpehileng joaloka fan li boetse li bitsoa goggle valve, flap valve, fan valve, 'me ke sesebelisoa se ka khaolang mochine oa khase o hlokoang ke GB6222-86 "Industrial Gas Safety Regulations". E sebelisoa tsamaisong ea liphaephe tse mahareng tsa khase tsa likhoebo tsa indasteri le tsa merafo, tsamaiso ea masepala, ts'ireletso ea tikoloho le liindasteri tse ling, haholo-holo tse loketseng ho khaoha ka ho felletseng ha likhase tse chefo, tse kotsi le tse tukang. E boetse e loketse ho sebelisoa e le poleiti e foufetseng qetellong ea phaephe ho khutsufatsa nako ea tlhokomelo kapa ho hokahanya tsamaiso e ncha ea liphaephe. Ha ho bapisoa le lisebelisoa tse ling tsa li-valve tse etsang hore ho khaotsoe ka ho feletseng pompong, letoto lena la li-valve tse nang le sebopeho sa fan li na le litšobotsi tsa sebopeho sa libuka, boima bo bobebe, boholo bo nyane, ts'ebetso e bonolo, lebelo la ts'ebetso, le ho khaola ho ka tšeptjoang ka ho feletseng. ts'ebetso ea khase.