Makampani amafuta ndi gasi amagwira ntchito m'malo ovuta kwambiri, okhala ndi zovuta zambiri, kutentha kwambiri, komanso madzi owononga. M'mikhalidwe yotereyi, kudalirika ndi magwiridwe antchito a zida ndizofunikira kuti zitsimikizire chitetezo, magwiridwe antchito, komanso phindu. Mavavu, monga zinthu zofunika kwambiri pakugwiritsa ntchito mafuta ndi gasi, amagwira ntchito yofunika kwambiri pakuwongolera kayendedwe, kuthamanga, ndi komwe madzi amayendera. Kusankha ma valve apamwamba si nkhani yongogwira ntchito-ndi nkhani ya chitetezo, kutsata, ndi kusunga ndalama kwa nthawi yaitali. M'nkhaniyi, tiwona chifukwa chake khalidwe limafunikira posankha mavavu amafuta ndi gasi komanso momwe kuyika ndalama pazinthu zapamwamba kungapindulire ntchito zanu.