The propellants cover Freon, C butane gas, dimethyl ether, carbon dioxide, nitrogen, oxygen, compressed air and 134a and so on. It automatically boosts and liquefies the propellant, keeps it in the appropriate pressure parameters and does the quantitative filling to the propellant. The propellants cover Freon, C butane gas, dimethyl ether, carbon dioxide, nitrogen, oxygen, compressed air and 134a ...