Under Cap Refrigerant Gas Filling Machine includes cans arrange machine, under-cap filler, valve feeding machine, conveyer belt, explosion proof motor, etc. Automatic refrigerant under cap aerosol filling machine can also be equipped with labeler, weighing machine, water bath leakage tester, etc. Automatic under cap aerosol filler is a kind of dedicated equipment which requires that products must be sealed immediately after filling from (non-core valve) covers in a vacuum state. This machine sets evacuation, fill and seal. It also can be used as capper.