... -1 1 negative pressure 2 refilling machine 3 CE, UL, SGS, ISO, FDA powder filling machine,filling machine of powder, fire extinguisher powder filling ... machine is low price,easy to operation.Model ... KWFilling rate: 4 kg/minFilling residue: 1 kg ≤ 0.04 refilling machine for fire extinguishers GFM16-1