1 hp (Horsepower) = 750 Watt, Pneumatic amount required for a machine is 400 Watt.
기계가 22대인 경우 22대 * 400 Watt = 8,800 W (8.8KW)
n case of 22 sets of machine, 22 sets * 400 Watt = 8,800 W (8.8KW). 8,800 Watt / 750 Watt = 11.73 hp: A compressor of 11.73 hp is required.
In this case, ±11 hp is sufficient pneumatic pressure. The pressure gauge of a compressor should be adjusted to 7kg / 1cm3. As there is a bit room of pneumatic pressure of a machine, ±11 hp can resolve.