How much Hosepower air compressor should we choose ?
The filtered air is compressed typically 80 psig (5.5 kg/cm2) ~ 110 psig (7.6 kg/cm2). Air Tools use 90 psig (6.3 kg/cm2) in general.
AIR COMPRESSOR SELECTION CRITERIA :
0 to 80 psig (5.5 Bar) : single stage air compressor
80 to 250 psig (17.2 Bar) / continuous usage of tools : two-stage air compressor
Factors to Consider : demands of all air tools, equipments, and other air consumption variables.
Determined total demand SCFM : D ( 1 m3/min = 35.3147 SCFM )
and add approximately 20% for system variables or future growth. : D1 = D x 1.2
If D1 <= 100 SCFM : HP = D / 4
If D1 > 100 SCFM : HP = D / 5
* 1 HP = 0.7457 KW
If the air consumption of a air tool is 0.45 m3/min = 0.45 x 35.3147 = 15.89 SCFM
Add approximately 20 % for system variables or future growth. : 15.89 SCFM x 1.2 = 19.068 SCFM
Because 19.068 SCFM <= 100 SCFM , so the HP is 19.068 / 4 = 4.767
Approximately 5 HP air compressor is enough for continuous using.
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