What size compressor do I need?

The compressor's capacity in m³/min or CFM is of more importance than its pressure (bar/PSI). This volume capacity must match the set blasting pressure and orifice of the nozzle.

The simple fact, "more power = more production" certainly applies to compressed air blasting. With more compressed air capacity larger nozzles can be used that provide a large blasting pattern. This way blasting work can be done faster.

Compressed air consumption

The compressed air consumption of a blasting machine is only determined by the orifice of thenozzle and the set blasting pressure. Type or contents of blastpot or e.g. hose lenghts do not influence the consumption.
The following table shows you the compressed air consumption in m³/min with different nozzle orifices and blasting pressures.

  1 bar 2 bar 3 bar 4 bar 5 bar 6 bar 7 bar 8 bar 9 bar 10 bar
Ø 3 mm 0.08 0.17 0.25 0.33 0.42 0.50 0.58 0.66 0.75 0.83
Ø 4 mm 0.15 0.30 0.44 0.59 0.74 0.89 1.03 1.18 1.33 1.48
Ø 4.8 mm 0.21 0.43 0.64 0.85 1.06 1.28 1.49 1.70 1.91 2.13
Ø 5 mm 0.23 0.46 0.69 0.92 1.15 1.38 1.62 1.85 2.08 2.31
Ø 6 mm 0.33 0.66 1.00 1.33 1.66 1.99 2.33 2.66 2.99 3.32
Ø 6.4 mm 0.38 0.76 1.13 1.51 1.89 2.27 2.65 3.03 3.40 3.78
Ø 7 mm 0.45 0.90 1.36 1.81 2.26 2.71 3.17 3.62 4.07 4.52
Ø 8 mm 0.59 1.18 1.77 2.36 2.95 3.55 4.14 4.73 5.32 5.91
Ø 9 mm 0.75 1.50 2.24 2.99 3.74 4.49 5.23 5.98 6.73 7.48
Ø 9.5 mm 0.83 1.67 2.50 3.33 4.17 5.00 5.83 6.67 7.50 8.33
Ø 10 mm 0.92 1.85 2.77 3.69 4.62 5.54 6.46 7.39 8.31 9.23
Ø 11 mm 1.12 2.23 3.35 4.47 5.59 6.70 7.82 8.94 10.05 11.17
Ø 12 mm 1.33 2.66 3.99 5.32 6.65 7.98 9.31 10.64 11.96 13.29
Ø12.7 mm 1.49 2.98 4.47 5.96 7.45 8.93 10.42 11.91 13.40 14.89
Ø 13 mm 1.56 3.12 4.68 6.24 7.80 9.36 10.92 12.48 14.04 15.60
Ø 16 mm 2.36 4.73 7.09 9.45 11.82 14.18 16.54 18.91 21.27 23.63
Ø 19 mm 3.33 6.67 10.00 13.33 16.66 20.00 23.33 26.66 30.00 33.33