Air Consumption Chart

To determine the consumption of air with abrasive, click the nozzle (internal diameter) you are using and drag the slider to specify the air pressure.
The consumption depends on the nozzle; it does not depend on the blast machine being used. The nozzle’s smallest internal bore can be determined using a Hodge Clemco orifice gauge, or by simply inserting a standard drill bit to match the internal bore size.

Nozzle (ID)

Pressure

Drag slider PSI = bar

Compressed Air & Abrasive Consumption

cubic feet/minute(CFM) cubic meters/minute
Note that the calculation result is based on a new/clean nozzle.

Alternatively use the table below

Air Consumption Table (c.f.m) Nozzle Pressure
bar0.30.71.01.41.72.02.42.83.03.43.84.04.85.56.27
psi51015202530354045505560708090100
1/8 ″
(3mm)
3.95.56.77.78.810.011.0012.313.0014.5015.5016.8019.0021.2021.7025.80A
8.010.011.3015.1015.1017.0018.0020.30B
0.310.370.430.480.510.57C
3/16 ″
(5mm)
9.613.616.718.319.621.824.0025.628.0032.4035.0036.8040.2047.6048.0055.80A
18.022.026.0030.0033.0038.0041.0045.00B
0.730.840.921.061.151.26C
1/4 ″
(6.5mm)
15.421.826.730.834.540.044.749.153.8058.2063.067.0076.0085.0092.80103.00A
18.021.025.028.031.034.038.041.044.047.051.054.061.068.074.081.00B
1.311.511.711.902.082.27C
5/16 ″
(8mm)
24.134.041.748.254.063.070.076.784.091.0096.0105.00119.00132.00146.00162.00A
23.029.035.041.047.053.059.065.071.077.0083.089.00101.00113.00126.00137.00B
2.162.502.833.163.533.84C
3/8 ″
(9.5mm)
34.649.060.069.077.090.0100.0110.0120.5130.0140.4151.00171.00191.00212.00231.00A
32.040.049.057.066.074.083.091.0100.0108.00117.0126.00143.00161.00173.00196.00B
3.023.534.004.504.855.50C
7/16 ″
(11mm)
47.366.681.894.6105.8123.5137.2150.4164.6178.40191.5205.80233.30260.70285.00326.00A
50.061.072.083.094.0105.0116.0124.0138.0147.00159.0170.00194.00217.00240.00254.00B
4.124.765.446.096.737.11C
1/2 ″
(12.5mm)
61.687.0107.0123.0138.0161.0179.2196.3215.0232.00251.0268.00304.00340.00377.00412.00A
68.082.096.0110.0124.0137.0152.0165.0181.0195.0210.0224.00252.00280.00309.00338.00B
5.466.287.067.858.659.46C
A = Discharge of free air through an orificeB = Discharge of air carrying abrasiveC = cubic metre per min

Suction Guns

SuctionCubic Feet per Min at (psi)Cubic Metre per Min at (bar)
Gun Type JetNozzle50607080901003.44.14.85.56.26.9
BNP 41/8 ″(3mm)3/16 ″5(mm)1517192224260.430.480.540.620.680.74
BNP 55/32 ″(4mm)5/16 ″(8mm)2326303337410.650.740.850.941.051.16
BNP 63/16 ″(5mm)3/8 ″(9.5mm)3438434854580.961.081.221.361.531.64
BNP 77/32 ″(5.5mm)7/16 ″(11mm)4551596572791.281.451.671.842.042.24
BNP 81/4 ″(6.5mm)1/2 ″(12.5mm)58687785951041.641.932.182.412.692.95

Need help choosing?

Feeling overwhelmed? Don’t worry. Hodge Clemco has you covered. Our friendly team offers expert advice to guide you to the perfect surface prep solution for your project, ensuring optimal results and efficiency. Chat with us today to find out more.