Standard Machines – Direct Pressure Nozzles
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)
Nozzle Air 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 – to determine the cfm required lookup the nozzle size in the left column and the air pressure on the top row.
| Air Consumption Table (c.f.m) Nozzle Pressure | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| bar | 0.3 | 0.7 | 1.0 | 1.4 | 1.7 | 2.0 | 2.4 | 2.8 | 3.0 | 3.4 | 3.8 | 4.0 | 4.8 | 5.5 | 6.2 | 7 | |
| psi | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 70 | 80 | 90 | 100 | |
| 1/8″ (3mm) |
3.9 | 5.5 | 6.7 | 7.7 | 8.8 | 10.0 | 11.00 | 12.3 | 13.00 | 14.50 | 15.50 | 16.80 | 19.00 | 21.20 | 21.70 | 25.80 | A |
| 8.0 | 10.0 | 11.30 | 15.10 | 15.10 | 17.00 | 18.00 | 20.30 | B | |||||||||
| 0.31 | 0.37 | 0.43 | 0.48 | 0.51 | 0.57 | C | |||||||||||
| 3/16″ (5mm) |
9.6 | 13.6 | 16.7 | 18.3 | 19.6 | 21.8 | 24.00 | 25.6 | 28.00 | 32.40 | 35.00 | 36.80 | 40.20 | 47.60 | 48.00 | 55.80 | A |
| 18.0 | 22.0 | 26.00 | 30.00 | 33.00 | 38.00 | 41.00 | 45.00 | B | |||||||||
| 0.73 | 0.84 | 0.92 | 1.06 | 1.15 | 1.26 | C | |||||||||||
| 1/4″ (6.5mm) |
15.4 | 21.8 | 26.7 | 30.8 | 34.5 | 40.0 | 44.7 | 49.1 | 53.80 | 58.20 | 63.0 | 67.00 | 76.00 | 85.00 | 92.80 | 103.00 | A |
| 18.0 | 21.0 | 25.0 | 28.0 | 31.0 | 34.0 | 38.0 | 41.0 | 44.0 | 47.0 | 51.0 | 54.0 | 61.0 | 68.0 | 74.0 | 81.00 | B | |
| 1.31 | 1.51 | 1.71 | 1.90 | 2.08 | 2.27 | C | |||||||||||
| 5/16″ (8mm) |
24.1 | 34.0 | 41.7 | 48.2 | 54.0 | 63.0 | 70.0 | 76.7 | 84.0 | 91.00 | 96.0 | 105.00 | 119.00 | 132.00 | 146.00 | 162.00 | A |
| 23.0 | 29.0 | 35.0 | 41.0 | 47.0 | 53.0 | 59.0 | 65.0 | 71.0 | 77.00 | 83.0 | 89.00 | 101.00 | 113.00 | 126.00 | 137.00 | B | |
| 2.16 | 2.50 | 2.83 | 3.16 | 3.53 | 3.84 | C | |||||||||||
| 3/8″ (9.5mm) |
34.6 | 49.0 | 60.0 | 69.0 | 77.0 | 90.0 | 100.0 | 110.0 | 120.5 | 130.0 | 140.4 | 151.00 | 171.00 | 191.00 | 212.00 | 231.00 | A |
| 32.0 | 40.0 | 49.0 | 57.0 | 66.0 | 74.0 | 83.0 | 91.0 | 100.0 | 108.00 | 117.0 | 126.00 | 143.00 | 161.00 | 173.00 | 196.00 | B | |
| 3.02 | 3.53 | 4.00 | 4.50 | 4.85 | 5.50 | C | |||||||||||
| 7/16″ (11mm) |
47.3 | 66.6 | 81.8 | 94.6 | 105.8 | 123.5 | 137.2 | 150.4 | 164.6 | 178.40 | 191.5 | 205.80 | 233.30 | 260.70 | 285.00 | 326.00 | A |
| 50.0 | 61.0 | 72.0 | 83.0 | 94.0 | 105.0 | 116.0 | 124.0 | 138.0 | 147.00 | 159.0 | 170.00 | 194.00 | 217.00 | 240.00 | 254.00 | B | |
| 4.12 | 4.76 | 5.44 | 6.09 | 6.73 | 7.11 | C | |||||||||||
| 1/2″ (12.5mm) |
61.6 | 87.0 | 107.0 | 123.0 | 138.0 | 161.0 | 179.2 | 196.3 | 215.0 | 232.00 | 251.0 | 268.00 | 304.00 | 340.00 | 377.00 | 412.00 | A |
| 68.0 | 82.0 | 96.0 | 110.0 | 124.0 | 137.0 | 152.0 | 165.0 | 181.0 | 195.0 | 210.0 | 224.00 | 252.00 | 280.00 | 309.00 | 338.00 | B | |
| 5.46 | 6.28 | 7.06 | 7.85 | 8.65 | 9.46 | C | |||||||||||
| A = Discharge of free air through an orifice | B = Discharge of air carrying abrasive | C = cubic metre per min | |||||||||||||||
Suction Guns
| Suction | Cubic Feet per Min at (psi) | Cubic Metre per Min at (bar) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gun Type Jet | Nozzle | 50 | 60 | 70 | 80 | 90 | 100 | 3.4 | 4.1 | 4.8 | 5.5 | 6.2 | 6.9 | |||
| BNP 4 | 1/8″ | (3mm) | 3/16″ | 5(mm) | 15 | 17 | 19 | 22 | 24 | 26 | 0.43 | 0.48 | 0.54 | 0.62 | 0.68 | 0.74 |
| BNP 5 | 5/32″ | (4mm) | 5/16″ | (8mm) | 23 | 26 | 30 | 33 | 37 | 41 | 0.65 | 0.74 | 0.85 | 0.94 | 1.05 | 1.16 |
| BNP 6 | 3/16″ | (5mm) | 3/8″ | (9.5mm) | 34 | 38 | 43 | 48 | 54 | 58 | 0.96 | 1.08 | 1.22 | 1.36 | 1.53 | 1.64 |
| BNP 7 | 7/32″ | (5.5mm) | 7/16″ | (11mm) | 45 | 51 | 59 | 65 | 72 | 79 | 1.28 | 1.45 | 1.67 | 1.84 | 2.04 | 2.24 |
| BNP 8 | 1/4″ | (6.5mm) | 1/2″ | (12.5mm) | 58 | 68 | 77 | 85 | 95 | 104 | 1.64 | 1.93 | 2.18 | 2.41 | 2.69 | 2.95 |