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This guide has been prepared to show you the classifications of compressed air quality. This can help when trying to find the most suitable air compressor for your production.
As your partners in compressed air we will continue to provide you with the resources to ensure that you have the most efficient and reliable compressed air system for your production.
Quality class | Solid particle content | Water content | Oil content | ||
Max. size mu |
Max. amount mg/m³ | Dew point °C | Amount g/m³ |
Max. amount mg/m³ | |
1 |
0.1 |
0.1 | - 70 | 0.003 | 0.01 |
2 | 1 | 1 | - 40 | 0.11 | 0.1 |
3 | 5 | 5 | - 20 | 0.88 | 1.0 |
4 | 40 | 10 | + 3 | 6.0 | 5 |
5 | - | - | + 7 | 7.8 | 25 |
6 | - | - | + 10 | 9.4 | - |
Application areas | Quality Class | ||
Solid particle content | Water content | Oil content | |
Air stirring | 3 | 6 | 3 |
Air motors, large | 4 | 5-2 | 5 |
Air motors, minature | 3 | 4-2 | 3 |
Air turbines | 2 | 3 | 3 |
Transportation of granulates | 3 | 5 | 3 |
Transportation of powder | 2 | 4 | 2 |
Fluidistors | 2 | 3-2 | 2 |
Foundry machinery | 4 | 5 | 5 |
Contact with provisions | 2 | 4 | 1 |
Pneumatic tools, industrial | 4 | 6-5 | 4 |
Mining Machinery | 4 | 6 | 5 |
Packaging machines | 4 | 4 | 3 |
Textile machinery | 4 | 4 | 3 |
Pneumatic cylinders |
3 | 4 | 5 |
Film Handling | 1 | 2 | 1 |
Precision Regulators | 3 | 3 | 3 |
Process Instruments |
2 | 3 | 3 |
Sand blasting | - | 4 | 3 |
Spray painting | 3 | 4-3 | 3 |
Welding machines | 4 | 5 | 5 |
5 | 4 | 5 |
Dew Point °C | g/m³ | Dew Point °C | g/m³ | Dew Point °C | g/m³ | Dew Point °C | g/m³ |
+ 100 |
588.208 | 58 | 118.119 | 16 | 13.531 | -26 | 0.51 |
98 | 550.375 | 56 | 108.2 | 14 | 11.987 | -28 | 0.41 |
96 |
514.401 | 54 | 98.883 | 12 | 10.611 | -30 | 0.33 |
94 | 480.394 | 52 | 90.247 | 10 | 9.356 | -32 | 0.271 |
92 | 448.308 | 50 | 82.257 | 8 | 8.243 | -34 | 0.219 |
90 | 417.935 | 48 | 74.871 | 6 | 7.246 | -36 | 0.178 |
88 | 389.225 | 46 | 68.056 | 4 | 6.356 | -38 | 0.144 |
86 | 362.124 | 44 | 61.772 | 2 | 5.571 | -40 | 0.117 |
84 | 336.661 | 42 | 44.989 | ±0 | 4.868 | -42 | 0.093 |
82 | 311.616 | 40 | 50.672 | -2 | 4.135 | -44 | 0.075 |
80 | 290.017 | 38 | 45.593 | -4 |
3.513 | -46 |
0.061 |
78 | 268.806 | 36 | 41.322 | -8 | 2.984 | -48 | 0.048 |
76 | 248.841 | 34 |
37.229 | -12 | 2.156 | -52 | 0.031 |
72 | 212.648 | 30 | 30.078 | -14 | 1.81 | -54 |
0.024 |
70 | 196.213 | 28 | 26.97 | -16 | 1.51 | -56 | 0.019 |
68 |
180.855 | 26 |
24.143 | -18 |
1.27 | -58 | 0.015 |
66 | 166.507 | 24 |
21.587 | -19 | 1.05 | -60 | 0.011 |
64 | 153.103 | 22 |
19.252 | -20 | 0.88 | -70 | 0.0033 |
62 |
140.659 | 20 | 17.148 | -22 |
0.73 | -80 |
0.0006 |
60 |
129.02 | 18 | 15.246 | -24 |
0.61 | -90 | 0.0001 |
Continue through our compressed air guide:
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Compressed Air Budget - Part One >
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