Volume (V) | Volume V [l, m³]
Compressed air in expanded state, open air
The volume is determined, for example, by the size of a cylinder.
It is measured in l or m³ and relative to 20 °C and 1 bar.
The numbers in our documentation always refers to compressed
air in its expanded state.
VCyl = Volume [m3]
d = Diameter [m]
h = Height [m]
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Norm volume (0°C) + 8% = Volume (20°C) | Normal volume VNorm [ Nl, Nm³ ]
Compressed air in expanded state under normal conditions
The normal volume refers to the physical normal state as specified in DIN 1343. It is 8 % less than the volume at 20 °C.
760 Torr = 1,01325 barabs = 101 325 Pa
273,15 K = 0 °C
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0 barabs 8 barabs | Operating volume Voperate [Bl, Bm3]
Compressed air in compressed state
The volume in operating state refers to the actual condition. The temperature, air pressure and air humidity must be taken into account as reference points.
When specifying the operating volume the pressure must always be given, e.g. 1m3 at 7 barü means that 1m3 expanded (relaxed) air at 7 barü = 8 barabs compressed and only occupies 1/8 of the original volume.
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