4.03
TI013G0008
Table 1 – Load losses (bar) over 100 m straight piping
Pipe Free air delivery PRESSURE
Diameter [m
3
/min] [bar]
6 7 8 9 10
1” 1 0,087 0,076 0,068 0,061 0,056
2 0,315 0,275 0,245 0,220 0,200
3 0,666 0,583 0,518 0,467 0,424
4 1,134 0,993 0,883 0,795 0,722
2” 8 0,138 0,120 0,107 0,096 0,088
16 0,496 0,434 0,386 0,347 0,316
24 1,050 0,919 0,817 0,735 0,669
3” 8 0,019 0,017 0,015 0,013 0,011
16 0,069 0,060 0,054 0,048 0,044
32 0,248 0,217 0,193 0,174 0,158
64 0,894 0,783 0,696 0,626 0,570
4” 16 0,018 0,015 0,014 0,012 0,011
32 0,064 0,056 0,050 0,045 0,041
64 0,230 0,201 0,179 0,161 0,146
128 0,829 0,725 0,645 0,580 0,528
After air has been compressed, it is coo-
led in the radiator, which all versions of the
Mattei compressors are supplied with.
Cooling the air produces condensate ba-
sed on the quantity of moisture in the intake
air. The condensate produced is separated
and drained with an automatic device (S
and SE version).
It is to be noted that it should be collected
and discarded in compliance with ruling
laws.
Dimensions of compressed air distribu-
tion pipings
We mention that the main causes of energy
losses are pipings with unsuitable diameter
and losses due to an improper setting up
of the equipment or deteriorated materials.
The pipe diameter must be duly selected
so as to minimize the pressure drop betwe-
en the compressor or the storage receiver
and the point of use, based on the machine
features, like air delivery and working pres-
sure.
The pressure drop is proportional to the
pipe length and most losses occur during
the change of direction (curves, elbows)
and in the valves.
With a pipe having the same diameter as
the compressor outlet, the length should
not exceed 50 m.
To make a check of one’s own equipment,
“Table 1” gives the load losses, over 100
meters straight piping, according to no-
minal diameters usually employed and at
different air delivery and working pressure
conditions.
A perfect air distribution system should limit
the pressure drop from compressor to the
point of use within few tenths of bar.
Installation
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