Baldor BD Series User Manual page 21

BALDOR AIR COMPRESSOR
supply air by special line or install storage tank near the air compressor to relieve the load, making the
pressure stable.
the selection of pipeline size
c.
There is friction resistance in the pipe line and resistance is produced in the valve, joint, bend and the
changed diameter pipe
drop of a section pipe line can be calculated in the table below.
Table 7-1 air flow-pressure drop of pipe line
air flow
m 3
/ min
1/2
0.8 5.87
1.0 9.18
1.6 23.5
1.8 62.0
2.0
2.2
2.4
2.6
3.0
air flow
3
m / min
3/4
3.4 22
3.8
when the air
flows in the pipe, leading to the loss of air pressure. The pressure
3/4 1
1.23 0.339
1.92 0.53
4.9 1.36
6.20 1.72
7.66 2.12
9.26 2.56
11.0 3.15
12.9 3.58
17.2 4.77
1 1 1/2
6.13 1.55
7.66 1.94
Kg
（inch）pipe diameter
1 1/2 1 3/4
0.858 0.038
0.134 0.059
0.343 0.152
0.434 0.192
0.536 0.237
0.649 0.287
0.772 0.342
0.906 0.401
1.21 0.533
（inch）pipe diameter
1 3/4 2
0.684 0.193
0.855 0.241
21
/ cm 2 -(100 m)
2 2 1/2
0.0157
0.0428
0.0541
0.0668 0.0177
0.0808 0.0214
0.0967 0.0255
0.113 0.0299
0.150 0.0398
2 1/2 3
0.0511 0.0203
0.0636 0.0264
3
0.0168
3 1/2