Horsepower Compress Air Table Chart

Hydraulic & Pneumatics
Fluids Design and Engineering Data

Horsepower Required to Compress Air, Single-Stage Compression

Horsepower required to compress one cubic foot of free air per minute (isothermally and adiabatically) from atmospheric pressure (14.7 pounds per square inch) to various gage pressures.

Single-Stage Compression, initial temperature of air, 60°F, jacket cooling not considered.

Gage
Pressure,
Pounds
Absolute
Pressure,
Pounds
Number
of
Atmospheres
Isothermal Compression
Adiabatic Compression
Mean
Effective
Pressure *
Horsepower
Mean
Effective
Pressure,*
Theoretical
Mean Eff.
Pressure
plus 15%
Friction
Horsepower,
Theoretical
Horsepower
plus 15%
Friction
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
150
160
170
180
190
200

19.7
24.7
29.7
34.7
39.7
44.7
49.7
54.7
59.7
64.7
69.7
74.7
79.7
84.7
89.7
94.7
99.7
104.7
109.7
114.7
124.7
134.7
144.7
154.7
164.7
174.7
184.7
194.7
204.7
214.7

1.34
1.68
2.02
2.36
2.70
3.04
3.38
3.72
4.06
4.40
4.74
5.08
5.42
5.76
6.10
6.44
6.78
7.12
7.46
7.80
8.48
9.16
9.84
10.52
11.20
11.88
12.56
13.24
13.92
14.60
4.13
7.57
11.02
12.62
14.68
16.30
17.90
19.28
20.65
21.80
22.95
23.90
24.80
25.70
26.62
27.52
28.21
28.93
29.60
30.30
31.42
32.60
33.75
34.67
35.59
36.30
37.20
38.10
38.80
39.50
0.018
0.033
0.048
0.055
0.064
0.071
0.078
0.084
0.090
0.0
95
0.100
0.104
0.108
0.112
0.116
0.120
0.123
0.126
0.129
0.132
0.137
0.142
0.147
0.151
0.155
0.158
0.162
0.166
0.169
0.172
4.46
8.21
11.46
14.30
16.94
19.32
21.50
25.53
25.40
27.23
28.90
30.53
32.10
33.57
35.00
36.36
37.63
38.89
40.11
41.28
43.56
45.69
47.72
49.64
51.47
53.70
55.60
57.20
58.80
60.40
5.12
9.44
13.17
16.44
19.47
22.21
24.72
27.05
29.21
31.31
33.23
35.10
36.91
38.59
40.25
41.80
43.27
44.71
46.12
47.46
50.09
52.53
54.87
57.08
59.18
61.80
64.00
65.80
67.70
69.50
0.019
0.036
0.050
0.062
0.074
0.084
0.094
0.103
0.111
0.119
0.126
0.133
0.140
0.146
0.153
0.159
0.164
0.169
0.175
0.180
0.190
0.199
0.208
0.216
0.224
0.234
0.242
0.249
0.256
0.263
0.022
0.041
0.057
0.071
0.085
0.096
0.108
0.118
0.127
0.136
0.145
0.153
0.161
0.168
0.175
0.182
0.189
0.195
0.201
0.207
0.218
0.229
0.239
0.249
0.258
0.269
0.278
0.286
0.294
0.303

* Mean Effective Pressure (MEP) is defined as that single pressure rise, above atmospheric, which would require the same horsepower as the actual varying pressures during compression.

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