Engineering manual - SAB 355 Screw compressor unit (including ATEX)
004100 en 2020.10
87/156
Technical data
Fig. 63: Starting torque curves for high-stage
Fig. 64: Starting torque curves for booster
Starting torque for specific compressor
Multiply the starting torque value from high-stage or booster curves at 100% of normal run speed
by starting torque multiplier for appropriate compressor size.
0
25
5075100
275
250
225
200
175
150
125
19
17
15.5
14
12
10
9
[Psig]
Bar
Starting torque
Speed vs starting torque curve fully unloaded
Percentage of normal run speed
Discharge pressure
40
60
80
100
120
140
160
180
200
220
240
260
280
[Ft-lb]
Nm
54
81
108
136
163
190
217
244
271
298
325
353
380
136
122
108
95
81
68
54
41
27
14
100
90
80
70
60
50
40
30
20
10
0
Nm
[Ft-lb]
50
100
75
Discharge pressure
0
25
55
45
35
25
15
10
3.8
3.1
2.4
1.7
1.0
0.7
[Psig]
Bar
S t a r t i n g t o r q u e
Percentage of normal run speed
Speed vs starting torque curve fully unloaded
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