Measuring Min. Max. Factory Note
Oil pressure (bar)
Calculated value
SAB 80
Low alarm
Low shutdown
Set point 1
Set point 2
1.5
1.0
0.0
0.0
6.0
5.0
10.0
20.0
2.0
1.5
0.5
16.0
2+9
2+9
20
20
Oil pressure (bar)
Calculated value
SAB 109
Low alarm
Low shutdown
Low alarm coefficient
1.3
0.8
0.5
5.0
5.0
1.0
1.3
0.8
0.5
2+9c+28
2+9c+28
Oil pressure (bar)
Calculated value
SAB 133-159
Low alarm
Low shutdown
Low alarm coefficient
2.0
1.5
0.25
5.0
5.0
1.0
2.0
1.5
0.25
2+9c+28
2+9c+28
Oil pressure (bar)
Calculated value
SABflex
Low alarm
Low shutdown
Set point 1
Set point 2
Low alarm coefficient
2.0
1.5
0.0
0.0
0.25
5.0
5.0
10.0
20.0
1.0
2.0
1.5
2.5
3.0
0.25
2+9c+28
2+9c+28
21
21
Diff. pressure across
oil filter (bar)
Calculated value
All types except SAB 80,
SAB 120-151, SAB 157HR and
SAB 193-233-283-355
High shutdown
High alarm
0.0
0.0
1.5
1.3
1.0
0.7
2+11a
2+11a
Diff. pressure across
oil filter (bar)
Calculated value
SAB 120-151 and
SAB 193-233-283-355
High shutdown
High alarm
0.0
0.0
4.0
4.0
2.0
1.7
2+11b
2+11b
Diff. pressure across oil filter
(bar)
Calculated value
SAB 157HR
High shutdown
High alarm
Low alarm
Low shutdown
0.0
0.0
-
-
2.0
1.6
-
-
1.5
1.2
-
-
2+11b
2+11b
-
-
Diff. pressure
across oil filter (bar)
Calculated value
SAB 80
High shutdown
High alarm
0.0
0.0
2.5
2.5
1.6
1.4
2+11a+19
2+11a+19
Diff. pressure across oil
filter (bar)
Calculated value
SAB 109-133-159 and SABflex
High shutdown
High alarm
Low alarm
Low shutdown
0.0
0.0
-
-
2.0
1.8
-
-
1.5
1.2
-1.0
-
2+11a+25
2+11a+25
-
Oil pump pressure (bar)
Calculated value
SAB 120-151 and SAB
193-233- 283-355
High shutdown
High alarm
Low alarm
Low shutdown
-
-
0.0
0.0
-
-
3.2
3.2
-
-
0.4
0.1
-
-
2+5+30
2+5+31
Table 8: Measured and calculated pressure levels - screw compressors
Alarms and shutdowns
38/319
Engineering manual - Unisab III 1.10
001930 en 2014.09
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