Product description
2.2
Operating principle of compressor
Page 20
Operating instructions for S 40-3...S 150-3 series screw compressors
Technical Data SF 60-3...SF 150-3, part 2
2.2 Operating principle of compressor
Functional principle of
the air end
The air end operates according to the displacement principle. In the housing,
the main and secondary rotors are driven by means of an electric motor and
V-belts.
Type
SF 60-3
SF 100-3
SF 150-3
Oil filling quantity
Oil receiver volume
[gallon]
12.15
18.76
31.70
Total oil filling quantity
[gallon]
7.40
11.10
17.17
Oil topping up quantity
between min. + max.
[gallon]
1.59
2.11
2.64
Intake air temperature
– min.
[°F]
+ 41
+ 41
+ 41
– max.
[°F]
+ 104
+ 104
+ 104
Air
cool
-
Cooling air requirement
– free-standing installation
[cfm]
7651
10830
18834
– with supply and exhaust duct
[cfm]
3825
5415
9417
- free fan pressure
[Pa]
60
60
60
Wa
te
r c
oo
lin
g
Cooling air requirement
– free-standing installation
[cfm]
1200
1200
2000
with supply and exhaust duct
[cfm]
600
600
1000
Required cooling water quantity
– delta t = 15 K
[cfm]
1.44
2.41
3.53
– delta t = 30 K
[cfm]
0.72
1.20
1.77
Max. cooling water quantity
[cfm]
2.1
2.5
5.3
Cooling water inlet temperature
– min.
[°F]
+ 41
+ 41
+ 41
– max.
[°F]
+ 86
+ 86
+ 86
Cooling water outlet temperature
– max.
[°F]
+ 113
+ 113
+ 113
Cooling water pressure
– min.
[psig]
30
30
30
– max.
[psig]
145
145
145
Operating pressure transmitter
1
)
1)
Compressors for other operating pressures p
min
= p
max
– 7 psig.
(factory settings)
– p
max
= 100 psig: Switch-off press. p
max
[psig]
100
100
100
Switch-on press. p
min
[psig]
93
93
93
– p
max
= 115 psig: Switch-off press. p
max
[psig]
115
115
115
Switch-on press. p
min
[psig]
108
108
108
– p
max
= 125 psig: Switch-off press. p
max
[psig]
125
125
125
Switch-on press. p
min
[psig]
118
118
118
– p
max
= 150 psig: Switch-off press. p
max
[psig]
150
150
150
Switch-on press. p
min
[psig]
143
143
143
– p
max
= 190 psig: Switch-off press. p
max
[psig]
190
190
190
Switch-on press. p
min
[psig]
183
183
183
Safety valve
Activation pressure at:
– p
max
= 100 psig
[psig]
160
160
160
– p
max
= 115 psig
[psig]
160
160
160
– p
max
= 125 psig
[psig]
160
160
160
– p
max
= 150 psig
[psig]
160
160
160
– p
max
= 190 psig
[psig]
203
203
203