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6.1 Actuator stem
9
Set point adjuster
10 Set point springs
Fig. 7-1: Set point adjuster for differential pres-
sure
Type 45-1 and Type 45-2 in the flow pipe
1
2
4
6
1
Shut-off valve
2
Strainer
Pressure gauge (flow
3
pipe)
Fig. 7-3: Installation example: installed in the flow and return flow pipe
EB 3124 EN
Set point adjuster
Type 45-2 and
10
Type 45-4
6.1
DN 15 to 50
9
Manual adjuster
10
Type 45-2 and
18
Type 45-4
19
DN 15 to 25
25
18 Spindle
19 Manual adjuster
25 Scale reading
3
–
+
p
M
5
Differential pressure
4
regulator
Pressure gauge (return flow
5
pipe)
∆p bar
1.2
1.0
0.8
0.2 to 1 bar
0.6
0.4
0.2
0
1
2
3
Fig. 7-2: Differential pressure set point adjusted
according to the value on the scale
Type 45-3 and Type 45-4 in the return flow pipe
1
2
–
p
+
6
4
6
Shut-off valve
Operation
0.2 to 0.6 bar
4
5
Value on scale
3
M
5
7-3
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