Samson 42-37, Монтаж и эксплуатация

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3-6 EB 3017 EN
Design and principle of operation
Sample application (Type 42-37):
1 Shut-off valve
2 Strainer
3 Pressure gauge
4 Flow and differential pressure or pressure
regulator
5 Needle valve
6 Pressure gauge
7 Bypass with capped valve (recommended)
8 Shut-off valve
9 Shut-off valve
10 Motorized valve
18 Compensation chamber (optional)
9
V –+–+
5 8 4 6
3 1 2 18
.
7
10
Type 42-37 in the return flow pipe
Differential pressure and flow
control:
Type 42-39 in the flow pipe
Differential pressure and flow
control:
Type 42-39 in the flow
pipe
Flow and pressure control:
V –+–+
3
.
7
V –+–+
3
.
7
V –+
+
4
.
7
∆p
min
Minimum differential pressure across the valve in bar
∆p
restriction
Differential pressure created at the restriction for measuring the flow rate in the regulator
V Adjusted flow rate in m³/h
K
VS
Valve flow coefficient in m³/h
·
The minimum required plant differential pressure
∆p
min
across the valve is calculated as follows:
Δp
min
= Δp
restriction
+
(
V
)
2
K
VS
·
Fig. 3-4: Installation example: Type 42-37 and Type 42-39 installed in the flow or return flow pipe