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Design and principle of operation
3.1 Additional fittings
Î See Fig. 3-3
Pressure gauges
Install a pressure gauge (3 and 5) at suitable
points to monitor the pressures prevailing in
the plant.
Legend
1
Shut-off valve
2
Strainer
3
Pressure gauge (flow pipe)
4
Type 2479/2430
The minimum required plant differential pressure
∆p
across the valve is calculated as follows:
min
∆p
min
∆p
Differential pressure created at the restriction for measuring the flow rate in the regulator
restriction
·
V
K
VS
Fig. 3-3: Type 2479/2430 (installation example)
3-4
1
–
8
Pressure gauge (return flow
5
pipe)
6
Shut-off valve
7
Control line mounted on site
Minimum differential pressure across the valve in bar
Adjusted flow rate in m³/h
Valve flow coefficient in m³/h
Bypass and shut-off valves
We recommend installing a shut-off valve (1
and 6) both upstream of the strainer and
downstream of the regulator and installing a
bypass line. The bypass ensures that the
plant does not need to be shut down for ser-
vice and repair work on the regulator.
2 7
5
6
+
3
5
Δp
= Δp
min
restriction
4
Temperature sensor with
8
capillary tube
·
2
)
(
V
+
K
VS
EB 3132-3 EN
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