Burkert S030 Manuel Utilisateur page 10

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Select an appropriate fitting regarding to the flow
velocity and the flow rate of the fluid in the piping, see
the following charts:
These charts make it possible to determine the DN pipe
and the appropriate fitting to use, according to fluid velocity
and flow rate.
Example :
- Specification: if the nominal flow is 10m
sioning of the optimal flow rate must be contained in 2 to
3m/s
-Answer: on the chart, the intersection of flow rate and flow
velocity gives the appropriate diameter, DN40 or DN50 for
fittings with *.
* For fittings :
- with external thread connections according to SMS 1145
- with weld end connections according to SMS 3008,
BS 4825 / ASME BPE or DIN 11850 Series 2
- with Clamp according to SMS 3017 / ISO 2852 or
BS 4825 / ASME BPE or DIN 32676
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Install the fitting on the pipe as shown in
conform to the upstream and downstream distances
defined by standard EN ISO 5167-1:
50 x DN 5 x DN
regulating valve
25 x DN 5 x DN
two 90° elbow joints
18 x DN 5 x DN
extension
Fig. 3: Upstream and downstream distances depending
on the design of the pipes.
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34
/h, the dimen-
3
Fig. 3 to
40 x DN 5 x DN
two 90° elbow joints, 3
dimensional
20 x DN 5 x DN
one 90° elbow joint or
T-piece
15 x DN 5 x DN
reduction
gpm
m /h
3
l/min
1000
200
3000
2000
500
100
1000
50
200
500
100
20
200
50
10
100
5
20
50
10
2
20
5
1
10
0.5
2
5
1
0.2
2
0.5
0.1
1
0.05
0.2
0.5
0.1
0.02
0.2
0.05
0.01
0.1 0.3 0.5 1
0.3 0.5 1 3
flow velocity
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To measure the flow rate, use a flow conditioner, if
necessary, to obtain the best accuracy.
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Respect the following additional installation conditions
to ensure that the measuring device operates correctly
(Fig. 4 and Fig. 5):
- prevent the formation of air bubbles in the pipe
- ensure the pipe is always filled with liquid.
correct
correct
direction of the flow
Fig. 4: Additional recommendations on installation
DN65
DN50 (DN65)*
DN40 (DN50)*
DN32 (DN40)*
DN25 (DN32)*
DN20 (DN25)*
DN15 (DN15
or DN20)*
DN08
DN06
5 m/s
3 10
5 10 30 fps
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33 33
incorrect
incorrect
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35 35